Leaderboard

The thumb throttle adjustment is the only "legit" way to limit speed. Yes, it does get faster on flat ground, up to the speed corresponding to thumb position and it may even go beyond that down hill. I would think even if there were an adjustable rev limiter in the CDI it would still behave the same uphill and flat ground. The only way that i see to not have it slow uphill and fast downhill would be a speedometer limited throttle like a modern vehicle so that it will only do say 15mph uphill and 15mph downhill/flat ground.

You can't really test a CDI, they are a bit elusive. You have to troubleshoot everything else that has to do with spark and if it all tests good, then the CDI would be the last option. You might also try the "baking" technique for the CDI. Sometimes you can bake them for a few minutes at very low temp and drive off moisture enough to get it to work again. @Frank Angerano is a better resource on baking CDI's.

Thank you I will do this after I replace the driveshaft. I will definitely let you know!

Hey Frank Angerano i had a chance to get the belt housing off the bike and the nut come off the front pully so it wants the belt. Thank you for the help its back up and going now.