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Originally Posted by nero
if going down on the front sprocket 1 tooth is harder on the chain (tighter radius) and affects the speedometer accuracy then will going up 1-2 teeth on the rear sprocket screw up the speedo too ?
what drives the gsxr speedos ?
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Yes changing the front will screw up the speedo even more on the GSXR about 10 mph high according to my GPS. Going up on the rear has NO effect on speedo but the OEM speedo is about 5~6 mph high stock. The GSXR reads from a magnetic pickup off the front sprocket cover. My V-Strom 650 however reads from a pickup on the front wheel so it was not affected by a front sprocket change but there again it was wrong stock to begin with. There are electronic devises to correct the speedo but who cares about the small details, I know I don't.
Its not like I'm about to cross the country on the thing.
