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Tach ratio for dime city speedo tach kit?

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    Tach ratio for dime city speedo tach kit?

    Looking at dime city speedo kits. It lists them in different ratios. 2:1, 1:7, 1:5, 1:4. The speedo says 60 km=1400 rpm so this ratio is for the tach I assume. Anyone know which ratio to get for a 1978 gs550?

    #2
    Pretty much all japanese bikes have 60km/h:1400 rpm (1400:60) and 60 mph:2240 rpm (2240:60) depending on what unit you want your speed in

    For the tach ratio I *think* it's 4:1 - at least that's what I bought after researching as best I could. I'm yet to install it though.

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