tblazer:

Wiseco Pistons, have very specific breakin procedures, if you follow them to a "T", then you will have the best of luck with them...Wiseco Pistons are sometimes called Skull Wall Pistons, the reason they are called this is, that they are very thin walled Pistons, Weight is the key to thier success and or their downfall. If a person does not follow their breakin procedures to the "T", then you will most certainly have failure!

 

I have 2 seasons of mx racing on mine an have no problems. My piston is also modded for the reedcage conversion. It still beats 240blasters in hole shoot for mx racing so wiseco piston are good. I was told for them all you need to do is acouple pass with it an then run it normal.