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Looks like your batting avg. might not take a hit here...Cyl. #2 and #3 had clearance on two of the intake valves of 0.002" so I'm going to do some math and figure out the new shims. (the rest of the clearances were 0.004"-0.005") I'll wait until I get the new shims in before I officially thank...

I checked compression as soon as I picked up the bike. It looked pretty good (Cyl 1= 141psi, Cyl 2 = 148psi, Cyl 3 = 151psi, Cyl 4 =142psi). I picked up a set of feeler gauges yesterday, so I'll check the valves this weekend to see if you're still batting 1000!

I've only had the bike for 3 months, and it had been running fine......there's never been any reason for me to check or set the valves. Do you think that the clearance being off would cause Cyl. # 2 and 3 to work fine when it's cold but stop opening/closing once the bike warms up? It continues...

Hey guys, I'm hoping someone can help me out with a problem I'm having on my 1980 CB750F. The bike fires up without any issue and drives fine for about 10 minutes, then I'll lose cylinder 2&3! I need to let the bike cool down, then it starts up fine again...but after another 10 minutes or so...