The bike: 1972 R75/5 about 55,000 miles, parked for many many years, getting a once over before moving to the category of "rider". I'm pulling the flywheel to inspect and replace the rear main seal as well as the oil pump O ring. Removed the 5 bolts in flywheel and she is stuck! I don't want to use a puller as that might push the crank forward, it is blocked but does not seem worth the risk. I thought of using a dead blow hammer attached to a bolt screwed into the wheel. So, I am looking for suggestions on the safe removal of the flywheel.