High-pitched whine?

[Victoria]

My Ninja 250r has been emitting a high pitch whine after riding that I have discovered stops after the petrol cap is opened....? what's with that?

[Tony.OK]

Could be that your fuel overflow is blocked and the tank is pressurising(sp) , does it phhfffttt when ya open the cap?

[fatzx10r]

just the breather for the fuel tank venting off fume's when it heat's up a bit, both my zx10's did it. it's fairly normal

[Crasherfromwayback]

Tell your pillion to shuddup.

[xwhatsit]

My Ninja 250r has been emitting a high pitch whine after riding that I have discovered stops after the petrol cap is opened....? what's with that?
Sounds like my girlfriend -- only shuts up when we pull into a petrol station to fuel up as well.

[MIXONE]

Yes I had one on my old bonnie that mysteriously disappeared when the wife stopped hopping on the back.

[slimjim]

Tell your pillion to shuddup.

:clap::clap::clap:

no sounds like its struggling for airflow

[imdying]

It's the Kawasaki meow... we had a thread on it recently. Not sure why Kwakas do it and other brands mostly don't... Perhaps the tank vent isn't open to atmosphere, but has a low pressure release valve... not sure... but rest assured, Kawasakis meow, and it's normal.

[Duke girl]

Mine makes the same noise and I laugh at it everytime i hear it cos it sounds like whatever is in the tank is trying to get out with opening the petrol cap. It eventually stops after a few hours. I must admit this is the 1st bike I have heard doing it, so your not alone there. How are you enjoying riding it?, as now that I have mine run in I find it loads of fun and so easy to put into corners and not having to do alot of breaking coming up to them.

[henry]

Your bike sucks, literally.

[Manxman]

Does the whine increase in volume if you ride past:
a) a Roosters player, or
b) an Aussie Netball coach?