My latest build. This is the sweetest of my friction drives(I have 4). Very easy build, but the devil was in the details. This is my second Lifan 2.5, I cant say enough good about these engines. Quiet, smooth and powerful. They are not as cheap as the HF engines, but are more compact and bike friendly being up right. This one is driving through a 2" roller, theoretical top speed of around 28mph@ max rpm. I have left this one governed in the interest of test running it, and believe I will leave it that way. Once under way, you just open the throttle wide open and she eases along around 23mph. The governer handles the hills with no problem. No need to constantly adjust a twist grip. The overall ratio is around 14:1 so its a very good hill climber. In the interest of low CG I moved the engine foward, the muffler got pretty far foward and I thought I might need a heat shield or deflector, but there is no heat at all from it. The last thing I need to do is change the ratio of the clutch pull as it drags slightly at idle. That my only complaint. The total cost of this build was $115.00, not counting the 10yr old bike.
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