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Old 07-05-2019, 08:36 AM
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JTSpeedDemon JTSpeedDemon is offline
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Yup, 6.25/1 ratio.
Top speed on the DIYGK calculator is 33 mph, so I don't know how you're getting 40!
Is that just a guesstimate, or is it GPS/speedometer verified?
I would get a bigger sprocket for sure. Probably a good place to start is a 60T, as they're very common.
That'd give you 7.5/1, and with 19" tires and a *cough* heavy rider, I think it should still remain manageable, especially with a stock engine.
Currently Flathead-Crazed