I have an 08 600r motor with 800 topend, and when I flip the kill switch it doesn't shut off all the time, so i try the tether cord and it stll doesn't shut off, I end up having to pull spark plugs off to shut it down. I have checked all of theconections any ideas
I have seen this and been a victim of it. Most of the time it is caused by one of two things-
Lean condition, turning your spark plugs into glow plugs so motor diesels (very bad)
Or wiring. 2 main places to look- On your two 3-prong rubber connectors coming out of your stator, or rectifer wiring/plugs.
My guess is in your wiring. Inspect your harness for any spots it may be rubbing again your pull cord, jackshaft, motor straps, or case. Then, open all your electrical connectors, spray them all with carb cleaner, remove any debris, and you should be good to go. There's only so many places to look. If that doesn't work, test your kill switch, tether, rectifer, and ignition coil for proper resistance.
If none of that works let us know.