Vibrations - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 10 (permalink) Old 11-05-2007, 02:32 PM Thread Starter
 
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Vibrations

Hey, all. I have an '03 that has some vibrating issues. When I leave the bike running to warm up, I can see the mirrors and grips vibrating much more than I feel they should be. Also, the higher the RPMs I run the bike, the worse the vibrations get. It happens if I'm in neutral or when on the road, so I ruled out the tires.

Any words of wisdom? I'm starting to feel like I'm on a Hardley!

Last edited by j0hn0tt0; 11-05-2007 at 07:53 PM.
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post #2 of 10 (permalink) Old 11-05-2007, 04:43 PM
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This is just a shot in the dark, but have you checked all of your engine mounts to make sure none have worked loose. I think one of Fergy's mounts came all the way out earlier this year.

"Shutting up rarely leads to anything bad"

Joe McAdoo
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VROC # 28175
-2004 Vulcan 1500 Classic 22000 miles
-1995 VN750 (Back home again!) 25000 miles
-1995 Suzuki DR350 Dualsport 1720 miles
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post #3 of 10 (permalink) Old 11-05-2007, 05:27 PM Thread Starter
 
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Where, exactly, are all of them?
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post #4 of 10 (permalink) Old 11-05-2007, 05:53 PM
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Quote:
Originally Posted by j0hn0tt0 View Post
Where, exactly, are all of them?
Hey, John -
Hope you haven't changed your pipes yet to round out that HD feeling!

You have three sets of through bolts: two are in the back of the engine block - one bolt comes through the block right under the front bevel gear case; the other sits above that, right behind the rear cylinder. I think they're 14 mm nuts - you'll want to retain one with a combo wrench while you use the socket wrench to loosen the other (or vice versa). Up front, there's a whole mounting unit that sits in front of the engine block - the through bolt goes in right around your shift lever and brake pedal, and then there are two smaller bolts that go part way through the frame and into the mounting unit. The through bolt is also a 14mm (I'm pretty sure), but the upper bolts are either 12mm or 13 mm (lucky me - I have one of each on Orleans!).

If those are tight, I might be thinking cam balancer dampers, but your bike is kinda young for that.
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post #5 of 10 (permalink) Old 11-07-2007, 09:04 AM Thread Starter
 
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I only had a minute, so I tightened one of the engine mounts on the front area and the vibrations have already reduced pretty substantially. Thank god it didn't turn out to be something much worse! I'll tighten the rest up tonight. Thanks for the help!
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post #6 of 10 (permalink) Old 11-07-2007, 10:07 AM
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Hey, thats the first time I've been right!! Good deal. Hope thats the only problem.

"Shutting up rarely leads to anything bad"

Joe McAdoo
Springfield, MO
[email protected]
VROC # 28175
-2004 Vulcan 1500 Classic 22000 miles
-1995 VN750 (Back home again!) 25000 miles
-1995 Suzuki DR350 Dualsport 1720 miles
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post #7 of 10 (permalink) Old 11-07-2007, 11:45 AM
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Hey, thats the first time I've been right!! Good deal. Hope thats the only problem.
lol...
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post #8 of 10 (permalink) Old 11-10-2007, 02:39 PM
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I have an 04 thats doing the exact same thing.. some rides are worse than others.. in general, the bike runs great, 50+ MPG ect. sometimes however right around 4K RPMs seems to be the worse spot.. vibrates so much my foot tingles on the pegs. I've checked all my mounts, had several people help me make sure my carbs were in sycn ect and no luck.. I took it to the kaw dealer and they said it seems fine, however they are on 40 MPH roads and less.. right around 60 is where she's annoying. it started with 6K on the bike so it's hard for me to believe I'd have to take the engine down, but stranger things happen I guess..



Borto

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bought 6/1/07 with 3200
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post #9 of 10 (permalink) Old 11-10-2007, 08:35 PM
 
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if it only causes problems at speed, and your dealer does not see a problem idling etc, could your tires be out of balance, round?
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post #10 of 10 (permalink) Old 11-16-2007, 03:45 AM
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my 05 vibrates so bad that the number plate is breaking in half , i have duct tape holding it togeather lol , i think i will check my mounts
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