FYI- My engine noise - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 4 (permalink) Old 07-06-2013, 08:43 AM Thread Starter
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FYI- My engine noise

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https://www.vn750.com/forum/showthread.php?t=33938

My noise problem was a result of a few things. What sounded like marbles being thrown around turned out to be insufficient lubrication to the cam chains in the front cylinder. I was using 20-50 motorcycle oil ( as usual ) and had 2500 miles on the oil. I drained the oil and put in a new filter. 90 % of the noise went away. I then added 6 oz of SeaFoam to the oil and drove 30 miles. I drained the oil, new filter, and put in 15-40 oil. No noise. Engine runs great. After putting in the 15-40 weight oil I did tighten up the MCCTs to quiet the engine more. Tightening the MCCTs is only 1/2 of the adjustment. Above the Cam Chain Tensioner is a chrome flange bolt. This flange bolt holds a spring, part number 92081-1380, which pushes against the upper chain guide. My springs were weak and replacing them quieted the engine more. A 5 minute install for both cylinders. Cost me $10.96 locally
http://www.kawasakipartsnation.com/o...ft-s-tensioner

JM2001

" Loud Pipes Risk Rights "

2001 Vulcan 750
marbled
TOC upgrade on ACCT
Air/fuel mixture set to 2 1/2 out
rectifier relocated
splines lubed
iridiums
decals removed
upgraded mirrors
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post #2 of 4 (permalink) Old 07-06-2013, 09:06 AM
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Thanks for the info.

Mine begins to sound like a sewing machine if I run it over 70 mph for extended periods of time.

From what I've been able to find here, I felt like the ACCT's could be the problem.

Maybe, I will just try replacing the springs and see what that does.

I Corinthians 1:18
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post #3 of 4 (permalink) Old 07-06-2013, 09:13 AM
..have a vulcan good day!
 
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First I ever saw this spring as a problem/cure. JM -Thanks for the education - added to my wisdom bank. LOL


'86 VN750 13,700 mi -Stock
-Purchased 2008 w/8800mi
Replaced ALL Cables . Kuryakyn LED Voltmeter
SilverStar Ultra 9003/HB2 H4 Headlamp, Jardine Fwd Controls,
Iridiums DPR7EIX-9 & Wires, Tuxedo Mod, Coil Mod, P/U Sensor Mod, Fork Seals,
Splines Lubed - 11/4/2012 - MF AGM Battery
Additional Flashing LED Brake Light on Trunk
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 #4 of 4 (permalink) Old 07-06-2013, 12:51 PM
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Quote:
Originally Posted by 3Fan4Life View Post
Thanks for the info.

Mine begins to sound like a sewing machine if I run it over 70 mph for extended periods of time.

From what I've been able to find here, I felt like the ACCT's could be the problem.

Maybe, I will just try replacing the springs and see what that does.
You should put manual tensioners in, honestly. Fiddling with the ACCTs is fairly pointless; it's an inherently flawed design.

1986 Kawasaki Vulcan 750
NGK Iridium Plugs #7803/DPR7EIX-9
Duralast Gold ETX15 AGM Battery
Coastered & Shaved
TOC MCCTs
Metzeler ME880 [110/90-19, 170/80-15]
Balance Dampers Replaced
Tuxedo Mod
Rebuilt Forks w/ Progressive Springs
V&H Cruzers
VN750.com Grill Cover
Meanstreak Seat
Emgo 23-92411 Handlebars
MOSFET FH012AA R/R


1990 Kawasaki Vulcan 750

1998 Honda VFR800 FI

2014 Honda VFR800F

1989 Pontiac Firebird Formula 350
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