Speedo problem / issue. need help
as I went for a ride at lunch today I noticed that my speedo was going haywire. Once I got past third gear and above 4,000 RPM, the speedometer would start sowing some wildly varying numbers. For example, in 6th gear it would read that I was doing 90 at 5,000, but then it would suddenly go to 76mph. then to 86 and so on. At one point when I was at 4500 rpm, it dropped to 0mph, then 23, the 36, then 3, then 76, then 85 etc...
I'm trying to figure out how the speedometer works, and where the measurements are taken or where the sensor is. Also, I have a few tight links in the chain and will be replacing it in a bit. not sure if that would cause any of the issues. -I could see the bouncing of 4-6mph but for the speedo to drop to 0, its nearly imposssible.
BTW, i have stock gearing as far as I can tell, no speedo healer and no power commander.