When have I to change my piston?
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It depends on the cylinder kit you have fitted and on what kind of races you take part in. Generally a standard cast iron cylinder the piston lasts 5000/8000 km. The cast iron racing type can last 3000/5000 km, the evolution aluminium ones 500/1000 km. If your engine has been tuned up to take part to the Polini Italian Cup you have to change the piston every two races.
