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V50 gear whine

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iansoady View Drop Down
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    Posted: 29 Aug 2017 at 13:30
Now being able to ride my V50 without feeling as though I'll fall off at the first corner, I've noticed quite a loud gear whine. It's associated with engine speed, so drops in pitch when I change up, and is much louder on drive than overrun. I keep looking behind for the corporation bus.....

My thoughts are either primary drive or maybe the input gear set to the gearbox (I can't quite work out how it all goes together from the parts book).

Anything to worry about, or just "character"?

I will be changing all oils before long but wanted to run the bike for a while to discover everything that needs to be done.
Ian
1952 Norton ES2
1986 Honda XBR500
1958-ish Greeves/Triumph in progress
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Brian UK View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 29 Aug 2017 at 14:02
Check the level of oil in the gearbox. To some extent, they all do that, sir. But on the v50 the gearbox breather is a little button device on the top, and all the oil spews out of it in use leaving very little in the box. I modified mine and added a vertical tube to stop this.
Brian.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote iansoady Quote  Post ReplyReply Direct Link To This Post Posted: 29 Aug 2017 at 15:14
Will do.

Any advantage in adding some snake oil, which normally I avoid like the plague, but should be safe in a gearbox? Something like this: http://www.stp.eu/en/products/oil-additives/oil-treatment-for-gearboxes
Ian
1952 Norton ES2
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 29 Aug 2017 at 21:15
Moly gearbox additive used to be recommended by Guzzi, but modern GL5 oils are better than those available when that model was made.
Brian.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote iansoady Quote  Post ReplyReply Direct Link To This Post Posted: 30 Aug 2017 at 11:09
Any problems with GL5 oils and bronze bushes? Or don't I have any of them?
Ian
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 30 Aug 2017 at 17:45
Don't think there are any in the Guzzi box.
Brian.

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