Join Date: Mar 2004
Location: Northern California
Unfortunately there does seem to be an issue with the water pumps in some of the ZX-10R's, as I too started to notice coolant dripping from under my bike upon coming home from a ride, about a month ago (bike has 3K miles on it). After checking the tightness of all fittings, I finally determined the fluid was coming out of the inspection hole at the back/bottom of the pump, due to coolant leaking past an inner seal on the rear of the pump housing.
My dealer allowed me to do the work, in pulling the pump off myself, and then getting a replacement provided under warranty, which I then installed. While I still had the old pump, in opeing it up, I found a lot of very fine aluminum metal shavings that had settled in the rubber O-Ring that borders the perimeter of the outer cover plate of the pump. Obviously signs of something rubbing/wearing away, within the pump.
My suspicion is that the material of the pump housing must have been gradually worn away somewhere around the shaft/seal area, until the clearance finally got large enough for coolant to leak past.
What's odd is that the bike would sometimes drip a solid stream of coolant at one moment, when started up or returning from a ride, and then allow me to ride for several hundred miles that same day, with numerous stop/sit for a bit/and start again, without showing any more leakage that day. Very odd!
If wear on the metal of the pump housing and/or shaft was the cause of the fine metal shavings, and leaking pump, I hope that Kawasaki has had time over the last 10 months to realize the shortcoming of the pumps (which they buy from an outside vendor), and have some modifications done to the construction of the one that I now was given as a replaement. Time will tell, I guess.
Hope this personal experience on the pump leakage problem might be of help.
Last edited by Gary J; 12-26-2004 at 10:15 PM.