Each product has a "specification" section on its page with piston-wall clearance and rings end-gap.
These recommendations are based on our own experience and take into account possible working conditions and the likelihood of overloads.
You may deviate from the recommended parameters if you predict the operation of your engine beyond the generally accepted parameters for the engine.
First start is the main event in engine's life, do not put any load on engine before it reaches operating temperature.
Please consider breaking-in mileage for at least 1500 km.
Pistons are warranted until the first start of the engine.