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Old 04-24-2009, 05:00 AM   #1 (permalink)
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Join Date: Apr 2009
Posts: 15
Default What could cause a speedo to be out 1984 GS250

Hi
Im new to road motorbiking and this is my first road bike
its a suzuki 1984 GS250 FW

The speedo is out by a fair bit but its not constant its exponetial
at 50kph it says 60kph
at 60kph it says 73ishkph
at 80kph it says 100kph

the only thing i can think of that would cause this is a different size tyre in this case it would have to be smaller than the original
as far as i know its the original size its definitely the original rim and the tyre is allmost new

how can i fix it?

any help appreciated greatly
from Doug