Cracked piston

[Jshep450r]

well title says it..i have a trx511r stroker and my piston keeps cracking..ive tryed a cdi, race gas, full break in periods and this still happens..this has happened 4 times so far and the piston is like 280 a pop..it is a wiseco piston no dome. 12.1 compression..what is going on?

[Scro]

Is the skirt cracking? Alot of people are having problems with the +3 hotcams cranks. Also, did you have the crank balanced to that piston? That could be your problem also.