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  1. 640 to 660 Engine swap

    Supermoto
    Does anyone have any advise about putting a 660 engine out of a rather bent desert racer into my 640 LC4 S/M? Is it doable and how much of a performance increase would I be likley to see? Are the service intervals on the 660 a pain after getting used to the nice easy 640? In general if anybody...
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