I need some help with cleaning my older ASP .80 4 stroke. I had trouble this summer keeping the engine running, so I‘ve decided to rebuild and clean it. I found a lot of carbon build up on the exhaust valve and even a little on the intake valve. I believe this is part of the problem of losing compression and stalling.

How do I clean these surfaces without damaging the finish and have them re-seat themselves properly?

What chemicals can I buy to do this? Carburetor cleaner, Acetone, Lapping compound….etc.

I’ve never done this before, so the easier for me the better. Thanks reading and any input would be appreciated.

Steve