2001 Ninja 500 Impeller Shaft

[vividumus]

How do I remove the impeller shaft from a Ninja 500?

[BrianTSmith99]

I would recommend getting a factory service manual. There are two for our bike. A "generic" (85-90 EN400/EN450) and a "specific" (1994-2009 Ninja 500/GPZ500S). Look first in the specific and it frequently refers to the generic for stuff that has not changed.

The most I have gotten into mine is adjusting the valves.

I can look up something for you if you wish, but I'm about to call it a night.

Brian

[vividumus]

It would be very helpful if you could tell me what I am suppose to do.

I have to order the service manual and since the bike is my only form of transportation, it would expedite me getting back on the road.

[GREENISBEST]

I assume you mean the Water pump impeller ?

Have you got to the point where you can see the impeller ? If so it is a left hand thread so do it up to undo it..

[vividumus]

Right, I have the water pump impeller off, so the shaft is just screwed on as well? I tried unscrewing it, but something turns on the other side of the disc the shaft is connected to, how do I stop it turning so I can unscrew it?

[GREENISBEST]

Ok i have included some pics to assist.

1st one shows the impeller removed.
[A] Impeller Sealing Seat Surface
[b] Rubber Seal
[C] Mechanical Seal Diaphragm

Which leaves the plate that centralises the impeller shaft and houses the mechanical seal Diaphragm (C)




2nd pic shows this plate removed to allow access to the mechanical seal.
This will also reveal the shaft..

Oh and this plate is located via 2 dowels and will be quite difficult to remove so be very carefull not to break the plate !!!



Hope this helps

[vividumus]

I have the housing removed already. The shaft is revealed, but I cannot figure out how to remove the shaft.

The parts breakdown makes it look like it is screwed in, but I cannot unscrew it.

The reason I am trying to remove the shaft is that its threads broke off into the impeller, so I need a new one. I want to take this one out an install another. I asked my the parts department at my dealer how to do it, and they said they had never done it before on an EX 500, but it is probably held in by clips. However, there are no clips on the exterior surface where I can see the shaft.

[GREENISBEST]

If i remember right and it's been a while since i had one apart, There is a clip that holds the shaft in the crankcase keeping it engaged with the oil pump drive.

You should see the method by which it's fixed in by removing the oil pan.

Just looked a pic i took the last time i had one apart and it looks like it's screwed into the gear that drives the balancer shaft !

I'll have to give it some thought as removing the oil pan may not facilitate removal

[GREENISBEST]

Here's the pic i mentioned, RED arrow pointing at your impeller shaft.

I'm woundering if the crankcase has to be split to remove the balancer shaft complete with gear before you can remove the impeller shaft or maybe removing the oil pan will enable you to hold that gear whilst undoing the shaft. (Holding it present a new problem of it's own)

I will further investigate the method of fixing later at work.

[vividumus]

This is looking to be a fun project. Thank you very much for your help.

What problem does holding the gear create?

[GREENISBEST]

Originally Posted by vividumus

This is looking to be a fun project. Thank you very much for your help.

What problem does holding the gear create?

I have since discovered the impeller shaft is just screwed into the balancer shaft gear.

It's a case of get a good hold on the sucker and undo her !!!!!!

[vividumus]

Thank you! I got it out. I just put it in gear and unscrewed it. I apologize for making you go through all these scenarios.

[GREENISBEST]

Originally Posted by vividumus

Thank you! I got it out. I just put it in gear and unscrewed it. I apologize for making you go through all these scenarios.

No problem whatsoever, I've learned something myself