That's why you do the PM on the nuts. The bike is low on miles but long on years. The nuts have likely never been off. So next tech day you clean and lube them (if you have to borrow a wrench). When the day comes you have to take them off, you want them in good shape. If you are doing a fix 'n' flip on the bike then you ignore them. You will be taking the mufflers off fairly soon so you will have a chance to de-carbon the joints and lube those. Oil has stuff in it to swell the seals so the fresh oil may be swelling the pushrod tube seals some. Tightening them with the drift is a standard routine you do every so often. Takes 5 sec. per seal and isn't touchy to do. Somebody in the local club likely has a drift.