Check the wire connector on the neutral sensor, on the left side of engine.
Check the engine motor mounts to make sure they are tight and the engine is not rocking back and forth in the engine mounts - you can apply the rear brake and rock the atv back and forth while watching engine to see if it moves.
Okay now when engine is off overnight green light comes back on and starts . it's cold out and snow I use out for farm chores . It's a 2005 750 is there any way to test for moisture? Where would be the way to start without taking the hole schoud apart.
Test what for moisture ?
And if your checking the motor mount bolts to see if they are tight, you only need to remove the plastic foot wells to get to the bolts and nuts.
One bolt on front bottom of motor, and one bolt on back of motor - if loose, the engine case can get egged out.
The two interlocks, the two solenoids on either side of the vehicle-down switch at the very back of the tray under the seat allows it to get power for the starter solenoid by either being closed by the power used by the neutral light or brake light. Assuming both are OK, if you are having a problem getting the neutral light to come on with the shifter, and it is set correctly, then it either has a bad neutral switch or..the shifter fork is bent..which happens when it gets shifted while still moving and it pops out of gear. This would also hinder it shifting into other gears and be off-alignment per the detents. You can always hold a brake on enough for the brake light to come on and start it. Otherwise I would start by replacing the neutral switch first and take it from there.