Hey all,
I recently bought a 1981 Honda CM400T, around 65,000km on it. Been working on it for a while now and have it running but now having problems. First noticed that 1 exhaust wasnt getting hot so pulled the plug lead while running and yep that cylinder (left side) wasnt firing...checked it has spark though. So did compression test and the Right cylinder (working one) had compression of 185psi, and the Left cylinder (not firing) had compression of 210psi. That led me to think its not valves or piston. Since i had spark i figured carb might be clogged, so i cleaned carb and put it back in and the Left cylinder was firing for about 5mins but the sounds remained. This morning i started it back up and Left cylinder wasnt firing again, and noise is still there.
Any idea on what the noise is? Or why cylinder not firing?
Have had some people say sound is a loose/broken bearing, but want some clarification before taking the engine fully apart.
Here's the video of the bad noise:
Thanks,
Matt
I recently bought a 1981 Honda CM400T, around 65,000km on it. Been working on it for a while now and have it running but now having problems. First noticed that 1 exhaust wasnt getting hot so pulled the plug lead while running and yep that cylinder (left side) wasnt firing...checked it has spark though. So did compression test and the Right cylinder (working one) had compression of 185psi, and the Left cylinder (not firing) had compression of 210psi. That led me to think its not valves or piston. Since i had spark i figured carb might be clogged, so i cleaned carb and put it back in and the Left cylinder was firing for about 5mins but the sounds remained. This morning i started it back up and Left cylinder wasnt firing again, and noise is still there.
Any idea on what the noise is? Or why cylinder not firing?
Have had some people say sound is a loose/broken bearing, but want some clarification before taking the engine fully apart.
Here's the video of the bad noise:
Thanks,
Matt