wine or whistling noise

wkjohnson · Jul 12, 2012

When I started up my 71 commando yesterday and again today it has a whistling or winning noise that seems to be coming from the engine. Anyone know what this might be?

batrider · Jul 12, 2012

I remember my main bearings sounded like that when the originals went on my Combat at 4700 miles. Does it change pitch when RPM changes? Put a piece of fuel line hose in your ear and listen around the engine.

wkjohnson · Jul 12, 2012

Thanks. Tried that listening technique but couldn't pinpoint the source. It was more of a squeak than a wine and now it seems to have stopped!?

Hobot · Jul 12, 2012

I'd pull primary with suspension the alternator nut might of backed off into case but no longer rubbing now as laying in wait at bottom to be picked up and run through the ringer. Would allow jerking on crank bearing for sense of anything loose. Loose cam tensioner drop might do this but damn rare unless some over rev power event.

frankdamp · Jul 12, 2012

Drink enough wine and maybe you won't here the whistling. It won't be winning either.

powerdoc · Jul 13, 2012

Whining?

rvich · Jul 13, 2012

Whiners never win, winners never whine and wine is always a winner!

Matt Spencer · Jul 14, 2012

CamChain to tight ?

How can you tell when another plane load of Er.. have landed at Mangere airport , You can still here the whineing after theyve shut down the engines .

geoff71 · Jul 16, 2012

Mine does the same thing - it comes and goes. I originally thought it was the tach drive, but it seems to come from the primary. It really sounds like a bad squeaking belt noise if anything...

Dkt26 · Jul 16, 2012

I have the same thing that has worsened to a chatter/rattle (spare the missus jokes-she's watching me). Pulled the primary cover to check chain tension etc.
Tension good however 2-3mm "float" on the clutch sprocket.
It also appears that the gearbox shaft, when spinning has a slight "oblong" to it indicating movement there somewhere or slightly bent gearbox mainshaft( it's only 12 mths old)

I think the noise is probably a flogged primary chain.

donmeek · Jul 16, 2012

MAYBE MORE INFORMATION FOR THE TECHNO DUDES TO DIGEST? A BEARING 'USUALLY" HOWLS, NOT "WHINES" IS THERE A DIFFERENCE? tHE STOCK SPRING-TYPE HEADSTEADY WILL MAKE FUNNY NOISES AT CERTAIN RPMS IF TOO TIGHT.

Dkt26 · Jul 16, 2012

donmeek said:
MAYBE MORE INFORMATION FOR THE TECHNO DUDES TO DIGEST? A BEARING 'USUALLY" HOWLS, NOT "WHINES" IS THERE A DIFFERENCE? tHE STOCK SPRING-TYPE HEADSTEADY WILL MAKE FUNNY NOISES AT CERTAIN RPMS IF TOO TIGHT.

Havin problems with the caps lock there Donmeek or are you just yelling at us
:mrgreen:

donmeek · Jul 16, 2012

NO NO , JUST NOT PAYING ATTENTION. MY 2 CENTS, USUALLY WORTH A LOT LESS.

frankdamp · Jul 16, 2012

We have a wine bar here in Anacortes which has the slogan on its reader board "Wine a little, you'll feel better".

Dkt26 · Jul 16, 2012

donmeek said:
NO NO , JUST NOT PAYING ATTENTION. MY 2 CENTS, USUALLY WORTH A LOT LESS.

Haha
Cool I was getting nervous. Thought yo might know something we didn't :lol:

J.A.W. · Jul 16, 2012

Cheap wine & a 3 day growth?
www.youtube.com/watch?v=cFKxbr4_-Vc

donmeek · Jul 17, 2012

sorry about the CAPS, I was multitasking and not doing any of them very well. When in your sixties its hard enough to do one thing at a time decently, so I should know better.

geoff71 · Jul 17, 2012

My transmission "howls" now, one of two reasons I am not riding my Commando at the moment. The noise in question sounds like a slipping belt in a car or other belt driven machine, I have yet to get a good direction to go in to resolve this mystery...

Sorry for the hijack.

Jeandr · Jul 17, 2012

Reading the title fast caught my eye with this: "WIFE or WHINING noise"

Now back to regular programming

Jean

Hobot · Jul 17, 2012

Seems to me that of all the various niches of motorcycles, women seem the least involved with the British Bike kind. Anywho I've had a howling in tranny that turned out to be shot to shit bushes slipping and letting shafts out of line so dog faces smeared out by un-sqaure contact with cogs. An over tight primary chain definitely had its part to play in my case.

wine or whistling noise

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