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The only restriction i belive these bikes have is an exhaust restriction. Best bet for more power is to scrap the original exhaust and get a straight through exhuast, change the main jet in the carb for a 110 or a 120, remove the lid of the airbox (or drill two extra large holes in the top of the airbox) this will improve airflow, finally you can remove the head gasket and replace it with a silicon gasket cement to increase the compression ratio. (MAKE SURE THE VALVES DO NOT KISS THE PISTON) that should get you going =)

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12y ago

What else can I help you with?