Water Pump Question

[wreck-n-roll rik]

Went for a ride today adn the bike dumped all the coolant out.  When I got back home and gave it a good check, it appears that the water pump is not working.  When I pulled the pump cover and spun it by hand it did not feel like there was a gear on the back side of the shaft.  How hard are the pumps to rebuild and does anyone have instructions listed some place?  Any good places toorder from?

[hughes]

You need to buy yourself a service manual first. I'm going off memory here but I think the water pump shaft itself had a gear made on the end of it and that was driven by a plastic gear (I'm not sure)?? The plastic gear I'm thinking of might be the one for the power valve actuator. You'll need to remove the clutch side cover to get a better look at. The impeller is just bolted to the water pump shaft.

[KXcam22]

The pump rebuild is easy.  ABEC7 bearings, you can use skateboard ones or I got some super quality ones from a bearing shop for $2 each.  The seal you have to get from a dealer.  Get a pump cover gasket while you are at it.  The small bearing in the main case is a little interresting to get out but when you get there post and I will post a pic of the puller I made out of an old bolt. Cam.