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piston slap

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hey guys can piston slap cause the top end to blow, i have a forged wiseco piston in it and bout 40hours on the piston, yes i ran the last piston for the same amount of time and no probs, i no ye say theres a limit on pistons but i am gonna run it for another while,

Thanks

Colin

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You sure that what you are hearing isn't your chain slapping around?

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Piston slap can snap off pieces of the piston which will most likely wreck your top end and possibly more. What bike do you have? if it's a 125, it should be replaced asap but since you have piston slap, it sounds like it should be replaced anyways. Or it could be your cylinder is worn.

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+1 on the cylinder worn, did it measure in spec when the top end was done? I would tear down top end check piston and cylinder measurements and rering the piston ,if all is in spec. 40 hrs is about all i would put on rings. I'm sure others will tell you different but I had a ring failure at 60 hrs so I have learned my lesson the hard way.

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