There is only two castle nuts on the rear and the hex to both is on the left side of the motor as you sit on the bike. after them two its all down hill from there. As for naps well at my age I like them also as they refresh ones body.
Just a thought . If you remove the gear sensor scrub it some with scotchbrite so you get a good contact but remember to watch for the pin on the spring so it does not fire the pin on the ground and you lose it. As I say tomorrow is another day