GPX750R resurrection

[javaman]

Great to know there's always a way

So what sort of bearings are you replacing it with? Same type or the regular ones from bearing shops?

When I changed mine I just brought them the the shop for similar one and got a pair for the pricely sum of $20 . But honestly I did not know/look at what type they were!

[Mister_T]

So what sort of bearings are you replacing it with? Same type or the regular ones from bearing shops?

I have a conventional 6006 deep-groove ball bearing (same dimensions, 30x55x13) waiting to go in. It is of the rubber sealed on both sides.

[Mister_T]

I was considering giving the sprocket carrier a shot of black paint before it goes back on, but as it seems to be painted with something similar to the engine, it occured to me to hit it with some S100 Engine Brightener instead.

Before EB. The sprocket carrier is not perfectly clean and probably never will be.

gpx750r_sporcket_carrier_pre_S100_EB.jpg (76.69 KiB) Viewed 15140 times

After EB:

gpx750r_sprocket_carrier_post_S100_EB.jpg (73.74 KiB) Viewed 15140 times

It seems to have improved the look.

[Mister_T]

I had painted the new rear sprocket gold to match the new goldy chain:

Bling!

gpx750r_gold_sprocket.jpg (43.17 KiB) Viewed 15130 times

I umm'd and ahh'd for a while and decided to go with basic black instead:

Black is the new black. How did people paint stuff before coathangers were invented?

gpx750r_black_sprocket.jpg (42.02 KiB) Viewed 15130 times

The new sprocket carrier bearing should be a breeze to replace next time, if needed.
Perhaps a future owner will thank me:

As seen from the cush drive side

gpx750r_new_sprocket_carrier_bearing.jpg (49.64 KiB) Viewed 15130 times

29 years of somebody else's shit to clean up. Looks like next winter is sewn up. Oh well, there are probably too many tourists in the Bahamas that time of year anyway:

I may well be a dirty old man, but I don't want to ride a dirty old bike

gpx750r_dirty_arse.jpg (51.12 KiB) Viewed 15130 times

[Mister_T]

While I had the front sprocket cover off, I figured it would be a good time to clean the shit off the clutch pushrod to give its seal a better chance of survival.
Just as well.

When I slid out the pushrod, I found a groove on it, right where the seal lip sits. Fark Orf.
I expected some wear from lots of sliding in and out but not the groove:

Maybe this is Kawasaki's answer to the ScottOiler

gpx750r_clutch_pushrod1.jpg (47.32 KiB) Viewed 15128 times

Let have a look from another side and a different angle:

Not cool

gpx750r_clutch_pushrod2.jpg (52.89 KiB) Viewed 15128 times

Luckily for me, Kawasaki made the pushrod quite symmetric so all I had to do was clean it up and flip it around so that the groovy end is inside the engine, giving the pushrod seal a better surface to work with.
While I was having a smoko I gave the bike a maintenance startup and by golly that pushrod does like to spin from the oil drag. That would have an affect on the seal in the long run as well I suppose.

[javaman]

That's a similar setup to my GPz.

How is that push rod grooved like that as they don't rotate (?)

[Mister_T]

How is that push rod grooved like that as they don't rotate (?)

While I was having a smoko I gave the bike a maintenance startup and by golly that pushrod does like to spin from the oil drag. That would have an affect on the seal in the long run as well I suppose.

[javaman]

The oil can spin the rod? Interesting, what would have caused it - leak?

When I took mine out it was mint and smooth. I had to be a bit paranoid too which side goes to which (they're the same!)

[Mister_T]

Oil flow or gearbox diagrams for the GPX will show a lot of oil running through the shafts, they need it.
The pushrod runs inside the first motion shaft.
The first motion shaft is driven by the clutch.
Lots of bikes with a hydraulic clutch would be like this.

gpx750r_gearbox_oil_flow.GIF (17.29 KiB) Viewed 15090 times

[Mister_T]

One sidenote about the clutch pushrod (part number 13116-1126) is that all of the big online Kwak part suppliers show this part to be NLA (No Longer Available).
That would be because it appears this part was not used on any other Kawasaki, it was unique to the ZX750F.

I suspect that a longer pushrod from some other model could be shortened by any competent machinist for a couple of six-packs of beer, the trick is to know which bike had a longer pushrod of the same diameter.

[Smitty]

One sidenote about the clutch pushrod (part number 13116-1126) is that all of the big online Kwak part suppliers show this part to be NLA (No Longer Available).
That would be because it appears this part was not used on any other Kawasaki, it was unique to the ZX750F.

................

I would also check the first of the ZXR750s (ZX750H?) ... which used the same engine/gearbox as the GPx

[Mister_T]

I would also check the first of the ZXR750s (ZX750H?) ... which used the same engine/gearbox as the GPx

The ZX750H1 clutch pushrod is a different part number (13116-1137) and may be NLA as well.

At least the pushrod seal seems be very available. That part was used from the 1980 KZ550 to the 2008 Vulcan 1600, going by http://www.partzilla.com/parts/detail/k ... -1017.html
However, this seal is not one that you would find in the catalogues at your local CBC bearing shop as I found out, genuine Kawasaki it has to be.

[Mister_T]

Got the new chain and sprockets on and only briefly enjoyed that unique feeling of new chain and sprockets when, after a brief test ride, I stood back to admire my handiwork and noticed this:

gpx750r_short_pin1b.jpg (80.81 KiB) Viewed 15037 times

The short pin does not look like riveted head has broken off, it does not look like it was ground down to shorten the chain and was done wrong (the chain was supplied with the spec 110 link length), the pin just looks too short, like it might be from a 520 chain instead.
I checked the other side of this link and it looks correct. I then checked all the other pins on both side for more like this one but there are no more.
Just as well I installed the chain with this side facing out.

I won't wave my arms about and name names and cast aspersions until I hear back from the supplier.

[Mister_T]

It could have been a nice day for a ride here in Melbourne today, but I chose to do the clutch hydraulics instead due to a minor drip from the clutch master when in use.
I know clutch hydraulics tend not to get much attention, but even this surprised me.

Geez, where does all the sludge come from?

No frikkin wonder it started leaking

gpx750r_clutch_master.jpg (111.51 KiB) Viewed 14997 times

[javaman]

That's much worse than mine. Mine had this red-blackish particles. I had to flush it three times to have a clean hydraulics.

I read somewhere that those black particles are actually rubber from the hose

If you're done with it we're riding on Monday to Jamieson. Meeting Strika at Eildon servo.

Here .. to entice you


Sunny.
Possible rainfall: 0 mm