Starting new engine build

old motorbike · #1 03-15-2009, 09:48 AM

I just recently finished an aluminum frame bike build. Works good, but vibrates worse. Went 38 MPHwith shift kit.
Just saw a mini 4 wheeler at another nearby shop being tested by a worker. The motor was smooth and high revving with a pull start. Lots of power!
I just ordered one with trans & auto clutch for $79. free ship. Going to try that route. Might be a lot of work to adapt?

I may have a lot of parts for sale later, if it works.

toytime · #2 03-15-2009, 11:46 AM

That sounds like a great deal. Can you tell us were you ordered it from? A link would be nice.

old motorbike · #3 03-15-2009, 05:37 PM

eBay Motors: Pocket Bike 49cc 47cc Motor Engine and Carburetor NEW (item 390033713111 end time Mar-27-09 08:19:18 PDT)

toytime · #4 03-15-2009, 05:49 PM

I don't think it will be a lot of work and I wish you well on this build. Sure it may take a day or two to get mounts made up but once the engine is sitting in place it will be no harder than those of us with frame issues or the OCC Choppers types of build.
I'd like to do one with a 4-stroke Honda 50 with the 3 speed. That would be so nice and quiet.
I can't wait to hear about your project!

brisbane_boy · #5 03-16-2009, 07:38 AM

i wish you luck with this build.
The good thing about those motors are that gettin performance parts is real easy.
Good luck
Duncan

toker_ace · #6 03-16-2009, 07:51 AM

Keep us updated. I've looked at doing one of these for a long time.Here is a link to a video on youtube of a guy that built one with a cvt tranny. I don't think that type of motor will fit between the pedals. here's the link YouTube - Motorized Bicycle with CVT Drive ETON 41.5

**Norman** · #7 03-16-2009, 02:22 PM

hey there would be an engine for powering up a light generating system just an off the wall thought.
If you got stopped all you would have to say is it powers my lights but then 2 engines would look a little strange but aren't we all a little strange?

very nice find by the way.

old motorbike · #8 03-21-2009, 03:30 PM

Just received my new motor. Sure is small and light. Will need to make some mounts. Gonna run a single sprocket on the left. might take time to mount, but will be smooooth.

NEAT TIMES · #9 03-21-2009, 05:13 PM

Old Motorbike, Thats A Good Price With The Trans. I Have Several Of That Setup. The Chain Box Sprocket Turns Same Rotation As The Motor. The Gear Ratio 3.25:1. Dax Sells A Flat 10 Tooth 1/2" Pitch 1/8" Wide Sprocket For $4.95. That Way You Can Use The China Girl Rear Sprockets. The Sprocket On His Titan Kit Would Be Much Better, But He Has None!! I Bought Some, Out Of Stock, Waiting For My Refund. The Cheap Mufflers Are Hard To Find For Those Engines. The Happy Time Motors Are 4.1:1 By My Calculations. Anybody Have A Different Ratio Figured?? As You May Know, The Trans Can Be Rotated To A Different Position. All The Pocket Bike Motors And The 35cc Honda Etc Bolt Up To Most Of The Different Gear Boxs And The Cvt Belt Drives. I Am Going To Use 8mm Chain And Freewheel Sprockets, Waiting For Order Now. Planning On Rear Rack Mounts. Looking Forward To Your Builds. I Have 3 New Belt Drive Cvt Set Ups That Will Be Rite Hand Rack Drive, With A Freewheel. Later . Ron