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My new to me '89 was showing signs of coolant getting into the gearbox oil, which is one of the things I'm investigating while tearing my motor down. When I took the water pump out I found the area of the shaft where the seal rides is badly scored. Unfortunately the gear/shaft is NLA from Kawasaki. Doing some part number research suggests that the E-models used two different part numbers of this shaft.

13234-1089 for '89-'90
13234-1092 for '91-'94

Does anyone have any idea the difference between these two part numbers? I'd like to determine if they're interchangeable or not. If anyone could post pictures of this part from a '91-'94 bike and possibly take some measurements, that would be a big help, too. For that matter, does anyone have a good condition gear/shaft that they'd sell me? Thanks a lot.

They started using two water seals in '91 so they probably altered the shaft a bit to conform to the new seals. Or vice/versa...

That would be my guess anyways, so you're probably best off getting with the pump shaft for your specific model year. If you can only find a 91+ shaft you may be able get away with buying the extra seal, I doubt they made any mods to the engine cover.

Edit: I was wrong I checked and engine right side covers part #s changed after 91. Would not risk it.


You can spot the difference in this two pictures:

13234-1089:



13234-1092

Just replied to another post about this too. As seen in the above pictures, one has a wider section to the right of the gear that acts as a spacer. For the shaft without that, the corresponding inner clutch cover has more spacing built in.

I found this out when I cracked the inner clutch cover on my E-series and found out I had to swap the water pump shaft as well (luckily I had all the parts spare anyway).

I think I have the shaft in the bottom picture to sell now I think about it. But I'm in Australia so it would need to be someone not in a rush :P

Thanks for the responses, guys. That helps a lot. I can't find a '89-'90 shaft anywhere but I have a lead on one of the '91-'94 shafts. It clearly isn't exactly what I need but looking at the pictures gives me an idea. Let me run it past you guys to see what you think. I know a skilled machinist that will do small tasks for me, so what if I had a spacer made up that would fit over the shaft of the '91+ part to bring the shorter collar on the '91+ shaft to the same dimensions as the '89 shaft?
Joshmcmillan, since you've dealt with this same conundrum before you probably have much more insight than I do. Do you think this would be a viable plan? Also, I'm interested in the shaft that you might have. Would you be willing to take a look and see if you have it? I'm not sure how much shipping would be from Australia to America but it might work out a lot better than the (expensive) one that I'm looking at now. Thanks again.
Also, I made a donation to the site earlier today so my PMs should be up and running soon.

Hypothetically I think that would work. I think I was considering getting my machinist friend to use a lathe to get rid of the 'thicker' piece. So it does seem like my spare would be the one you're after (purely from memory).

How much is the other one you're looking at buying? (if you don't mind me asking). Postage from Australia would be $10-15 to the USA.

The reason I can't check now is because I leave some of my bike spares at my parents (they have a farm and I have a house), and I won't be going back there for 1.5-2 weeks. Are you in a hurry?

Thanks for the insight. That would be a bit longer than I'd like to wait for the shaft. I have a feeling that the bike would be done and waiting on it. The one that I'm looking at is at a dealer so it will probably be at list price, around $45. I guess that with the high cost of shipping and the wait from Australia, I'll go ahead and buy this one. Thanks for the offer, though.

No worries, sounds like the way to go.

I think your plan should work. Notice after the 'thicker' bit of the shaft near the gear, there is also then a 'thinner' piece. I can't remember if that had any significance... but just be aware as you might need to get that bit machined into yours at the right spot also... shouldn't be any trouble for someone with a lathe that knows how to use it.

Well, I'm back to square one. The shop that showed one in inventory didn't actually have it. I'm going to continue to look around for one but I might need yours after all. I'll let you know in within a week or so if I do.
Another machining solution occurred to me, too. It might be possible to use a lathe to turn down the scored shaft by a bit, then press a sleeve over it and machine it to the proper (8mm) diameter. Just another possible solution that I might investigate. I'll be headed over to my machinist's shop soon and I'll run the idea by him.