Here's the story: 1. She was due for a valve adjustment (and was getting hard to start, but no tapping noise at all) 2. I check 5 valves and adjust 4 (too tight). 3. I re-check clearances, all are within spec (.10-15 mm for intake, .20-.25 for exhaust) 4. She starts like a dream, but makes awfully loud tapping noise. 5. I re-check clearanes. All are within spec, but tighten the widest clearance 1 notch for good measure (still within spec) 6. I re-assemble and she starts good. I still experience same tapping noise. 7. I repeat this twice more and get the exact same results. So, as of right now, all of my valves are within spec, verified by 2 people at different times (always checked stone cold), but makes obnoxious tapping noise. I let it warm up the last time and still experienced tapping. Unfortunately I did not document my original shim sizes. I traded shims from a friend's Hot Cams kit. I've read from my search that these engines just make a lot of noise. But EVERYONE who has heard it, agrees that it's just TOO much noise. I'm using flat feeler gauges. Should I get pre-bent gauges instead? The TDC marks on the flywheel look like this: |-| | Which of the three do I line up with? Do I really have to remove the carb and top engine brace brackets like the manual says? What did I do wrong?