Can a Automatic Cam Chain Tensioner(ACCT) just be bad - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 3 (permalink) Old 05-28-2018, 11:20 PM Thread Starter
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Can a Automatic Cam Chain Tensioner(ACCT) just be bad

I was wondering if its possible for the ACCT that is OEM, to just be bad, and not extend far enough to keep tension on the chain, and therefore keep it from slapping around.. I have a 2004 Kawasaki Vulcan 750 (28k miles), and keep getting a tapping / knocking.. not sure which side its coming from as no matter where i stick my head, its sounds like that's where its coming from.. I removed both of the Tensioners to look at them.. I did the Grambo trick as well, and both springs seem to spring right back.. i did notice that the one from the right side of the bike, looks like its about 1/16" shorter as far as the amount of distance the plunger is sticking out.. are these adjustable at all? sorry for being a noob, just never dealt with this issue before.. purchased the bike, and the guy i got it from said that's just a normal sound from the Vulcan engines, and me being an idiot, believed that..
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post #2 of 3 (permalink) Old 05-29-2018, 12:30 AM
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Yeah, they go bad. They suck! Well, that's my opinion anyway.

The Vulcan tensioner is an old design. Newer bikes all use a ratcheting mechanism. I bought a few different ratcheting style tensioners off ebay thinking that I'd find one that would just fit. I haven't had any luck with that approach so far. That probably sounds like a silly idea, but the 1986 Kawasaki 454, which is a similar, older style automatic tensioner can be replaced with a newer, ratcheting-style tensioner from a 500 Ninja.

I made a manual cam-chain tensioner for my bike as I'm a home-shop machinist. Manual tensioners are available on Ebay for the Vulcan. I would consider replacing the stock unit with a manual tensioner. Mine has really changed the character of the bike. I was so tired of that annoying racket, and it can't be good for the engine either.

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post #3 of 3 (permalink) Old 05-29-2018, 09:33 AM
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This is the dreaded 'Vulcan tick.' The auto tensioners wear out about every other year. The best thing to do is replace them with manual tensioners. I got mine from a guy in California. It took all of 5 minutes to do. And the tick was gone.

Neal "Nee Nee" Rehse
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