My HF 52 cc HF Mitsu clone is showing steady improvement, after about 7 hrs since new, it hit 34.5 MPH with 240 lb rider (my son Greg). Calculated RPM with BMP friction drive 1.25" BMP roller is 9000 RPM pulling 300lb load (240 lb rider + 40 lb bike + 9.00 lb engine + fuel + BMP kit.
I find it kind of impressive (engine and kit) not my expertise since this is my first built.
This is a stock engine without any "works".
As 5-7HEAVEN suggested this engine may like more a 1.5" roller. He is right, this thing burns the tire with 1.25 roller, with a lighter rider (below 200lb) and 1.5" roller this thing will go well over 40 MPH, so all you speed demons take notice, $90 engine and $159 kit would get you in 40 MPH club with no fancy extra stuff.
Who knows how fast it would be with shift kit LOL.
Personally I am not going for 1.5" roller, my goal is still to build a dependable tree climbing set-up.
I find it kind of impressive (engine and kit) not my expertise since this is my first built.
This is a stock engine without any "works".
As 5-7HEAVEN suggested this engine may like more a 1.5" roller. He is right, this thing burns the tire with 1.25 roller, with a lighter rider (below 200lb) and 1.5" roller this thing will go well over 40 MPH, so all you speed demons take notice, $90 engine and $159 kit would get you in 40 MPH club with no fancy extra stuff.
Who knows how fast it would be with shift kit LOL.
Personally I am not going for 1.5" roller, my goal is still to build a dependable tree climbing set-up.
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