Well, I just purchased this pristine looking 77 CB750A. Has Original paint, chrome is excellent, has 28k on it. While looking the bike over tonight to try and get it fired up, I removed the plugs. Most of them felt tight coming out. All seemed to go back in except number 3. It seemed to have very mucked threads, and I believe the threads are probably damaged. I can’t see anything the way they go in the motor. But it doesn’t “feel” right. It tightens, but, doesn’t feel like it’s seated solid or that it has gone far enough. Can’t see a thing. It’s like Honda said” let’s make this as difficult as possible. Any Ideas? Or is this a part out waiting to happen??
