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squeeky fanbelt-type noise? (newish Breva 750)

barry.b

barry.b

Just got it firing!
Joined
May 26, 2012
Messages
13
hopefully someone here knows this

Background: this Breva 750 is 20 months old but has only 4300 km on the clock. It's been very well looked after by it's previous owner (300km ago). Near new - when I bought it, I took it to Tom who shooed me away saying come back at it's 5000km service (slow going getting there - not enough time)

last couple of weeks, it's had the occasional loud squeal that comes and goes - it sounds like the horrible loud noise from a loose or wearing fan belt on a car.

anyone come across this?

I suspect it's the clutch - you can hear it coasting to the lights while still in gear but pulling the clutch in. Occasionally it's done it slowly going uphill

thanks
Barry
 
Hope I'm wrong but I heard a similar noise when the main crankshaft bearing turned in the housing. My V7C started leaking oil shortly after that which was a bit of a give away. But first I would check anything that revolves, wheels etc. to see if they are causing the noise. Good luck.
 
Barry,

One rider had that squeal from excessive dust from the clutch plates, which was cured by blowing compressed air through the clutch housing.

However, that you hear it when you pull in the clutch, coasting to a stop, indicates another idea. Noise when the clutch is pulled in, or when sitting in neutral, is common. The noise should be eliminated or greatly reduced when in gear and running. This is because of their automobile style dry clutches and should not be considered a problem. If concerned, find a knowledgeable Guzzi rider or mechanic and have them listen. The bike can also be compared to Ducati motorcycles that run dry clutches as well, especially one with an open clutch cover.

The noises are from vibrating springs on the clutch plate, or the looseness of the friction/floater/pressure plates which are secured by a snap ring. The plates are naturally loose and can rattle when not engaged. The sound is accentuated by the flywheel, which acts as a bell.

Of course I could be wrong.

Joe
 
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