Newbie with an engine knock.
Greetings all. Recently purchased an 02 Vulcan 750 with an engine knock. It really didn't sound like a rod knock so I took a chance. As best as I can tell, using a stethoscope, the sound is coming from the upper portion of the front cylinder. The bike has a little over 4,600 miles and the compression is good. Drained the oil and checked the filter and I did not see any signs of metal. I have read about the problems with the Acct's and have replaced them with the manual type with no improvement or difference. Per the Kawasaki service manual, the I.C.Ignitor can cause an engine knock. (although I don't know how) I have checked the readings on the ignitor and the 4 terminal connector reads within range. Only 5 of the 30 readings on the 6 terminal connector read within range. The engine starts and idles O.K. so do I assume that the ignitor is O.K? Could there be a problem in the valve train? Anyone with any suggestions or ideas, please let me know. It looks like you can't do to much with these engines without removing them.
Thought I would add a final chapter to this post. Finally removed engine, front cyl. head, and cyl. exposing front piston. Loose as a goose. Obviously had spun bearing in connecting rod. Now in process of rebuilding.
Last edited by dodger; 11-11-2011 at 12:50 PM.
Reason: Found what was causing knock.