Sidewinder Jerry
Well-Known Member
What size wheels do you have?
Here is the specs on the OP engine:
Specifications:
45.7cc High Output Race Engine
Horsepower 4.20HP at 18,000 RPM
Torque = 2.315 lb-ft (0.32 kg-m) at 8,000 RPM
Includes fabric air filter w/ anodized aluminum protective shroud
The kit he's using has 2 roller sizes 1" and 1.25". If the stats on the engine are true at 3/4 throttle that would be 13500 rpm which would propel the bike 40 mph using 26" wheels and the 1" roller.
This seems like way to powerful of an engine for a friction drive system. Tires wearing out quickly. Potential blowouts I don't even want to think about that one at 40+ mph.
I agree. 101%
I am suspicious at anything over 25mph on a stock Chinese bicycle engine.