My son's 'Shee didn't hit on both cyl all the time when he bought it. Pulled flywheel, cleaned rust off stator, cleaned inside of flywheel, cleaned rust off tabs for pick-up coil on outside of flywheel, BAMM, good as gold ! X-2 on plug caps And pick-up coil gap . Might as well clean your carbs and check for junk in the trunck, I mean tank (lol).