For those who wonder if higher power output will provide them higher speed or velocity:
Just shows max. speed (not acceleration) is not dependent on the power you draw out. Speed of a vehicle (this time a motorbike) is a function of engine radial speed (rpm), tire specs and gearing....
Dyno run from a modified CR500:
- Max power at the wheel = 89 hp, or 66.5 kW
- Max torque = 66 lb(force)-ft, or 89.6 Nm
- Max velocity = 136.5 km/h
A stock YZ250 makes around 47 hp with 31 lbf-ft of torque. With the stock gears on at 9600 rpm just before signing out it makes 120'sh km/h. Change the gears to a wide-ratio, it will make above 140'sh km/h.