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Join Date: Nov 2007
Location: Chandler, Arizona
VN750s are not known for that problem. I would recommend replacing the tensioners with proper tensioners from TOC. I Had a terrible racket coming from my engine at only 15,000 miles, I checked the ACCTs, did the "Grambo trick" noise went away, so at last I knew what it was. But it came back right away. I ordered a brand new set of Kawasaki ACCTs, they lasted 10,000 miles until the noise came back. I finally went to the TOC manual tensioners, 45,000 miles ago, and have had no problems since. I don't know how a cam chain could stretch (wear actually) that much in 5000 miles, unless it was run for most of that with loose tensioners. I barely had to tighten my MCCTs when I installed them, the noise went away, and never came back. I would suspect piston slap (tapered bore) or even a con rod bearing before a wrist pin, they are one of the most trouble free parts in most engines.
I am a motorcyclist, NOT a biker.
1997 Vulcan 750, purchased about a week ago
2006 Sportster 1200 Low
2013 Royal Enfield Bullet 500, converted to carb
2001 Yamaha XT225, heavily modified
2004 Honda Rebel 250
1979 Vespa P200E
2002 Vulcan 750 parts bike
1994 Yamaha XT225 parts bike