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Getting ready to send my cylinder block to the machinist, and I had been procrastinating about how to remove the water pump without messing anything up. I tired at first with some locking pliers and couldn't get the impeller to move, I was afraid I would break it that way.

I made this puller using some 1/8 inch cold-rolled steel rod. It was just strong enough to remove the impeller. I don't know what the dealers used to do this work, was there a factory tool to pull these apart?

this was not an easy task. I had to tighten the bolt up until the arms started to bend and then tap the bolt to slide the impeller out about .010" at a time. If I tried to reposition the puller, the o-ring on the shaft would pull the impeller back and I would loose my progress.

It did come apart without damage to the impeller or the housing.

Well, good for you - it all worked out . They never come apart easy. I used a small upholstery hammer and taped shaft and impeller out from the other end as one piece , then lots of soaking in wd40 for several days.
While waiting on the parts soaking I checked both Ron Ayers and Kawasaki Parts Nation and both sellers had these parts available -but now they don't- or at least not on their web sites.
It was good you could salvage the parts you had

I though the seal housing had to come off in order to get the shaft out? Looking at it again it appears not... so I could have pulled the impeller off with the shaft... now I feel dumb






I would not want to do this job with the engine in the bike, that would be no fun at all...

That puller is ideal! And you're right, that job isn't fun with the engine installed.

Nicely done Tyler! The rest of us have learned something. That's quite a contribution to the site.

Bill