Driveshaft bearings on the way out?

[MaxB]

Funnily enough, John, I did wonder whether the sound was coming from that part of the exhaust during one of the episodes - that's definitely worth putting on the list of possibles for further investigation. Thanks!

 

[Camel Toe]

does it make a noise when you turn ignition on and off..????

Funnily enough, John, I did wonder whether the sound was coming from that part of the exhaust during one of the episodes - that's definitely worth putting on the list of possibles for further investigation. Thanks!

 

[MaxB]

No noise as you turn the ignition on and off. Noise only present with engine running. Are you thinking along the lines that the exhaust valve runs through a test cycle when you turn the power on?

 

[Camel Toe]

No noise as you turn the ignition on and off. Noise only present with engine running. Are you thinking along the lines that the exhaust valve runs through a test cycle when you turn the power on?

Just wondered as I had a problem with mine and it used to squeal like a stuck pig when I turned ignition on and also when riding..... have you tried holding a longish screwdriver handle to your ear and resting the other end on various areas around the bike to try and locate any strange noise....

 

[MaxB]

Thanks for the tip, John. I shall be getting my longish screwdriver out over the weekend for a bit of a play. How did you ultimately resolve your problem?

 

[Camel Toe]

Thanks for the tip, John. I shall be getting my longish screwdriver out over the weekend for a bit of a play. How did you ultimately resolve your problem?

Bit of wd40 at first but that soon burns off...... You have to get inside it with a small wire brush......carbon builds up over time but my 14 plate LC has 44000 mls now...

 

[roamer]

The throttle bodies do emit a whining noise which can vary depending on temperature ,
the position of the intake flap effects the throttle motors sound,
bearings and gears are unlikeley to be intermittent,
once they fail its a constant noise,
roamer

 

[MaxB]

Thanks Roamer,
It's definitely intermittent. I went out for a spin today and stopped periodically to see if it was doing it, but not a dicky-bird...