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Join Date: Jun 2008
Location: Flushing, NY
Replacing my engine dampener mounts for vibration issues
My vibration issue, temporarily improved, is back. Right around 3K RPMs my bike is humming enough to cause my keys and even my Stebel horns to rattle. My freakin' LICENSE PLATE actually rattled loose, and I almost lost it (it's a vanity plate so it would have been pretty annoying).
Reading the service manual, it says that the most likely cause is a need to replace shrunken or rotted rubber dampeners. Otherwise, if it's something going on inside the engine, it's a pull job with dissassembly (beyond my prowess or patience).
I can visually identify the rubber dampeners for the main frame bolts as being shrunken, the bolts are tightened as tight as I can with a torque wrench but there's still about two millimeters of gap. So I'm hoping that's all it is.
Replacing dampeners should be simple enough, right? On BikeBandit, I went to the Engine Mount schematic and identified the following parts:
92075A: DAMPER, ENGINE MOUNT (631690-001) @ $21.94
92075B: DAMPER, ENGINE MOUNT (631692-001) @ $28.09
92075: DAMPER, ENGINE BRACKET (631689-001) @ $15.22
(The 92075s that are the front, attached to what are labeled 92002 and 92015, are the ones I can visually see look shrunk compared to the ones on my other, non-vibrating VN750.)
Has anybody experienced this kind of vibration that was fixed by replacing just these dampers?
Also, I can't quite tell from the BikeBandit diagram how many of these I'll need. There are so many parts labeled "92075". Do I need TWO of each of the three parts, one for each side of the bike, or just one?
"Until you have the courage to lose sight of the shore, you will not know the terror of being forever lost at sea." (Despair.com)
Last edited by robardin; 01-13-2010 at 10:28 AM.