i have a 82 vision when in going past 60K the speed says im doing 120k to 140k how do i fix it to give me the right speed it just started doing it on my way home
You could remove the speedo assembly from the case and blow it out using compressed air. be gentle , also don't brake the needle off. Its possible that there is some debris in between the magnet and the drum.
Also, grease your speedo cable and the speedo head receptor it plugs into.