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piston size question

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im replacing the top end on my 03 rm 125, i had the shop size the bore and they said it was 56 mm, the stock bore is 54...so i need a .020 oversized piston kit right??? or am i needing bigger???

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Sounds like you need a +2mm piston. The Wiseco part number would be 754MO5600. Not sure if O.E.M makes an oversized piston.

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+2 really??? i cant find anything like that...hmmm, ok well i called motosport and they said .020, my shop said .080 would equal the extra 2mm....can anyone confirm this

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