Re: clocked at 38mph today
Reed valve intake is better because the intake is open for part of the piston down stroke with piston porting, and this causes lower case pressure because some of the charge is pushed back out to the carb. At lower rpm, some of the intake air is pushed back and forth in the carb causing it to be too rich. A Reed valve is a one way valve that stops the pulses from exiting the crankcase. They limit high rpm power somewhat, but it wouldn't be noticeable at the rpm China girls should see. It will greatly increase lower rpm torque.
some people say that a motorbike defeats the purpose of a bike. i tell them to get a flintstone's car.