just wanted to share something in case it helps out. I discovered that my radiator fan was not working. I traced the problem to the fan switch that is located at the bottom left of the radiator and i'm told is very expensive to replace. On inspection I found one of the spade connectors ( i don't know what the connector is called that's just a guess) had corroded and snapped off. I checked to see of the fan was working by shorting the wires, and it was

Result!

I hope this helps.
Whilst I'm here, can anyone tell me if my temperature gauge is being normal. I thought it was it was not working but it must be. It only moves up to the first mark on the gauge and I kind of thought that perhaps at normal running temp it should be at the halfway point. When left idling (waiting to see if my radiator fan was gonna kick in) it did rise and the fan kicked in at just under the half way point. Is this just my zxr or does everyone have the same readout from the temp gauge? Its an H2 by the way. Thanks all.