powervalve brake-in

[bobby bo]

i just changed the piston on my powervalve motor. whats the best way to brake it in. i have read the ones that duncan racing has on his webpage. but i dont have a fan. thanks

[methyman]

I personally breakin all 2 strokes the same way. I use 3 heat cycles on the piston. I start the bike up and drive it not using full throttle just part throttle shofting through the gears. Get the motor warmed up and let engine completely cool so it s cold to the touch.(cylinder). Do the warm up process 2 more time and after the third cool down I let her rip. Good Luck! If you have a fan you can speed up the process.