Reroute all pipes that go into the atmospheric pressure chambers of the carby. The carby overflow hose is the only one to leave going down I believe (without looking at my bike cause I am too lazy to go to the shed!).
Thanks cactus jack, I did re route the top two hoses up into the airbox, as I was told by the dealer these two are the ones that 'suck' and the other two 'blow' !!!!