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Piston identification

Need help with a tuning kit, how do you tune your scooter, which kit should I choose, and all general tuning and modifcations questions are for in here.
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Piston identification

Postby jonno » Thu Apr 20, 2017 7:52 pm

I have a ts1 with cr250 piston fitted.It needs a rebore,I think as the honing marks are getting worn away around the exhaust port. The numbers on the piston crown are A7IE3 std 431 PS. Does anyone know what they mean? The barrel was done in 2000 and I need to know which piston to get,having no luck on the net. Cheers in advance.
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