Quote:
It just hit me that the tappets that came with the head were all in a bag and we used the ones from the old head. Remember seeing somewhere where it said to not mix these up when taking them out and to return them to their original spot. I don't remember seeing any marks on the old ones but I'm going to look and see
Scott,
Judging from this post, I'm going to assume you placed the shims in any location without measuring them. Not good. You need to check the valve clearances (cam to valve shim)now with feeler gauges. There needs to be .15 to .20mm clearance on the intake valves and .25 to .30mm on the exhaust. You get this by measuring the clearance, then removing the shim and measuring it to determine it's thickness. Increase or decrease the shim size to get the desired cam to valve shim clearance. If the clearance is too close or non existent, you will burn a valve. Too great, noisy tappet, wear and if great enough, decreased performance.
Sorry for the simplistic explanation but I'm getting some bad vibes as to what you might have done...... Hope things go well for you.
12 Rocket Roadster
03 Bonneville America
69 BSA Firebird Scrambler
73 Yamaha TX 750
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