250-500cc Water in Gearbox from water pump.

Hi,
I had water in my gearbox from the water pump. I pulled out the pump and changed the seal. The shaft and bearing looked ok but the seal was destroyed. Put the new seal in and put it all back together. It lasted one ride and the water found its way back in there. Shoild I have replaced the bearing and shaft aswell?
Any info would be appreciated.
Cheers Peter.

You sure the water is coming through the pump? If you ride through deepish water the gearbox vent tube sucks water into the box. I used to regularly find water in the gearbox oil until I moved the pipe from dangling down to up into the airbox.

I allways replace the bearing with the seal,the shafts are usually can be polished up unless the seal grove is deep. The bearing going bad is what usually takes out the seal to begin with.

Windsurf, It is definatly the seal. Glenn Thanks for the advice. the shaft looks ok but for the sake of a few dollars I will replace it so I dont have to do it again.