Click-clack - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 47 (permalink) Old 02-20-2020, 07:55 PM Thread Starter
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Click-clack

So I’ve read quite a lot on here about the ACCTs and MCCTs for this bike. Since it’s winter (well almost, it hasn’t been real cold) here in philly I get this sound when the engine has been sitting and is completely cold. It doesn’t last for longer than a few minutes so I’m assuming as the engine warms up things are expanding into place. But I don’t have enough experience to know the difference between a valve tapping or a cam chain clanking. So far I’ve tried the grambo trick, but it didn’t make a difference so Before I try that again or go even further and get new tensioners, I wanted to see if someone could give me a positive ID from the video.

https://youtu.be/Pa37CE-DaJM
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post #2 of 47 (permalink) Old 02-20-2020, 08:02 PM
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Touch each tensioner while it's clacking, then touch each valve cover. Where do you feel it most?

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post #3 of 47 (permalink) Old 02-20-2020, 08:16 PM Thread Starter
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Touch each tensioner while it's clacking, then touch each valve cover. Where do you feel it most?
Excellent question, by purely listening I at least know it’s the front cylinder. On next start I will do that. Judging by that question I’m guessing both make similar sound?
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post #4 of 47 (permalink) Old 02-20-2020, 08:58 PM
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Excellent question, by purely listening I at least know itís the front cylinder. On next start I will do that. Judging by that question Iím guessing both make similar sound?
They're very similar, but I don't have a ton of in-person experience with these sorts of noises out of the VN750. On just about any car engine, I could diagnose from 20ft away.

Mine makes a very slight tensioner tap, when cold, that goes away in the first minute. Yours sounds like an amplified version of that.

I'm a fan of the $5 mechanic's stethoscope at Harbor Freight, have one now but rarely get to use it. I've only used it on the Vulcan so I know what normal sounds like. It sounds downright scary. I can hear every rocker, cam chain, guide, and roller with the stethoscope. One other time I used it to find a noisy serpentine idler.

If you find one tensioner where you can feel the tap, you've pinpointed the problem. You shouldn't feel a rocker tapping at the tensioner body unless it was really extreme, like almost breaking through the valve cover.

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post #5 of 47 (permalink) Old 02-20-2020, 09:30 PM Thread Starter
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Good deal. Thanks for the tip. I’ll give that a try on next start. I guess my natural reaction was to not touch the engine once it’s running.
That’s the first part of the question. If I do find it to be the tensioner, is it failing? Or is it just a product of expanding and contracting because of the weather. Because it stops and I don’t hear it until the next day when it’s good and cold. I put the bike in storage last winter and didn’t hear it during the warmer months last year so this is my first run with the bike in the cold.
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post #6 of 47 (permalink) Old 02-20-2020, 09:52 PM
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It's a lot louder than mine has ever been, so I lean toward failure. If it quiets down completely after warmup, it's probably just getting really weak, and will fail soon.

That's a lot of clacking to have on each warmup, so it's putting extra wear on the guides, etc. each time. Best plan is to do an MCCT, or replace the ACCT. Spring replacement on the ACCT is a temporary fix according to those that have gone that route.

The TOC brand MCCTs are really nice, but also pricey compared to the $8 to build your own.

TOCs were about $50 each. Others on ebay were around $25 each, but they come with a bolt that's kinda too long and interferes with the coolant tank. If I did those I would just replace with a shorter bolt.

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__________________________________________________ ____________
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post #7 of 47 (permalink) Old 02-21-2020, 07:18 AM Thread Starter
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Ok good deal, thanks for the info. I’ll try to pinpoint it for sanity on next start up and go from there. It would be nice if this bike would stop requiring me to part with chunks of cash for a few months. I got it for a good price but think I’ve probably bought it twice by now with all the repairs an tweaks lol.
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post #8 of 47 (permalink) Old 02-21-2020, 08:33 AM
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Ok good deal, thanks for the info. Iíll try to pinpoint it for sanity on next start up and go from there. It would be nice if this bike would stop requiring me to part with chunks of cash for a few months. I got it for a good price but think Iíve probably bought it twice by now with all the repairs an tweaks lol.
Know what ya mean. Here's how I look at repairs, I think about how many bike/car payments I got to skip since the last repair. Not to mention depreciation on a new one.

2003-21k mi
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__________________________________________________ ____________
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post #9 of 47 (permalink) Old 02-21-2020, 09:13 AM Thread Starter
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Quote:
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Ok good deal, thanks for the info. I’ll try to pinpoint it for sanity on next start up and go from there. It would be nice if this bike would stop requiring me to part with chunks of cash for a few months. I got it for a good price but think I’ve probably bought it twice by now with all the repairs an tweaks lol.
Know what ya mean. Here's how I look at repairs, I think about how many bike/car payments I got to skip since the last repair. [IMG class=inlineimg]/forum/images/smilies/smile.gif[/IMG] Not to mention depreciation on a new one.
That’s a good philosophy. I could buy into that for a while. But on the flip side of that my thinking is I’m 43, this is my first bike. It’s safe to say I’m hooked on riding for as long as I’m able and I don’t expect this to be the only bike I ever get. Every time I have to put more money out on a bike that I “own” it hurts my case for that VN900 custom that hope to get in a year or so. That’s money I could stashing to buy that bike.
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post #10 of 47 (permalink) Old 02-21-2020, 07:09 PM
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Thatís a good philosophy. I could buy into that for a while. But on the flip side of that my thinking is Iím 43, this is my first bike. Itís safe to say Iím hooked on riding for as long as Iím able and I donít expect this to be the only bike I ever get. Every time I have to put more money out on a bike that I ďownĒ it hurts my case for that VN900 custom that hope to get in a year or so. Thatís money I could stashing to buy that bike.
Yup, then there's the next bike fund.

How many bikes does one guy need? Just one more!

2003-21k mi
Shaved w/UniPK92+Stock Jets-TPE/MOSFET-Shinko Tires-AGM batt-bags-chrome-LEDs...more
__________________________________________________ ____________
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Owner's Manual: http://www.mediafire.com/file/nscb5f...ers+Manual.pdf
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