Change gear ratios?

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    Al YOUNG

    Has anyone changed the rear sprocket? as a mainly on road rider I think it would be nice to up the gearing a bit but not sure what size rear sprocket to fit…

    martin G10

    Hi, Al
    The original 150’s ran 15/43
    with 19″ wheels
    The standard gearing on later models changed to 15/40 with the 19″ wheels,
    some Foggys have 17″wheels , somebody mentioned a minimum of 38teeth on the rear (can’t rember who !).
    My six is running a mitus 130 on the rear instead of the 140 , for a better tyre profile , with its smaller circumstance I changed the gearing to 16/40 for mph16.126 per 1k rpm , a tiny increase over standard
    (The front sprocket chain guide only fits 15t) take a look through the screens on the Speedo (saved maximums) to see what your mph / rpm
    works out at .
    regards martin

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