MOTORIZED BICYCLES:   baby mosquito posted by: keats on 4/6/2006 at 1:03:33 PM
Any one know the recomended gas oil mix for garelli baby mosquito?thanks

AGE / VALUE:   Solex Motorized Bicycle posted by: Dawn on 4/4/2006 at 4:38:50 AM
I acquired a vintage Solex yesterday. How can I find its age and value??

AGE / VALUE:   Solex Motorized Bicycle posted by: Dawn on 4/4/2006 at 4:38:50 AM
I acquired a vintage Solex yesterday. How can I find its age and value??

AGE / VALUE:   Sear bike motor posted by: nate on 3/29/2006 at 1:19:41 PM
Is anyone familiar with the Sears bike motors that sit over the front wheel of a bike? I think it is called a Free Spirit. I can buy one, not running for $20. Should I? thanks

   RE:AGE / VALUE:   Sear bike motor posted by JimW. on 4/5/2006 at 3:22:17 AM
Nate, That engine is also known as the Tanaka Bike Bug. Mike Schneider is the expert around here on the subject. He must be on vacation. Information about Mike and Tanaka at:

You can probably find a running one on eBay for a reasonable price. A non-running one for $20 may be a bargain, but it might not be, if it needs an expensive rebuild.

   RE:AGE / VALUE:   Sear bike motor posted by Mike Schneider on 4/30/2006 at 1:05:17 AM

Depends on condition of it and what you want to do. $20 for an engine of any type if it is semi good condition is a deal. You may have to put money into it to get it running. If you don't want it - let me know about it.

Below is Litertaure & Parts for that engine. I am a Tanaka Parts Distributor na d can help you put that engine together.

Literature & Parts

These little bike engines are really a HOOT. I have two mounted on mountain bikes and six on cruisers. They are such fun and real head turners. They are simple to work on but were designed by Japanese engineers so sometimes the why that way is interesting.

I remember seeing them in Popular Science as a 12-year boy - dreaming about having one. Three years ago I found one at a garage sale and rebuilt it - took me about three months - no manual, parts lists or diagram - just trail and error.

I finally found a man in New Jersey who had one who had a manual and experience rebuilding these engines. We became and still are long distance friends. Once I got that engine running and rode it - I was that 12 year boy again - What a Blessing.

I have since rebuilt eight engines and in the process of networking I have gathered an extensive amount of literature and experience plus figured out how to built or find parts that are better than original and cost less.

The Information Literature $25.00

· TAS Spitz, Aqua Bug Bike Bug, and Sear Free Spirit
QBM 23 and QBM 23 NA and QBM 23 Auto
· Owner's Manual
· Shop Repair Manual
· Original Advertisement Literature
· Manufacturer's Operating Tips
· Governor Removal Instructions (0.8 6000 RPM to 1.2 HP 7000 RPM increase)
· Technical Diagrams
· Parts Catalog
· Parts Lists
· 1977 Popular Mechanics Article (How To Motorize Your Bike)
· Collection of TAS Spitzs, AquaBug Bike Bugs, Sears Free Spirit Bike Motors featured in Tanaka Bike Motors – “America Favorite Bike Motor” July/ August 2002 Issue of BikeRod&Kustom Magazine and check the achieves for Tanaka Tales.

Parts we have developed are:

· Drive Roller Wheel (62mm - Faster, less wear, less expensive than original replacement)
· Safety Gas Tank Cap
· Fuel Pump Kit
· Muffler to Submuffler extension hose
· Mounting Kit for New Model Bike (5 ˝” forks versus older 3 ˝” forks)



Drive Wheel $20.00

The Drive Wheel is another item that has been improved on design. The rubber of the drive hub simply deteriorates with age and wear. We have put a neoprene high-speed roller skate wheel (62 mm) over the aluminum drive hub. It wears less, vibrates the engines less and bike goes slightly faster per revolution. This drive hub wheel sells for $20.00 ready to mount over your existing aluminum hub.

Gas Tank Cap $10.00

The Safety Gas Tank Cap sells for $10.00 and has a safety-retaining ring that prevents loss. The ring slips over the gas tank neck and stays in place when the cap is removed to add gasoline. An original gas tank cap that does not have the safety ring can be bought from Tanaka for $15.00 plus $4.95 for shipping and handling.

Fuel Pump Kit $12.00

The pump gasket, diagraphm, and free valve with instructions and hints to make this replacement of parts go correctly (Parts being misaligned – pump will not function) with minimum time and lost of small pieces. These instructions are in addition the owner’s manual and workshop manual.

Foot Valve Kit $15.00

This kit is a fuel filter and one way check valve combination mounted in the gas tank suction line that keeps the fuel pump primed.

Muffler to Sub Muffler Extension Hose $20.00

We have researched and experimented with various arrangements and have developed a wire reinforced high temperature hose that with stand the high temperatures developed by the engine. The current hoses we are selling have lasted for two years.

In ordering this hose it is important for us to know the size hose you need. The models have changed over the years and this hose size has increased on later models.

This part is no longer available for Tanaka.

Mounting System $15.00 - (5 1/2” forks – Newer Model Mountain Bikes & Cruisers)

The bikes made when these engines were made had 3 ˝” wide forks – newer mid 1980s mountain bike and cruisers have a 5 ˝” wide fork.

The Kit comes with the hardware and assembly directions to spread the mounting bracket apart to be able to mount the engines on bikes with wider forks than bikes had when these engines were built.

Other Parts

Some original manufacturer parts are available from Tanaka and Sears - no manuals though. My literature is from people like you and some from old but new in the box engines I have purchased. Also a lot of parts can be obtained form lawn mower and motorcycle shops.

I have large odd lot large parts from engines that were in various stages of repair from a Sears Serviceman Estate. Tell me what you need from the parts list and we will see if we have one or can built some.

Sears and ACE Hardware are good sources for gasoline hoses, air filter and metric nuts and bolts.

Replace the original transmission grease with Lithium base grease - wasn't available when these engines were made. It lubricates better and you get a little more power to the wheel.

Synthetic 2-stroke oil (Bel Ray available form most motorcycle shops for racing 2 cycle motorcycles) in the gasoline - it lubricates better, engine runs faster, smoother and does not have carbon build up in the muffler.

Anyway, I can help you on rebuilding and mounting if you have specific questions after your review the information.

The literature I can copy and mail to you for $25.00 in the US. Send a check to - Don't waste money on a money order:

Mike Schneider
1307 Country Place Circle
Houston, Texas 77079

Thanks allot and hope you have the wind in your face soon.

BTIW (Brothers In The Wind)



   RE:RE:AGE / VALUE:   Sear bike motor posted by phillip colella on 5/14/2006 at 3:01:45 AM
I have a sears free spirit on an old cruiser of mine and it quit running about a month ago it didn't seem to be getting fuel so I dis assembled the fuel pump and the diaphram looks worn out I was wondering if you knew how I could obtain one of these I really want to get it running again, I wish the parts weren't so hard to find it's just a shame to see it sitting broken. Any help would be greatly appreciated Thanks Phil

   I NEED A FUEL PUMP KIT posted by jj on 5/31/2006 at 4:07:19 PM
I have a aquabug and need a fuel pump kit to make her live
again,The price of gas makes it a top priority to complete
my project.

   RE:RE:AGE / VALUE:   Sear bike motor posted by mitch on 6/21/2006 at 5:59:43 PM
I need info for a WETT motor (locomotive) amsterdam

   aqua bug roller posted by jim sadler on 6/24/2006 at 9:20:35 PM
where can I purchase a new roller for my aqua bug engine?

Jim sadler

   RE:AGE / VALUE: Sear bike motor posted by jim sadler on 7/10/2006 at 2:00:49 AM
I would like to purchase fuel pump kit for my aquabug bike engine.
Is it avaliable?


jim sadler

   RE:AGE / VALUE:   Sear bike motor posted by Rob K. on 7/18/2006 at 3:10:18 PM
I finally got around to repairing the friction roller wheel for $2 on a Free Spirit motor. I must also admit, I got the idea from a guy at a Bicycle show.

First, I removed the roller from the motor, and wire wheeled all of the plastic crap that breaks off. I found radiator hose that fit on the thing snug and used some 3 minute Loc-tite epoxy from Wal-Mart. After the first one was dry, I installed a larger second piece of radiator hose right over the first. After this dried, I trimmed the ends and reinstalled the thing on the bike. It works very well.

I’ve also figured out that a good working primer bulb on these is critical to getting all of the fuel circulating through the carb or it WILL NEVER START. So if you remove a carb to clean it, lube the black primer bulb with something so it doesn’t crack. When you squeeze it, it sould criculate fuel through the carb.


   SEARS CAN U HELP ME??? posted by LON on 10/29/2006 at 8:20:42 AM

   RE:AGE / VALUE:   Sear bike motor posted by marshall on 6/12/2007 at 11:02:12 AM
hey looking for parts for a free spirit front engine have it on a 3 wheeler huffy would also like to find fenders for tht and wheels

   RE:AGE / VALUE:   Sear bike motor posted by Thomas on 8/6/2007 at 6:55:53 PM
i am looking for a couple of parts for my bug bike. first i need either a new roller wheel or another way of replacing the wheel. the other part i need is a fuel pump to get the fuilds pumping again any info to help would be great.


   RE:AGE / VALUE:   Sear bike motor posted by Jojo on 11/1/2007 at 5:42:44 AM
Just picked up a complete Sears model # 298.488510. engine has serial # 886514 , thanks for the info , the possibilities seem endless! Im thinking of ways to mount it on my Trikke , among other things! ' Jojo

   RE:RE:AGE / VALUE:   Sear bike motor posted by andy on 2/18/2008 at 11:55:40 AM
i hahe a free spirt motor that needs a drive wheel carb rebuild and primer bulb

   RE:AGE / VALUE:   Sear bike motor posted by jake on 8/15/2008 at 5:46:52 PM
i need parts for free spirit motor mostly the wheel that runs on front tire can anyone tell me where to order one thank you

WANTED:   pre 1940 bike motors and parts posted by: Roger on 3/14/2006 at 5:26:43 AM
I collect early bike motors, Many of them are cast iron and very heavy, They are not very practical by todays standards. I have run across some odd balls like Earnshaw road arrow, Steffey, Johnson, Solex,cyclemaster, BSA, Whizzer,Briggs & Stratton motorwheel, Smith Motorwheel,Dayton Motorwheel, Merkel Motorwheel to name a few. If you have one of these you will part with I sure would like to here from you.
or 510-797-4000 is my message line.


   RE:WANTED:   pre 1940 bike motors and parts posted by Bundy of shire on 6/25/2006 at 8:10:29 AM
hey neighbor sorry no motors here but its nice to know someone close to home is interested in these we may have mutual friend Chuck Reisen rind a bell?

   RE:WANTED: pre 1940 bike motors and parts posted by Larry Wlos on 4/2/2007 at 7:38:47 PM
I have new Travis , Whizzer 700,new Marman 1948