My dad just ordered a wisco pro x lite piston. Has anyone tried these in the past? How do you like them? Is there any power increase from the stock piston? And how do you break it in?

1995 yamaha blaster with some mods

 

I am running one now. Alot of people are going to tell you they go bad quickly, but they don't. Weisco pistons love a very long break in time. Go to duncanracing.com, then to their tech page. They have a good break-in procedure. It doesn't add alot of power, but it can rev a little faster.