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Old 11-10-2014, 06:14 PM
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Zman Zman is offline
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Location: Burbs of Chicago
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Thanks for the input on the lever feel.

RE Big Bore - Eric Gorr did a custom big bore kit for me around 2003. 76mm was about as big as we could go on the GG 300 cylinder. It was really close and did not leave much margin between new bore and the inner head o-ring groove. Here is some more info on it. http://www.thumpertalk.com/topic/751...s#entry7882216


The 76mm piston is a Wiseco from Eddie Sanders Racing part number 11505M07600. Wiseco will not sell them to you directly. The application is a big bore for an Honda ATC250. You will need to clearance the bottom of the piston to clear the cases and to match the case transfer port side windows. You will also need to cut down the power valve to clear. Last but not least you will need to weld and recut the head.

http://www.eddie-sanders-racing.com/...ston-kits-.htm
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