The neutral lock out system is quite complex on Yams. Most likely problem is the neutral switch in the engine faulty, or a wire come off. If you can trace that wire and earth it onto the engine, you will know if it is the switch at fault if the light comes on when you earth the wire. Someone yesterday posted the lock-out system for a Big Bear, the Timberwoolf is probably similar, so it is worth looking at it, page 1 especially, if you can read a wiring diagram. https://atvconnection.com/forums/yam...-big-bear.html