what is, and what does a power valve do on a 2-stroke? i have no idea about it. anyone got any info?

 

Now I know, so should you

 

it alters port timing in a motor. Usually they are operated by suction or electrical. Basically a power valve raises and lowers the port timing depending on the motors RPM causing a stronger midrange at low RPM's and a stronger topend and higher RPM's. best of both worlds for MX, ive yet to see a benefit with drag racing so far.

 

thanks everyone