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I don't wanna argue but you just don't replace or lap a burned valve. It requires a new seat, valve and a gob of other things to get to ground zero. A person would NEVER repair one valve without checking all the others and making the needed repairs. The dealer would fix the one valve and leave the rest alone. Their theory is that only that valve is the problem. This is why I won't use a dealer for anything. Seats have to be pressed into the head which requires special tooling and then the the valve face has to be matched and then centered. All lapping does is show you where your valve seat is sealing on the valve. This is stuff that requires expertise and tooling and a person that knows how the world turns.
You might wanna find a buyer for your tools because it can't be done in a day unless you have all the special tools it takes.
Go to a machine shop and ask to watch what happens when a valve job is done on any engine.
No, I can't really blame the bike but I can make some stink in a public forum where hundreds of people will see my experience.
On a lighter note, the Harley National Drags are this weekend in Bowling Green, KY at Beech Bend.



No need to argue with you pal.....I spent years running a machine shop, have probably rebuilt more engines than you can shake a stick at, never had one comeback on any motor I've built. You can throw all the theory you like at me, it don't hold water !!! Yes, in an ideal world if a head comes off and the customer has the money to spare, all the valves would be replaced.....new seats cut.....replace the guides, seals, ........the full works. But, in the real world, one valve letting by can be sorted in isolation.

Stick with your Harley's if you prefer them......but I've seen my share of 'dealer-serviced' H-D's that looked like the local playgroup had done the servicing.