Dreer took it apart 30 years ago. Not for a full rebuild, just to make sure everything was ok. Not a ton of miles in the meantime. Not sure what exactly he did or didn't do. That was a long time ago. Gear on the cam? In the timing case? Don't know until I get in there. No rush. I have the spare motor to deal with first. Comstock says barrel is toast so I need to find an option there.