Join Date: Jun 2006
Location: AZ, Green Valley
Many motorcycles with newer designs feed the speedometer info from the transmission. IIRC a device called a Speed Healer is sold to fix this problem when different sprocket sizes are used.
I had a CB500X which had the speedometer go from "right on" to 5% below the true speed because of changing the rear sprocket from 41 teeth to 39 teeth.
John '09CRF230L (L'il Red Piglet), '89NX250 (sold), '01Rebel (sold), '14CB500XA (given to son)
Nekkid bikes feel faster