Ringing noise - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 29 (permalink) Old 04-30-2018, 09:56 PM Thread Starter
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Ringing noise

For a while at exactly 3000rpm I was getting a ringing noise, like a loose washer on a bolt. After a few hundred miles the sound moved up to 5000rpm. Doesn't change with the clutch applied/released or moving/stationary.
It sounds to be from the right side of the bike. I removed the tank and resecured everything but the noise still happens.

The oil screen didn't have any debris and the oil sample returned normal other than slightly elevated iron, which blackstone said is likely from the shared gearbox.

I have the ACCT rebuild kit coming from TOC hoping its just a stuck cam tensioner. Is there another source I could be missing?
Primary chain? But I think the noise would change ringing RPM with the engine loaded or unloaded.

1989 VN750
Highway blaster

2006 Honda Rebel Diesel
100mpg, low and slow

1982 Mercedes 300D
Modified engine, 4-speed manual
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post #2 of 29 (permalink) Old 05-01-2018, 06:57 AM
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I had a ringing noise once and it was the license plate vibrating.
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post #3 of 29 (permalink) Old 05-01-2018, 08:02 AM
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I have the same noise. Except mine sounds like it may be on the left side. I suspected my crank case breather filter, I wrapped it in a rag yesterday to see if the sound would go away. I'll find out this afternoon. I've watched the videos about the ACCT being broke, and mine doesn't make that noise at all. Can't even make it do it when I'm parked, only while riding.

-2016 Indian Springfield
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-1999 Kawasaki Vulcan 750
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post #4 of 29 (permalink) Old 05-01-2018, 09:32 AM
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Does it only happen while moving? I've noticed some high-pitched harmonics coming from the rear gears on several Vns, mine included. You can hear it in ride videos.

My hand levers jingled a bit, until I tightened the pivot bolts.

2003-21k mi
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post #5 of 29 (permalink) Old 05-01-2018, 11:32 AM
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I had it too, was my extra keys on the keychain rattling on the handlebar riser area
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post #6 of 29 (permalink) Old 05-01-2018, 12:59 PM Thread Starter
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It does it any time the engine is around 5000rpm no matter moving or revving in neutral. I've put my hands on everything but I can't hear exactly where its coming from. Not the keys, I can hold onto them and the noise doesnt change.

1989 VN750
Highway blaster

2006 Honda Rebel Diesel
100mpg, low and slow

1982 Mercedes 300D
Modified engine, 4-speed manual
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post #7 of 29 (permalink) Old 05-01-2018, 01:45 PM
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Get a stethoscope

my bad

Originally WilliamTech
Since May 2011
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Splines Lubed - 11/4/2012 - MF AGM Battery, Dampers went out @ 13+K !
After TOC MCCT's..... so amazingly quiet I discovered a rattling heat shield on my stock exhaust !

...have a Vulcan good day !
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post #8 of 29 (permalink) Old 05-01-2018, 04:36 PM
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Quote:
Originally Posted by WilliamTech3 View Post
Get a stethoscope

my bad
$4.99 at Harbor Freight. works great. Kinda scary hearing all the chit happening in this engine.
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post #9 of 29 (permalink) Old 05-01-2018, 05:24 PM
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I had a ringing noise for a while too, but it went away.
Then i realized my gremlin bell was missing....doh!
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post #10 of 29 (permalink) Old 06-25-2018, 02:09 AM Thread Starter
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1989 VN750
Highway blaster

2006 Honda Rebel Diesel
100mpg, low and slow

1982 Mercedes 300D
Modified engine, 4-speed manual
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