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Discussion Starter · #1 · (Edited)
I have a error code that reads c91 on my k8 600. Mods to the bike are full race exhaust, PC3, and bmc filter. 9500 miles first error code and mods where done a while ago.

Saw somewhere it might be linked to speedometer, is this true and if so what should I be looking for or checking. Bike runs and rides fine and the speedo works fine also.

Thank You in advance!
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