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Motorized Bicycle General Discussion All topics regarding bicycles with engines.

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Old 09-06-2009, 02:35 PM
flatracker flatracker is offline
Motorized Bicycle Newbie
Join Date: Sep 2009
Location: Wasnington state
Posts: 2
Default Will this frame fit a 4 stroke

Would prefer a 4 stroke engine, but not sure if it will fit into this Schwinn mountain bike frame. The frame is all steel which helps.

New on this site so any info will help. Raced and built motorcycles for years, both 2 strokes and large twin flatrackers, but cant seem to find the dimensions on the engines. Looks like it would be a tight fit but really like the frame.

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Old 09-06-2009, 03:26 PM
ocscully ocscully is offline
Motorized Bicycle Elite Member
Join Date: Jan 2008
Location: Orange County, CA
Posts: 373
Default Re: Will this frame fit a 4 stroke

Here is a link to a pdf of the install manual from bicycle-engines .com page #3 has the info on how to determine weather or not their kit will fit your frame. When I was first looking for a bike to install a 4-stroke kit in I made a 10" X 10" cardboard square. If you can fit this square generally upright into the front triangle then the 50cc 4-stroke kits will fit.


Last edited by ocscully; 09-06-2009 at 03:30 PM.
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