Little update: I made these tests.
1. Test: Piston a bit after TDC, then with a wooden handle, through the sparkplughole and trying to push the piston a bit down --> No wabble on either of the pistons.
2. Test: While the engine is warm and running, I unplugged one cylinder at a time. --> No...
I appreciate your detailed answer and start to see things more clearly.. unfortunately. If I would trust my guts, I will also say it comes from #3
English isn't my mother tongue, therefore the maybe unclear description. As you guessed it: They noise is regularly cyclic, but not in a 4/4 beat...
Thanks for the answer, even though I would like to have heard another one instead... Is there a way to validate the rod knock, without pulling the engine? I don't understand though, how it should be striking the head, without touching the valves first. A new headgasket has been installed, aswell...
Hello everyone,
I am new here, so first up something about my bike. I bought a CB 750 KZ '79 DOHC with 80.000 KM on it last winter. It's my first 4-Stroke motorcycle, but I was repairing/restoring some cars before that and wouldn't call myself unhandy with vehicles in general. The bike was...