i tried clearing my vent tube also, but still rattles ! i've grown used to it, & with my exaust being so loud, i don't hear it all the time, & i'm thinking on investing in a good set of ear plugs. CHRIS 



HELL YA !
thanks wuputt, for the money saving tip ! CHRIS 
Look under the cap and see the little tiny nipple,, look at the tank, see where that little tiny nipple goes? blow that outbeeZLbub said:Holy Ess-Nuggets!
My "new" ZL900 buzzes like crazy! The higher I rev the worse it is.
It's almost loud enough to hear over the iPod!
If I put my hand on it and apply even a slight bit of pressure it stops, so I'm positive it's the cap assembly.
What's the deal with the vent tube? You guys blow compressed air INTO the tank?
My "new" ZL900 TANK buzzes like crazy! The higher I rev the worse it is.
when the bass hit my vision would blur.... 