R1100GS - Abnormal sound

[spddd79]

Hi guys,

Can anyone tell me what could this sound be all about?

Seems to appear only when the engine is at 4-5 bars temperature.

Many thanks!

Mihai

http://www.youtube.com/watch?v=eyvqGB8cw1Y&list=UUyyJzgiptwSg-XSAxE-3yBg&index=1&feature=plcp

 

[ghiribizzo]

Air + fuel mixture leaking past the intake rubber. Probably between the cylinder head and rubber. Try a new 'O' ring that fits in the groove of the rubber.
Possibly between the rubber intake manifold and metal throttle body.
Are the valves adjusted correctly? Has the bike done high amount of km? It is 'spitting' back through the inlet valves.

 

[Ugly Cow]

Are you referring to the intermittent squeak? If so, probably the alternator belt which should be replaced.

 

[spddd79]

Valves have just been adjusted, bike is around 60,000 miles.

And yes, I am referring to the squeak but it's strictly localized at the left throttle body so i don't think it could be the alternator belt.

Will check the 'O' ring at the throttle body though, thanks for your suggestion!