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Discussion Starter #1
Hi.
I did a -1 front spocket mod and i would like to know if the indicated speed is less or more than the actual speed
 

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If you want an exact ratio, take the bike out with a GPS.

The percentage difference can be applied to correct your gauge at all speeds.
 

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With the -1 front sprocket and the inherant inaccuracy of the speedo from the factory, you will be roughly 10% off.

So at an indicated 150mph, you will actually be doing around 135mph or so.

Get a $60 Speedohealer and you are good to go.
 
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