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| Wiesco builds our 81mm piston and we added more skirt to help stabilize the piston in the bore. By adding more skirt we feel that our piston will have a longer life than the stock piston. Our 81mm piston kit has a compression ratio of 12 to 1 and will need to run 93 octane or better.The 270 kit give better botton and mid while still allowing the motor to rev like a stock 250. The complete parts kit includes 81mm piston kit 81mm sleeve (installed in cylinder) Top end gasket kit Jetting kit Oil filter |
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