Transmission whine? - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 4 (permalink) Old 08-17-2018, 04:32 PM Thread Starter
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Transmission whine?

Hey guys, so after dropping a valve a few weeks ago resulting in a see through piston, i managed to source an engine from a breakers yard. Had it shipped down from Scotland, visually in a sad state.
After a good clean and some paint, it's fitted & running well. However, there was a very slight, whine when riding, nothing when stationary. I thought it was wind noise at first. The chrome cap on the bevel housing then somehow fell off on the road and was throwing out oil.. I took the whine as a sign of wear, so I swapped out the bevel box with its internals for my old one cos i know it's good...
The whine is STILL there!! Although it's barely noticeable should i be worried? Any thoughts? I plan on lubing the shaft splines as they could do with grease, not sure if that could be it though.
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post #2 of 4 (permalink) Old 08-17-2018, 06:04 PM
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I think they all some light whining to them. Mine does it, more of a whirring sort of noise from the engine, and the rear gear also has some harmonics in it at highway speeds.

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post #3 of 4 (permalink) Old 08-17-2018, 06:11 PM
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Likely could be a completely unrelated thing on the bike (like a vibrating cable) or it's something in the drive train.
Lube the spines (moly grease) and the front bevel gear (lithium grease) and see if that helps ....

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post #4 of 4 (permalink) Old 08-17-2018, 06:17 PM Thread Starter
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That's reassuring, thanks guys! Just found it strange that it's only started with the new engine, the bevel, shaft, final drive etc are the old ones and were silent before.
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