I have a really mint 2nd gen rwb 750. Really great shape, and mostly a show it off ride 5xs per year on a sunny day. So, I get it dealer serviced about once per year, and all good with no maintenance by all thumbs me. So today I decided that it was time to adjust the chain. According to both owners manual and service manual it says start by loosening the axle nut. That big nut just will not budge. I dont see where it is staked like the later vfr with the single sided swing arm. I have used a ratchet, breaker bar, and then even an air wrench. Nothin I have tried to look closely through my old guy glasses, and the axle nut almost looks like there is some kind of internal washer that I can see. The parts diagram just shows a regular big not that screws onto the end of the axle, on the brake side. What am I missing?