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Old 09-11-2016, 01:14 AM
TheNecromancer13 TheNecromancer13 is offline
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Default Might try to build a 125cc Lifan bike

So I currently have a single speed 79cc predator bike that can do about 40 on level ground, but I would like a bigger, higher quality engine. I was thinking the 125cc lifan would be cool to build a bike out of because of the built in 4 speed transmission. Only thing is that the engine is about 17" long, so I'm not sure how to go about finding a frame that it would fit in... anyone have experience with this engine? Tips, tricks, frames that work, etc.
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Old 09-11-2016, 12:05 PM
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WECSOG WECSOG is offline
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Default Re: Might try to build a 125cc Lifan bike

I have experience with the engines, but not in a bicycle frame. I have seen some builds on here using the Honda clone horizontal engines, though.
Here's a tip that might help, though: I would forget the 125cc and up engines because they are wider (bigger clutch pack) and longer (because of the longer stroke) than the true Honda clones. Most of the 110cc and smaller are true Honda clones with the same exterior dimensions as a 50-70cc Honda. They have quite a bit of parts commonality with Hondas, too.
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Old 09-12-2016, 08:57 PM
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Ludwig II Ludwig II is offline
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Default Re: Might try to build a 125cc Lifan bike

This thread has useful info on building with Lifan and other clone CG125 engines:

http://motorbicycling.com/showthread...334#post644334
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Old 09-12-2016, 09:36 PM
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WECSOG WECSOG is offline
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Default Re: Might try to build a 125cc Lifan bike

Quote:
Originally Posted by Ludwig II View Post
This thread has useful info on building with Lifan and other clone CG125 engines:

http://motorbicycling.com/showthread...334#post644334
That's quite a feat, fitting a CG into a bicycle frame. I have an XR100 engine that I'm not using; perhaps I should look for a frame to put it in.

I'm currently in the process of building a CG200-engined '72 XL250.
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Old 09-12-2016, 09:42 PM
TheNecromancer13 TheNecromancer13 is offline
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Default Re: Might try to build a 125cc Lifan bike

Well, I've decided to try it! I ordered the engine and a micargi puma stretch cruiser off amazon today, once those arrive, I'll figure out what else I need. I'm going to upgrade all the parts on the puma and figure out how to do disc brakes on both wheels. I plan to run the chain over onto the right side of the bike using a jackshaft, and add a freewheel so the pedals won't spin all the time. I'll probably have custom sprockets made so I can just use 41 chain on everything. So exciting!
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Old 09-15-2016, 07:11 PM
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Tony01 Tony01 is offline
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Default Re: Might try to build a 125cc Lifan bike

Don't use 41! Use 420 instead. For the same size sprockets but way stronger.
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