You're correct that I already lapped them. This is my first time checking the clearances. When I took the head off, I lapped all the valves, put the head back together, reinstalled the head and engine, and now I'm troubleshooting the loss of compression. I'm gonna keep going with putting in the new shims and getting the clearances all set. It might be a week before I have another update on the status of this repair because my shims are set to arrive on Friday.He says he lapped the valves already. Then the zero lash issue? I'm lost now. Unless lapping closed up the clearances and didn't recheck.
Maybe if I checked the valve clearances before I took the head off the first time, then I would have another piece to the puzzle.
I heard that you can't actually have 0% loss of air because of the small openings around the valves that allow for the valves to expand when they're hot, right?You do all that and your leakdown test will be at 0 % loss.
And to answer your question of how much I paid for the bike, I got it for $1,400. Probably should've asked for less, but I learned from my mistake. The guy sold it as "not starting" even though it started when I bought it from him. He also said he was afraid that he messed something up with it when he ran it with no exhaust for some time. That's the main reason why I've been so focused on the valves during this entire repair.