Join Date: Jan 2017
Location: Lawrenceville NJ
Buy a compression tester, $15. Maybe the flywheel shear key moved? If it turns out the valve, you would lap it in place but you need to buy grinding paste, a lapper, and a valve compressor, all totalled about $40 not including the tester. However you have to check the valve stem is straight otherwise a new valve. Most likely the valve seat came out rather than a bad valve.