Quote Originally Posted by jmmx258
From personal experience CP pistons are not worth the money they go for. I ran into the same exact problem with my dirtbike. I had their 14.2:1 piston in my KXF 250. Took it to a LL Am Nats qualifier, and lunched it in practice. As it turned out their skirts are their weak point. My piston rocked in the cylinder and now I need complete head and cylinder assembly. Either way, GREAT build!!! Sorry to see you hit the same CP piston curse I, and a few other people I know have run into.
I've heard from a few other guys with CP k-series stuff that they've had skirt problems. At this point, I don't know if it's b/c their spec sheet clearance is too loose or if it's just a weak point in the design.

I do know that from now on I'm going to stick to 4032 for street motors b/c of the tighter piston to wall you can get. Anytime you can reduce the piston to wall, the longer the motor will last.