| I recently finished a Kingsmotorbikes 80cc installation on a Schwinn Stingray. The experience of motoring on something you've built yourself is awesome and the reactions of people have been pretty enthusiastic, especially the kids. The purists have been pretty hard on this bike, but its a lot of style and bling for the money, the motor makes it a complete package. by: 65.144.247.228 |
| ive just bought a schwinn stingray in australia and im about to buy a kings motor bikes 80cc engine kit off ebay can you give me any tips on things i will need to buy other than the parts supplied in the kit, or any other problems i might have with the installation of the motor kit. how do you find performance (speed, acceleration). thanks, bart. by: 150.101.113.243 |
| In order to ease the installation, order an adapter kit from yeoldesalt.com aprox. $40 US. consisting of a 5" wide strip of 1/4" plate bent up at both ends to cradle the motor and a 4" length of chain. The simplicity of the kit put my bodging to shame. A farm equipment idler gear with the teeth cut down to fit a bicycle chain should be made (to replace the plastic tensioner pulley -it lasts about 20 miles) along with a slotted plate. Adjust the bits to fit the square tubing.Cut the fender for chain clearance with dremel. The chainguard breaks at the engine-reinforce and it still breaks. A hand choke makes things nicer. The cables- clutch and gas are shite. I'm looking to the local cycle shop for quality replacements. Top speed so far is 34 mph on the down hill 20 being a smooth cruising speed. The seat is torture after mile six although I'm growing used to it. The red loctite with a sheetmetal washerplate with tabs to fold over the 4 engine bolts are a must. The exhaust will eject at around mile 17 without red loctite. Torque the head bolts as instructed, oil seeps at the head gasket will warn you of impending doom,keep a 10mm wrench on the bike, funny noises are important so stop and look. Forty miles and counting, 17 today, a little chilly but fun. by: 69.34.207.219 |
| Also the stock ignition vibrates apart at the electode on the spark plug, solder on an auto style reciever and lug. by: 208.24.179.208 |
| After concluding the "break in" of one tank of fuel at 20/1, I mixed a tank at the recommended 35/1 and set off for the next town. At aprox. five miles the air cleaner assembly ejected and the motor seized. Back at the drawing board, I filled the cylinder with oil and worked the piston free, with the idea that the aluminum of the wall would eventually hone to the will of the steel rings. Several hundred rotations later we're on the road again with a more conservative oil/gas ratio and I'll be extending the "break in" for another tank or two. I would also recommend a length of wire be added to your carry on tool kit. by: 65.40.189.106 |
| I'm confused. You used a 20:1 ratio successfully, but when you changed to 35:1 the motor seized up? Doesn't 35:1 meant that you're using MORE oil than 20:1? Or is it the other way around? So what ratio do you recommend for everyday use, after the break-in period? Thanks. Oh, also, in a post above, you refer to a web site called "yeoldesalt.com" for an adaptor kit, but no such site exists. Is that URL correct? Thanks again. by: 204.167.148.2 |
| The ratio refers to parts Gas (first number) to parts oil (second number) as the first number increases the second number decreases and vice versa. My apologies the web address is yeoldesaltmotorbikes.com. Google makes you jump through hoops of fire to find it. The break in recommended by Kings was one tank and then 30/1 to 35/1. I myself am sticking to the 20/1 mix for the time being, this being aprox. 6.5 oz of oil to 1 gallon gas in my rudimentary guestimation. by: 65.41.221.112 |
| Its been snowy and icy for weeks here in Kansas, but today there is only ice on the roads in spots and its warmed up to 18 degrees F. it seemed like a good idea to take the chopper out. After some major pedaling, it fired up and away I went. Although my mustache quickly froze over with ice and my eyes watered at speeds over 35, I made a run up the hill to the town cemetary at 31 mph. On the down hill run I got up to 48 mph before entering the 30 mph speed zone. What a rush! Next I'm doing some work on the an expansion tube for the exhaust. by: 69.68.107.88 |
| Break in period is important. Do not operate at speeds above 15 mph or for more than 15 - 30 minutes at a time . Use the best quality " synthetic " 2 stroke oil .These motors vibrate and you need to keep checking all over your bike for loose nuts & bolts including the motor itself ! " Performance Improvement " Useing a dremel tool with a cerculer cut off wheel I cut the electrode tip of the spark plug creating a two prong tip , this causes the plug to have a more powerful dual spark .I also drilled extra holes in the air filter cap , this increases the amount of air going into the engine .All I can say is after I did this it kicked out more power & started alote easyer . by: 216.221.81.96 |
| Oh yeah drilling holes in the air filter cap make it sound cooler to ! by: 216.221.81.96 |
| The 60 and 80 cc motors are best avoided. I have built 2 bikes using the 48cc and they run great . One is a grubee the other is spitfire.The spit fire is a nicer engine, comes painted and doesn't leak oil as much as the grubee but they both run 30 mph on flat ground. You will want to replace the clutch and throttle with motorcycle type if you want looks and vibe dampening,and use red locktite on all bolts that you won't be loosening to adjust tension or clearance.Also, the motors over 50 cc require title and ins in most states!Take your time with your install and you will enjoy it more! by: 66.226.103.167 |
| On a recent ride the motor seized permanently. With the top end removed there are no indications of problems, the bore is pristine as are the rings. Everything points to the bearing on the bottom end. So the motor is coming out. Perhaps Mr. Grube's "european bearings" are not such a bad idea, also would adding a couple of oz. of 2-stroke oil to the crankcase at installation have prevented this? by: 65.40.248.88 |
| Upon taking the motor apart I noticed that the needle bearings on the lower end rod had no collar or remains thereof. This would have resulted in too much clearance between the bearings and the connecting rod, I will know more when the replacement parts arrive. by: 207.43.195.203 |
| We are building a Schwinn Stingray using the same kingsmotor 80cc engine kit, and we were having trouble getting the sprocket on the back tire. The sprocket hub is too big and blocks the screws from going all the way through. What did you do to get around this? Thanks in advance by: 205.188.116.198 |
| Not wishing to pay a machinist, I laid out a piece of carpet on a board, inserted a curved back file in the center of the sprocket and rolled it forward while pressing down. Eventually it gets big enough to fit over the the hub, then drill five holes between the spoke ends on the flange. Place the sprocket on the hub and use a pencil to marke the holes on the sprocket, drill and bolt. I'm still waiting on the parts to arrive to rebuild the kings motor, and with good weather coming I ordered and recieved a Gru-Bee 49, then five hours labor and I'm back on the road. I'm using Blue Marble two stroke oil this time for luck and power. by: 207.43.195.203 |
| I bought an 80cc kit a little while ago and I think I have set up the back wheel/sprocket wrong. I had the sprocket against the hub and then the screws going through the spokes. the problem was when i would go up a hill there was to much torque and my spokes broke under the stress. any suggestions please, please let me know. thanks matt by: 68.102.220.47 |
| I got the stingray up and running, the only problem I have with it now is that the throttle is stuck in the wide open postion. Is there any advice anyone has on getting it out of this position. I'm pretty sure I connected the cable to the carburetor right, but the instructions aren't too clear. I'm going to buy a new cable for it tomorrow. Hopefully that will fix it. I'll post an update on how it goes. by: 66.25.248.80 |
| Sorry for the double-post, but I have another question. Does anybody know what it would take for the stingray with an 80cc engine to be street legal? by: 66.25.248.80 |
| I can't imagine that would be legal unless there is provision in the law for some kind of speed restriction device by: 211.31.15.77 |
| To be legal, it would require the whole moped treatment, lights,turn signals, etc. But in close comparison of the Skyhawk GT2 49cc. and the Kings 80cc. I could not percieve any major difference in the two, maybe the piston height? The flywheel of the Kings was stamped 49cc. Regardless keeping the speed under 35 and sane opperation would be the best avoidance. by: 208.24.179.27 |
| Just posting an update on the bike, also I'm posting a picture with this. It's running great and goes faster than I thought it would. Everywhere I go people are turning their heads. I've ridden it to the next town taking the backroads with a friend driving his truck on the mainroads and we arrived at our destination at the same time. This has to be the best investment I've ever spent for the money. I can't wait to bring it to the local street cruises.[p][a href=http://img233.exs.cx/img233/5799/mychopper32dj.jpg target=_blank][img src=http://img233.exs.cx/img233/5799/mychopper32dj.jpg width=40 height=40 ][/a] by: 66.25.248.80 |
| Put some lube on the plastic roller tensioner shaft to reduce wear (plastic on metal isn't pretty at max rpm) I went with a steel idler gear, after the roller broke down from heat exhaustion and stress. by: 65.40.189.145 |
| Please help me. Short of welding the sprocket to the rear hub I can't think of how to assemble the rear of the bicycle to with stand the stress on the spokes themselves. How did you guys do it?? Please any help is appreciated. by: 68.102.220.47 |
| On the Stingray the hub flange is large enough to drill holes between the spoke ends, I kept it to five holes to avoid weakening the structure. I haven't encountered anywhere near sufficent torque to stress the flange. by: 207.43.195.204 |
| I'm in the midst of building 64 scwinn traveller with an 80cc kingsmotor on it, for wheels I got a set from gru-bee that had the sprocket bolted directly to the extra large flange hubs, I saw on ebay that this guy had milled up some adapters that would do the same for the new stingray wheels. I can't speak from expierience about the adapters, but I love the wheels I got from gru-bee for my bike. by: 24.28.67.138 |
| What site did you get the gru-bee wheels from? Most of the adapters I've found are one-offs from guys with milling machines, none seem to be for sale yet. Heck just a properly drilled (American spacing)sprocket could make this rear wheel problem much easier. by: 65.173.76.53 |
| The Kings parts are still on their way, And the break in of the Gru-Bee continues, I'm about half way through the first gallon. I can squeeze in about three miles most mornings before I have to go to work, though the temps are staying in the forties. The bike doesn't fit in the Nissan Pathfinder and the Ford 3/4 Ton Van sucks too much gas so its been staying at home until a bike rack appears on the back of the Nissan. This engine is much more civilized than the Kings, much less vibration and bike/motor parts are not flinging themselves off. Power is less but if the break-in bonus pays off, then its a trade I can live with. The Bell comfort saddle is truly one of the best features I've added, a suspension on one end or the other would be the cats' pajamas. by: 69.34.204.53 |
| Upon perusing the bikerodnkustom site, I found that due to my factory paint and stingray decals, my bike doesn't qualify and at the schwinn heritage site, the motor disqualifies my welcome, my answer to a question about motorizing was deleted, as was the question. Perhaps a place for these particular motobikes should be created? On another front, I got 20 miles on the bike over the past two days with a combination of in town stop-n-go and kuntry kruisin on the gravel roads. Riding on gravel is unnerving at times but treated with respect, makes for a bumpy kind of serentity on the Kansas prairie. by: 65.41.102.87 |
| check out www.peninsulacustomcycles.com for pics of my badass stingray chopper! by: 12.72.195.14 |
| Those tripletrees are awesome, where can they be found. I've got the Boa wrestled onto the 20 x 1.75 but the tripletrees have me stumped. They resemble the mini-chopper forks, are they the same? What modifications have to be done to make them fit the Stingray by: 216.236.17.39 |
| Anyone ever put one of those 80cc's onto a regular 20" stingray lowrider?[p][a href=http://photos5.flickr.com/7154533_26a7b1df5b.jpg target=_blank][img src=http://photos5.flickr.com/7154533_26a7b1df5b.jpg width=40 height=40 ][/a] by: 63.246.174.244 |
| They have a 49cc in the photo gallery/custom section at mopedarmy.com. If thats a 60's original bike, I would suggest you find another project, if its a re-pop fold, spindle, and mutilate to your creative limits. by: 65.41.100.88 |
| Hey Edward, I've already got the kings 80cc motor and the yeoldsalt motorbike mount, would you have any tips or advice to give to me about installation? Just starting out.. Any help would be great! cheers by: 203.87.117.119 |
| I've slapped the 80cc kings kit on a older style mountain bike and it's been a reasonably good fit. Only thing i've had 2 machine was the rear sprocket (the center hole wasn't big enough 2 fit flush against the spokes). Other probs i've found have been exhaust header clearance (around slightly fatter frames it touches the downtube) and i've had 2 bend / hacksaw off the bolts on the downtube mounts 2 get around the fatter tube. It's hell fast when it's set up but can b a pain if u don't have a suitable bike! by: 211.31.15.77 |
| Oh ok thanks.. well I am mounting it on to my stingray by: 203.87.117.119 |
| Look at every photo you can find of these bikes for mounting location, I made mine fairly far forward with the bolt holes on the center line. Also BMX style wheel tensioners, the cheap ones will be worth every penny and then some. Email me direct if you have any issues or questions, I'll be glad to help. by: 69.34.204.15 |
| Both master links failed in the past week. The first time I was not far from a Town & Country hardware store. They do not stock a direct replacement but have a pack of 4 for $3US that have a longer stud. I stacked one of the extra links on top to take up space under the clip thus giving double strength to the master link (at least on one side). The extra width is not an issue on my bike so long as the clip faces out. I should have replaced the other master link then but was in a hurry and so had to do it today while on a ride around one of the local lakes. Find some of these for your emergency kit or you will regret it by: 69.34.204.15 |
| I recently purchased an expansion chamber from the local cycle salvage yard for way too much money, but its for the Stingray, so it had to be purchased. It came from a Honda dirt bike and was the smallest I could locate. In order to make it fit, I had to section it with a dremel, rotate the sections and weld it back together. Once it was on the bike there is quite a difference in exhaust note, especially without the spark arrestor. Accelleration is quicker with a higher top end. In addition the exhaust gasket has survived several removals and shows no sign of blowing like its predecessors. by: 69.34.119.136 |
| Can anyone out there tell me how they mounted their gas tank? The hardware I received will not work on a Stingray with the reinforcment on the stear tube portion of the main triangle. by: 12.210.239.35 |
| The front bracket is unusable so it falls to the rear bracket to be the sole connector. This is the common and only solution that I have seen so far. by: 69.34.119.136 |
| Yesterday I decided to try to modify the engine (ala Kreidler) and shaved 5mm off the intake side of the piston. The difference was not noticeable although the CDI unit failed after a 32 mph. pass and may have affected the top speed. Some cleaning of the ports and a larger carb may be needed. Also the vibrations ejected the following parts: rear brake pivot bolt, CDI unit, air cleaner cover (cracked at the bolt),air cleaner element, and associated hardware. by: 208.24.179.12 |
| With the construction of a new bracket and the addition of an Accel Super Stock 8 mm plug wire, the CDI unit is safely attached to the frame beneath the seat. A replacement carb w/ the new improved steel breather has been installed, seals-all added to the valve tank junction and 3/8 rubber fuel line run. The carb choke handle was drilled and bent for the hand choke attachment and loctite put on the float bowl screws( No Buddist protests for me.). The bike fired right up but is still stuck at the 30 mph. mark, the speed will come, I've just got to get it all sorted out. by: 69.34.119.30 |
| Today in the never ending quest for speed,I added 3 oz. of Ace Hardware Lacquer Thinner to a full tank of fuel. Nothing happened for the first five minutes or so, then as I pulled up to a stop sign the idle shot up and had to be adjusted back down. It seems a little more peppy and top speed went up one mph. Then I removed the Honda expansion chamber and fabricated a smaller one using the muffler that came w/ the kit.It was sectioned and gutted with a new rear cone. A baloney cut rear pipe completes the look. It was raining and dark so full speed tests have to be delayed, however the exhaust note is awesome, full and robust, something like a Harley dirtbike. by: 69.34.119.30 |
| Well back to the drawing board, the exhaust while loud and full, is not a performance enhancement. Top speed 23, I'm sure it has to do with the lack of back pressure. So the Honda X-chamber will go back on while the Harley pipe gets some restriction. On a side note, the louder exhaust did get the attention of a little old lady who was about to pull out in front of me, maybe louder exhausts do save lives. by: 69.34.119.30 |
| i just bought a moterized bike that is like the old whizzers and it has a kings motor on it and i was just wondering if all of their motors are two stroke or if they have a four stroke motor too. thanks, Justin by: 64.12.116.199 |
| i just bought a moterized bike that is like the old whizzers and it has a kings motor on it and i was just wondering if all of their motors are two stroke or if they have a four stroke motor too. thanks, Justin by: 64.12.116.199 |
| I just bought a Schwinn Stingray, and A kingsMotorbike 80cc engine, will I have any problems putting the engine on, when I get it? by: 64.246.140.244 |
| The motormount kit from yeoldsaltemotorbikes.com is a good starting point, however their site is sometimes difficult to get to for reasons unknown.Heres their ph# Yeoldesaltmotorbikes.com 1-866-594-6500 by: 67.77.57.70 |
| The Kings engines are to the best of my knowledge all two stroke. This can be determined by the crankcase oil and the fuel mix. The 2-stroke will have no crankcase oil and need a gas/oil mix for lubrication. The 4-stoke will have crankcase oil and take straight gasoline. The early Kings motors can be distinguished from the later ones by their being in one piece and the fact they will still run. by: 67.77.57.70 |
| Last Sunday I took the Stingray on a thirty mile ride, the little Gru-Bee roared through the Harley pipe at 20 mph. for most of the way with the last five miles done at 30 mph. The only part ejecting was an exhaust stud and nut, a new record!I've decided to install a 32 tooth rear sprocket (thanks Simpsonmotorbikes!)for easier cruising at speed and I've ordered the 55cc. hop-up kit (Dennis Foster -Gru-Bee) to make up for the loss in off the line power. by: 65.40.249.221 |
| On Saturday April 30, 2005 I competed at the Lake Garnett Motorcycle and ATV Field Day event. Due to the classes available and my Stingray not being a factory bike, I was placed in the 250 ATV Modified class. Never the less I endeavored to to my best and represent the Motorized bicycle to the public. The Gru-Bee engine didn't let me down and I had a great deal of fun.[p][a href=http://www.photodump.com/viewer/Edward/DSCN1647.html target=_blank][img src=http://www.photodump.com/viewer/Edward/DSCN1647.html width=40 height=40 ][/a] by: 65.40.249.221 |
| With the addition of a 32 tooth rear sprocket to the 55cc kitted engine has resulted in a top speed of 42 mph. More work remains to done w/ jetting and a few mor mods so I can close on the Half-Ton. by: 65.41.101.94 |
| Edward, How the heck did you open the krankcase? Installed the kings 80cc on an old mountainbike. half way through 2nd tank the throttle got stuck on full. managed to fix it on the road but it caused something to come loose and ping around in the engine. pedalled home and took it apart and shook a rivet out of the crankcase. by: 24.84.222.73 |
| By carefully slicing the gasket around the circumference, then gently prying very gradually working around the edge. Inserting a screwdriver too far in will damage the lip around one half so don't do it. by: 207.43.195.204 |
| The Stingray is still going strong, one of the motor bolts broke off in the case and now sports an equally broken ez-out tool in its center. I gave up and drilled/tapped another hole in the case. The yeoldesaltemotorbikes motor mount was allowing too much movement with its wide bolt slots, so I welded washers over the slots in the correct positions. I recently made two trips totalling 32 miles on my bike without incident. My ride to work this morning revealed that cans of Pepsi and gravel road motorbiking lead to exploding cans. The return ride featured the ejecting Bell Bicycle Headlight, which blossomed into many pieces of flying plastic,batteries,and a small bulb. A more durable means of securing the headlight should be designed. The brake design of the Schwinn Stingray is not very effective at functioning when combined with the inherent wobble of the four inch wide rim. The brakes must be backed off to not drag and then must be tightened in order to slow the bike. Even with the addition of a small bungee cord to assist the laughable return spring assembly, it still drags and I must use my feet ala Fred Flintstone to slow down. by: 65.41.97.249 |
| I have the kings motor bikes 80cc. It's a great toy, goes over 30mph, but it is very unreliable. The gasket between the bottom crankcase halves leaks massive amounts of fuel vapor. It vibrates so much that both bike fenders and the motor chain guard broke from metal fatigue. Really dangerous! I just added 8 cable ties to the front bike brake, since its bolt broke in half! by: 71.102.129.21 |
| If its leaking from the engine crankcase, the engine will be in a lean condition and will seize shortly. If its an Exhaust leak not so bad, leak anywhere else is very bad. Repair at the earliest possibility. by: 65.40.190.117 |
| After the recent snowstorm dumped a good six inches, encouraged by a friend who was braving the elements on his Honda scooter, I attempted to start the Stingray in the snow. The physical effort combined with balancing on snow and a balky engine made it quite improbable that combustion would occur. After laying it over for a final time, I bid my friend goodnight and parked the Stingray to await more congenial weather conditions. Come on Spring! by: 69.68.107.244 |
| 3 months ago i put a kings 80cc kit on a brand new stingray. it is awesome fun and sometimes transportation in my little town. I have added steel gussets to the rear forks and seat thes and more welding topped with gloss black spray paint have done wonders for the stability of my bike. I cut the muffler off and ran the exhaust out the rear with electrical conduit. The many tricks i read on this page have helped me alot in the building process. though i have to say if you realy line the motor up right with regular maintainance you can put over 200 miles on the plastic roler assembly. my original is still rolling strong. I hahe also added 5 inch rise handlebars, Spedo kit and a 26 inch wheel on the front, it realy rides like a chopper. good luck to all with this project. by: 65.166.70.3 |
| just joining hoping to learn lots from you guys cuz i don't have a head for this stuff. but i thought id reveil what i know about the carbeurator for those confused ( I was for like a week, those directions can be bogus).Anyway you have to run the cable all the way through that brass chamber to the the back by removing the little circular thingies and sliding it through the slot. (all you smart people are grimacing but this stuff isnt easy fer all of us.)hope this helps but it probably won't. anyway i think it would be awsome if somebody whose mastered this stuff ( like proper assembly) could make a little checkilist of things to consider for all of us confused ones who don't know better so we don't waste our precious monies. by: 24.59.75.160 |
| Well I made the 101 mile journey to Galesburg KS, along with my friend Bryce. He rode his Stingray that I built for him last year, he has been modifying it since (hence the car stereo). Heres the address for the movie http://www.vimeo.com/clip=55799 Hope you like it. by: 69.34.205.121 |
| My Motorized Stingray recently experienced bearing failure on the right side of the wheel. The inner bearing race detached and retired to the inner hub. Faced with buying a new bike for the rear wheel or fixing it somehow, I went with the somehow. Purchase : 1. TRU-PITCH pump bearing #6202ZZ 15mm, 2. HILLMAN Sleeve Bushing Bronze 3/8x1/2x1 #838643 3.HILLMAN SleeveBushingBronze 1/2x5/8x1-1/8#838644 Use hand grinder or Dremel on the exposed inner threads of the sprocket, do this gradually to fit, 4 threads deep. Tap the small bushing into the large one, use a table grinder to reduce the bushing to fit the bearing, don't forget to leave a shoulder so it doesn't go all the way in. Cut to fit for length. Good so far to 32 mph. and smooth. by: 69.34.205.121 |
| "Carburetor" as the old joke goes, is French for "Don't #### with it." They are best approached with a diagram in hand. The Stingray is still going strong, as are all the other Gru-Bee engined I've built. I'm thinking of doing a pilgramage on the Stingray to the site of the Shaw Motorbike Co.(1905-1926) in Galesburg, Kansas to commemorate 101 years of motorized bicycles in Kansas in the Spring. The weather here has been extremely rider friendly, so I'm racking up the miles. by: 71.0.208.179 |
| I've set-up 2 bikes now with the Kings 80cc. My first was a re-pop 55 schwinn cruiser deluxe. My latest a Felt 1903-which looks awesome but hasn't been run for more than 1 mile. My buddy is a retired machinist and he fabbed some motor mounts which make it possible to mount to the larger tubes. My initial engine was a 60cc, which seized and after removing the barrell I was able to release it and run it another 60 miles before it started making some pretty horrible noises then boom. I replaced it with the 80cc and have about 5 miles on it. I'm going to stick with the break-in gas oil mixture and see what happens. I'm fairly convinced that these motors won't last long under hard running. Taking it easy, on the other hand, isn't nearly as much fun. My next project will be the Felt MP-another eye-catcher, but we'll see about reliability. by: 71.198.190.124 |
| Watch out for those red intake gaskets that come with the kits, they dissolve into a peanut butter goo and that causes the fuel mix to go lean and your motor will seize. Use automotive grade gasket material (green or black)and cut your own, its much safer. by: 67.77.59.152 |
| I bought an 80cc kit from King's Motor Bikes from eBay. I have been very happy with it so far. I put the kit on in the first week of last October and have already put nearly 600 miles on it. I installed it on a Dynoglide beach cruiser with a springer fork. Only parts of the kit I didn't use were the clutch lever and cable. I got high quality dirt bike parts from the Yamaha dealer, and fabricated the mounting bracket to connect to the engine. I do have to tighten all the nuts at least every other week. The exhaust gasket blew at about 400 miles. I noticed that the engine actually started making more torque when it blew, and went up hills 3 or 4 mph faster with the leaking gasket, I guess because of less restriction, though the top speed is limited by the rev limiter. I put a new gasket on last week. The engine is making a lot more power now that it is worn in than when it was new. My top speed with the 44 tooth rear sprocket is 34 mph, and I get about 115 mpg, on hilly roads, driving 6 miles daily. [img]http://www.no-grip.net/forum/files/MudSnow_1128890089_Dscf0012s.jpg[/img][p][a href=http://www.no-grip.net/forum/files/MudSnow_1128890041_Dscf0010s.jpg target=_blank][img src=http://www.no-grip.net/forum/files/MudSnow_1128890041_Dscf0010s.jpg width=40 height=40 ][/a] by: 66.190.237.251 |
| I'm looking into getting a King's motorized 80 cc bicycle can anyone give me the pros/cons of this companies bicycles? Thanx to all by: 64.136.27.228 |
| My experience w/ the Kings motor is detailed in this post (Con) Go Grube! The Stingray is well suited to motorizing, the rake of the front forks makes it very stable at the upper speeds, other bikes w/ less rake are twitchy in comparison. by: 65.40.189.27 |
| Texas has mentioned earlyer about mounting one of the King's 80cc engines on the classic stingray bikes. Well, I happen to be doing just that and have made quite a bit of progress so far. The bike itself is a 1975 or 6 and was originaly lemon yellow, I picked it up at a local goodwill and broke the bank at 8$ Having one of those 80cc kits laying around for nearly a year it was the first thing in mind. The bike itself is coming together from a number of bikes I have. The rims are from an early 90's redline bmx while the throttle controlls will be from an old italian motorized folding bike I had laying around (very nice quality.) Its a work in progress so far, I'll make sure to keep you all updated.[p][a href=http://www.geocities.com/kuroneko_34275/DSC00089.JPG target=_blank][img src=http://www.geocities.com/kuroneko_34275/DSC00089.JPG width=40 height=40 ][/a] by: 71.101.141.170 |
| And heres an idea of how tight it fits.[p][a href=http://www.geocities.com/kuroneko_34275/DSC00090.JPG target=_blank][img src=http://www.geocities.com/kuroneko_34275/DSC00090.JPG width=40 height=40 ][/a] by: 71.101.141.170 |
| Has anyone added a rechargable battery to the white wire to run lights and other electonics Horn Signals and such. If so I would like to hear of their success or failure. My bike is not a chopper but it is Hot, RED HOT!! by: 67.163.250.73 |
| anyone have any problems with the intake gasket? mine dissolved and i've tried making a new one out of gasket material from an autoparts store, but the only way i can keep it running is with the choke all the way on, and even then i cant give it any throttle. it just dies out when i give it throttle. any suggestions? by: 24.12.9.78 |
| Guys I read your posts with interest. I have a skyhawk 48cc on a MTB - commute 60km a day & have about 3000 or kms on the motor. Only major problem to date is that the plastic idler disintergrated at speed - luck I was suspicious of it & was carrying a spare for a road side repair. I am averaging 27 kms per hour - standard - I pedal alot though (:. Overall I find the motor primative but functional - daily general tightening required - not impressed with adjusting the chain daily - I really need to turf the idler & shorten the chain. I see u guys have higher output motors but I will not be buying another till my little one RIP's - however it is still going strong (:. I do have one question though..does any one know excatly how these units are governed??? Theres more power in a 48c 2 stroke that I know - but I have not figured out how they have "tamed" the motor, Any help would be great. Nice to see I am not alone with playin with these set ups lol. by: 203.41.44.242 |
| Seth, your gasket is not sealing, don't run it like that. I find that the green gasket material works fine, make another and tighten it correctly so it seats. Jo, the design of the intake and exhaust limits the motor. Casting flash, mismatching of the ports, and low compression does the rest. by: 67.77.59.134 |
| I've read Nathan's entry. I wonder if you are having good luck because/if your set up is absorbing more motor vibration than anyone else's. And were the only high quality dirt bike parts you bought the clutch lever and cable or were there other dirt bike substitutions which helped? Also, does anybody know whether or not changing the rev limiter will have a detrimental effect on the engine? I'm thinking of buying the 80cc, but some people I've spoken with think a two cycle isn't really meant to go on and on for hours without burning up--eight hours per day on an extended trip, for instance. I'm not really encouraged by much of what I've read here. by: 148.78.243.50 |
| HEY, I INSTALLED AN 80CC KINGS KIT ON A STRETCH FRAME BY FIRMSTRONG. THE BIKE IS HEAVY STEEL TUBING AND SO FAR ALL I'VE LOST IS CHAINGUARD AND REAR FENDER. THE MOTOR HOWEVER HAS SO FAR DROPPEDAN INTAKE GASKET WHICH I REPLACED WITH A HOMEMADE FROM A WHEATIES BOX, WORKS GOOD. HAD TO CUT THE MUFFLER OFF AS THE LEFT CRANK HIT, FABRICATED COPPER TUBING AND COPPER CONNECTORS TO FASHION AN EXHAUST SYSTEM USING THE ORIGINAL MUFFLER AT THE END. I GET STOPPED A LOT BY BIKER TYPES WHO GRIN LIKE CRAZY. IT HAS SOME LEAKING AROUND THE PETCOCK BUT OVERALL IT PERFORMS WELL. I PURCHASED A RHYNO-LITE REAR WHEEL W/FREEWHEEL SPROCKET... HEAVIER SPOKES AND A QUALITY HUB MAKE A BIG DIFFERENCE AS THE HUB WAS DESIGNED FOR THE STRESS OF GAS ENGINE POWER. THAT'S ALL I GOT. by: 71.200.10.9 |
| also, has anyone tried pulling any weight on a bicycle trailer with one of these engines ? I burnt out 2 40cc engines doing that sort of thing. by: 207.190.83.235 |
| a trailer will just be another stress factor on the life of the motor. The lower end bearings on the Stingray continue to be the weakest link, engine #3 seized while trying to keep up with some Moped Army guys on a long ride from Shawnee to Lawrence Ks. more R & D to come. by: 65.40.188.254 |
| Well I took out the old 80cc. Kings which has been in pieces for two years awaiting the spare parts that never came and started rebuilding it. The flywheel bearings were replaced with RBI 6202-2RS\C3 w/ the seals picked off. The bearing seats must be enlarged and deepened for them to fit.The needle bearings for the connecting rod are not available and the rod axle was shot, so a craftsman socket of the proper diameter was cut to length and I poured a 19th century style babbit bearing, which was then oil grooved and surface-laced with an ice pick. All of this was done with hand tools, except for a drill press used to plane the babbit bearing excess off. The engine was installed on the Stingray and ran around the block today. An exhaust system with a muffler needs to be fab-ed up before I do more testing. by: 65.41.220.85 |
| I just received a kit professed to be 80cc 2-stroke from power king shop on ebay. The CDI has a Black and a Green wire while the engine has a Black wire, a Blue wire and a White wire loop (no end). The four paragraphed, poorly translated instructyion I received didn't meation this configuration but I did find a useful link I'm surprised no one has meantioned here (maybe I missed it), http://www.grubeeinc.com/USA/STARFIRE%20%20SKYHAWK%20WEB%20INSTRUCTIONS.htm (the skyhawk 80cc seems to be the same general model) but alas it says to attach matching colors. It says to connect the kill-switch to white wire on the engine but doesn't meantion its a loop. I don't care to burn up the CDI with an incorrect gues. I could strip the whhite wire and solder the kill switch to it but should I ? It's likely that one end of the switch is actually connected to switch mount so that you're pulling the other post/wire to the bike .... BTW, the link is useful for carb and clutch setup and maintanence as well but doesn't address my CDI wire color problem. Thanks. by: 70.113.18.194 |
| Black to Black, Blue to Green, White to kill switch. by: 65.41.220.36 |
| Hello, I was wondering if anyone has tried to add some sort of derailleur system with multiple back sprockets to increase both speed and fuel efficiency. If so, I would be most interested to hear about it... by: 75.45.213.223 |
| i have a 80cc skyhawk with a centrifugal clutch and a friction clutch.. im also haveing major vibration issues and my friction clutch is slipping because i put oil in the gear as per the instruction that came with the engine, i want to remove the oil but to clean it out i have to take off the centrifugal clutch and i don't see how to do that... the other idea i saw was a torque converter princessauto carries if you want more performance and higher speeds if someone could fit that on there let me know by: 68.151.27.51 |
| I bought one of these Kings 80cc motor kits and I can't get the POS too start I have tried everything and nothing will work, anyone have any suggestions. Do i have a bad CDI? Is the white wire coming out of the motor for the kill switch or the black. Also the POS sparkplug connections won't stay intact maybe it's not getting spark? I dont know i'm about ready to throw the it in the trash. by: 71.208.222.244 |
| Hello, take unscrew the cap on the sparkplug itself. then you can fit the cap on correctly by: 66.116.58.29 |
| re: Keith - not starting If your oil mixture is too much oil, it won't start. Maximum oil is 3 ounces 2 stroke oil to a full 1/2 gallon tank, yielding about 20:1 ratio. The CDI might be bad. Mine is a Kings which totally failed after 3 months. I got a better one (used) on ebay. I start mine by going down a steep hill to get the rpm's up with half-way choke setting after 4 or 5 quick pushes of the primer button on the carb. by: 71.102.129.69 |
| In response to all the 80cc legality questions, I checked California law. As far as I can tell, 80cc is perfectly legal! I have no problem if you want to run 48cc, but 80cc is legal. by: 71.102.129.69 |
| Just got a 48cc kit. Any recommendations to increase life while assembling? What are my exhaust options or air filter options? If I change the filter will I need to rejet? Any input would be appreciated. Thanks. by: 76.168.127.57 |
| Just got a 48cc kit. Any recommendations to increase life while assembling? What are my exhaust options or air filter options? If I change the filter will I need to rejet? Any input would be appreciated. Thanks. by: 64.241.37.140 |
| I just ordered a 80cc kit from kingmotorbikes.com will it last me or will it just fall apart and break down all the time . is it reliable. by: 72.85.220.25 |
| I own a 78 Kreidler MP 9 and I am looking for some ideas on how to get a litle more top end out of it. It has to be in the engine side more than gearing because I live in Kentucky where the hills are crazy. It takes most all of them right now, but any higher on the gear ratio would screw that up. I am thinking about some carb, and exhaust mods. If I modify my Intake Manifold, I can put up to a 16cc carb on there. The stock is 12cc. If I up the carb, I think I should open the exhaust a little more. There are some performance exhausts out there for other mopeds that will bolt on there, I am curious as to what anyone would recommended. [p][a href=http://lh3.google.com/AdamTaylor15/R-yfH2F30HI/AAAAAAAAAR4/wYs5IAUpvxU/s400/Image017.jpg target=_blank][img src=the_camera.jpg][/a] by: 69.61.218.220 |
| I just bought an 80CC Kings Motor. I’m not the most mechanically gifted and the instructions seem to be lacking. I have a few questions maybe this forum can answer. I have a Firmstrong single speed beach cruiser. Challenges include: - Installing the sprocket on the rear wheel axle. We had the remove the metal brake bar on the axle so the sprocket/wheel could connect and able to rotate.. The brake bar would have interfered with the connection and rotation of the sprocket/wheel. By doing that, the bearing covers don’t fit (which is a problem) on and the axle spacing seems off.. Any suggestions? - Also, does the sprocket teeth face inside or outside. If inside, it looks as though the chain may interfere with the tire? If anyone has close up pictures of their Axle with the sprocket on it, would greatly appreciate seeing them. Please email to ben_culp@hotmail.com by: 72.197.67.145 |
| HELLO! I AM INTERESTED IN PURCHASING 1---80CC GAS MOTOR BICYCLE KIT. I AM STARTING A BUSINESS AND WOULD LIKE TO SHOW CASE THIS PRODUCT FROM YOUR COMPANY. THEIR IS QUITE A BIT OF INTEREST IN THIS PRODUCT, BUT IT WOULD BE A GREAT ADVANTAGE TO ACTUALLY HAVE ONE IN STOCK. SO I AM INTERESTED TO KNOW IF YOU SHIP TO POLAND BY MAIL (GROUND SERVICE) AND WHAT WOULD BE THE PRICE OF SHIPMENT AND ALSO WHAT IS THE PRICE OF YOUR 80CC GAS MOTOR BICYCLE KIT. PLEASE RESPOND TO MY QUESTIONS. WHAT WOULD BE THE TOTAL PRICE OF 1- KIT AND THE SHIPPING (TOTAL PRICE). I AM SURE THAT IN THE NEAR FUTURE YOU WOULD BE GETTING A MUCH LARGE QUANTITY ORDER FROM ME. AS I STATED THIS IS JUST A START. PAYMENT FOR THIS ORDER WOULD BE BY WESTERN UNION ----FUTURE ORDERS WOULD BE SET UP THROUGH MY BANK, BUT RIGHT NOW THAT IS IN THE PROCESS OF BEING SET UP. THANK YOU FOR YOUR TIME. AND I HOPE YOU CAN SEND ME THIS KIT AS I REQUESTED. SINCERELY MARIUSZ AND BOGUSIA KSIAZYNSKI by: 83.30.174.229 |
| i have a 49cc mini 4wheeler and my brother tld me that i can file down some needle to make it run a lot faster is this tru and where/how can i find this needle in my mini bike??? by: 75.138.187.9 |
| I just bought the kings motorbike 80cc kit-- i havent received it yet but after reading the postings i am worried- is it really they POS i have been reading about? what are some "kingsmotor specific tips" to keep the motor from blowing up? any other motors that i can in place without having to buy a new kit too? thanks by: 98.207.222.70 |
| FIRST PLACE OF REPAIR LOCATE AVAILABLE ROLLERBEARING CHAIN TENSIONER. NEXT I MODIFID STOCK CID IGNITION WHTH A SILICONE BULB PLUG END SOLDERED AND HEATSHRINKED CHANGED PLUG TO CHAMPION821M/L77JC4 FROM MY OUTBOARD MOTOR/FUEL MIXTURE40/1 I CAN EXCEED 4D MPH NO FOUL GAP AT 0/35 NO INSTRUCTIONS EVER SPECIFIED GAP THIS IS TRIAL/ERROR 10GAL OF FUEL NO PROBLEM KINGS IS WHAT I EXPECTED OUT OF DO IT YOURWAY CONTACT ME FOR TECH ADVICE AS NEEDED. by: 72.184.42.22 |
| FIRST PLACE OF REPAIR LOCATE AVAILABLE ROLLERBEARING CHAIN TENSIONER. NEXT I MODIFID STOCK CID IGNITION WHTH A SILICONE BULB PLUG END SOLDERED AND HEATSHRINKED CHANGED PLUG TO CHAMPION821M/L77JC4 FROM MY OUTBOARD MOTOR/FUEL MIXTURE40/1 I CAN EXCEED 4D MPH NO FOUL GAP AT 0/35 NO INSTRUCTIONS EVER SPECIFIED GAP THIS IS TRIAL/ERROR 10GAL OF FUEL NO PROBLEM KINGS IS WHAT I EXPECTED OUT OF DO IT YOURWAY CONTACT ME FOR TECH ADVICE AS NEEDED. by: 72.184.42.22 |
| I've used several small 2 cycle motors in various applications over the years. I'm now in the process of installing a 80cc Chinese 2 cycle motor into a Stingray Chopper, and I don't believe this question has been addressed. The instructions with the motor has the fuel mix @ 20-40/1. There is a synthetic Amsoil product marketed that shows a 100/1 ratio on the label that I've used successfully at 80/1 in several different motors. Has anyone tried something like this in these 80cc motors. I like to use it because there is very little, if no smoke from the exhaust. My last question is a recomendation for gear sets on the rear hub, Thanks......Byron by: 76.126.161.184 |
| I HAVE HAD MINE FOR MORE THAN A YEAR AND HAVE A GOOD 4000 MILES ON IT. I TOOK IT TO WORK FOR THREE SEASONS RAIN, SLEET AND SNOW. IT WAS A 30 MILE ROUND TRIP FIVE TO SIX DAYS A WEEK.I BOUGHT A HUB ADAPTER TO KEEP PRESSURE OF THE SPOKES, I TOCOED A WHEEL RIDING OFF ROAD. I HAVE A 32 TOOTH SPROCKET AND REACHED 43 MPH NOT GOOD FOR HILLS BUT I PASS CARS ON 35 MPH SPEED LIMIT ZONES.NOBODY KNOWS ABOUT THEM HERE SO EVERYONE LOOKS WHEN I DRIVE BY. I HAD TO MAKE A CLUTCH PIN OUT OF A HARDENED CARBIDE THE STOCK ONE WAS TO SOFT AND CLUTCH WOULDN'T ENGAGE, HAVE NOT HAD A PROBLEM SENSE, ALSO THROW AWAY SPARK PLUG WIRE ITS GARBAGE USE AN OLD CAR OR TRUCK PLUG WIRE JUST UNSCREW AND INSTALL MY STOCK ONE MELTED WHEN IT WAS TEMP REACHED 95 LAST SUMMER.IT ALSO HELPS TO GO FASTER WITH A 700C BIKE MINES AN OLDER GIANT CYPRESS TALLER TIRES ARE GOOD GET THE SPECIALIZED ARMADILLOS I HATE PULLING WHEELS FOR FLATS. I WAS LOOKING AT 4 STROKES BUT A MONKEY COULD WORK ON THESE MOTORS AND I LOVE THE SMELL OF 2 CYCLE OIL BONUS!WOULD BE NICE TO HAVE A CENTRIFUGAL CLUTCH BUT I HAVEN'T HAD A PROBLEM WITH MINE. BUY THE KIT YOUR LEGS WILL THANK YOU AS WELL AS YOUR POCKET BOOK WITH GAS SAVINGS. [p][a href=[a href="http://s734.photobucket.com/albums/ww344/death4of4/?action=view¤t=1up3tu.gif" target= target=_blank][img src=the_camera.jpg][/a] by: 99.145.124.50 |
| Wonderin if any one knows if they sell pulley for the 80cc king trying to make it like a whizzer, also how much harder is it to put the kit in on a smaller bike like the stingray or a 20" cruiser, than a 26" by: 205.241.134.53 |
| ok so i just bought an 80cc motor for my bike from kings, and the clutch doesn't work properly i can't pedal it as a normal bike it wont disengage from the engine. how do i fix this? by: 24.153.119.65 |
| Where do i get the kit to mount an engine on a stingray choppeerbike? ive got the 26 inch adult version of the more modern chopper type with the long tube type forks on it. by: 98.238.204.169 |
| I recently bought a zb80cc slant head i want to improve my speed and i read on a posting that you can cut the spark plug to make a dule spark. How deep? and i want to attacha 12v head light directly to the engine do i need something special or can i just connect i dont want to break anything. Can anyone help please?? by: 98.21.17.90 |
| THE MADISON CONSINEMENT SHOP 1316 MADISON SE IN GRAND RAPIDS MI. REPAIR AND INSTALL MOTORS ON SCHWINN STINGRAYS,CANNODAIL,NEXT SUPERSPING,21 SPEED HYBREADS AND MANY MORE. WE ALSO BUY STINGRAYS FOR PARTS AND RESALE. 616-248-9188 by: 76.249.22.203 |
| THE MADISON CONSINEMENT SHOP 1316 MADISON SE IN GRAND RAPIDS MI. REPAIR AND INSTALL MOTORS ON SCHWINN STINGRAYS,CANNODAIL,NEXT SUPERSPING,21 SPEED HYBREADS AND MANY MORE. WE ALSO BUY STINGRAYS FOR PARTS AND RESALE. 616-248-9188 by: 76.249.22.203 |