rpm's?

I have the follow on the motor. • 6.5 clone motor with governor & low oil shut off removed • Honda carb 200 max bore with .98mm jet & UNI air filter • Aluminum flywheel with 4 degree of advance timing • Billet rod, stock piston & rings • Gx160 head 14cc • Stainless valves...

What would the highest rpm of a stock 6.5hp Honda clone? I can't seem to find it any where. Also, what would be the highest rpm for one that has the governor bypassed without stiffer valve springs? Thanks. Clayton

So, I figured most small engines rev @ 3,600 RPM. Anyway, I've tried numerous calculators and two GPS's and still my DB30 with a stock Predator is getting 33 MPH - uphill and on level ground. The calculators say this would require 4,500 RPM's, so what gives? The tires are stock; the rear...

Hey everyone, I have a 6.5 HF clone with the governor removed. Since I don't have a tach what rpm's do the valves start to float on these engines? And what kind of rpm's could you get out of a stock camed engine with 18lb springs? Any dyno charts by any chance? And yes I know I'm going to...

What kind of rpm's can the GX390 turn with the stock valve springs and no governor? I was using this to get a rough idea of top speeds: http://www.minimotogarage.com/ecm_speed_calc.html