I have a K0 ct70. It ran fine last summer and suddenly died on a ride. I assumed it was electrical. Replaced points and condenser and questionable ignition winding. Spark was fine. Cleaned carb. Didn’t start even with a shot of starter fluid. Bought a harbor freight compression tester and it showed no - zero compression. Pulled head and cylinder. Intake valve wasn’t seated, piston, rings, and cylinder looked fine. Intake valve pulled and there was rust in the valve seat and valve stem is slightly bent. Can I have a new valve seat cut? Do I need to have the valve guide replaced?