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  1. Sprockets and Pulley's and Belts, oh my!

    Gilroy Indian Models
    I am interested in lowering my S&S88's RPMs at highway speed in an attempt to reduce vibration. So I have read a bit about overdrive transmissions... from a Jims Fat-5, OD6 to DD7, etc. What have you done, if anything, and why? Could not the same thing be accomplished using a judicious choice...