Tai Johnsen wrote on Friday, May 09, 2008 - 10:30 pm:I'm Pretty sure that 'chamber' is a special plenum designed to aid the motor on instantaneous throttle demands.
My CBR 1000 had a similar chamber.. basically it is a short term air reserve that can be drawn on when you stab the go pedal.. I'd leave it there. If it wasn't beneficial, toyota wouldn't have put it there