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So I've adjusted the valves, the ignition timing and set the carburetor to the specifications in my Clymer manual. The spark plug works perfectly and it has a new battery and ignition coil. All this and it will not run. I got it to start for a few seconds but couldn't get it to start again ...

Ok so the valve clearance was a bit too small, that has been fixed. However, like most inexperienced mechanics, I make mistakes. I overtightened one of the valve covers (or tappet cap I believe it's called). Do you know of any site I can buy one from? Ebay only has one person selling as a "buy it ...

Ok, thanks! And do I still need to adjust the valves even if I have never touched them and know that the previous owner hasn't either?

Hey everyone! So I've been working on a little 1971 Honda CL70 for almost a year now and can't seem to get it running right. Its newest problem is backfiring. If you apply the throttle more than halfway then it's like you're standing in the middle of the O.K. Corral. The ignition coil is brand new ...