GPz750 Injection

[knut]

I guess finding injection parts would be a non starter ?

Early unitrack?

750 turbo injection setup would work on it wouldn,t it ?

[tlc]

It would make perfect sense for it to be a Japanese market bike.

Infact it`s a Z2.

[RUDDY]

The Japanese market brochure calls it a Z750GP

[garyd]

Apart from the spacing to match the 750 cylinders, I would have thought everything from the 1100b2 would be the same. This style of injection delivered fuel by metered amouts so were not dependant on injector size.

If you can source an injector rail from a 750 turbo and then the B2 stuff that should be all you need as you aleady have the 'brain' that's set up for 750.

[Z1parR]

I guess finding injection parts would be a non starter ?

Early unitrack?

750 turbo injection setup would work on it wouldn,t it ?

I would imagine some of the lads on here will have some answers

http://www.750turbo.com/home.htm

[j.b]

Nice find ruddy....the cylinder spacing for the throttle bodies on the 750turbo is the same as the 1100. The main differences between the tb's is the 1100 have a larger internal bore but the turbo uses bigger injectors, that's why I run 1100 tb's on my turbo with bigger injectors.
Maybe your bike would have run with the turbo tb's on 1100 injectors?
Have a look for the engine temp sensor, back of the barrels between cylinders 1 & 2. And the airflow sensor on the airbox. If these are still fitted there's not alot more you'll need

[RUDDY]

I won't drag this thread out much longer as I would guess it might not interest most on here but I've done a bit more digging. It appears there are quite a few of these bikes for sale in Japan, link below should bring some up. If you also use the link to search for other Z's for sale in Japan, they ain't cheap. There are 3 Z1100R's on there , one is approx £13k. Also there's several GPz1100's around the £8k range.

I've managed to sort a set of 750 turbo t/b's complete with fuel rail and injectors, hopefully a set of 1100 ones as well. I also found a NOS harness from the ECU to the injectors so these parts should help.

J.B, I'll check the bike over for the temp sensor but I think the air box has been changed when the carbs were added.

Cheers, Paul

Hope this link works, you may have to paste the link into Google Translate to make things clearer !!

http://www.goobike.com/bike/kawasaki__z750gp/

[janluke]

great thread

I'm interested in your progress and am fascinated that there's a bike in the range I knew nothing about.

good luck

[RUDDY]

Have a look for the engine temp sensor, back of the barrels between cylinders 1 & 2. And the airflow sensor on the airbox. If these are still fitted there's not alot more you'll need

If I'm right this is the temp sensor, I'm pretty sure the air box is the same as my UK 750 and from some of the photos of the fuel injection model the air box looks deeper, will investigate this further thru the week.

I was planning to strip my ELR next for a resto but I think this bike may jump the que ..

Cheers, Paul



The air box on this injection is different to my bike, it looks deeper, GPz1100 ?

[steve.w]

yep thats the temp sender .. the airbox is probably unique to the bike .but ul get round it some how mate .. keep the thread going uve got summit rare

[RUDDY]

A bit of progress on the parts front, I picked up a set of 750 turbo throttle bodies and a set of GPz1100B2 bodies for comparison, then .......

The remains of a 750 injection appeared on EBay showing pics of the t/bodies and air box laying amongst scrap basically, a bid of £250 saw me collecting the 'bike' today.

So, having got the bike home it was time to sort the scrap, the frame is definitely a Jap import 'KZ750R' VIN frame, engine number is right and the head has the temp sensor in place.

Onto the parts, this is the important stuff

Air box - deffo unique to the 750 injection I think, its not the same as a GPz750 as its deeper and it's in two parts plus it has the air sensor in it, the front part is similar to a GPz1100B2 one that I have but the back half totally different. It has no part numbers on it that I can find, the side trims have a screw at the top and a push type fitting on the bottom.





Fuel pump, would appear to be the factory pump, same bot as fitted to my bike, will get 12v to it and see if there's any life in it



Throttle bodies and regulator, measured these against 750T and 1100B2, they are the same as B2.



ECU, the KZ750V is the designation given to the injected 750's, will it work , who knows but there's also one on my bike so possibly a spare or possibly two nackers ...



Loom, a handy spare as I also have a NOS one



This relay was plugged into the loom ? Sure it's something injection related as I've seen them for sale for B2 1100's



So at some point in the future I'll have a go at getting it back on injection.

Cheers, Paul

[tlc]

Keep this project thread going won't you.

[RUDDY]

Could one of the moderators move this thread to the projects section ?


Well this morning after soaking the pump with WD40 overnight I removed it from its bracket , the part number is now visible and confirms it is the original pump, with a couple of wires connected up I gave it 12V and it spun up freely with no horrible noises, in fact it was nice and quiet for this type of electric pump.



Next I did a bit more investigation of the airbox, definitely no part numbers moulded into the plastic, it's also not the same as a B2 1100 front as I thought yesterday, it has a different side profile.

Couple of pics below, first pic shows injection (right) compared to GPz750 carb (left), carb box is narrower and one piece, filter housing has a screw top whereas inj top pulls off.



This pic gives a profile of the side pieces, on the left is GPz11 , middle is injection, right is Z1000J.



I need to get out more don't I

All the best, Paul

[ADRIAN H]

I need to get out more don't I All the best, Paul

Not at all, very interesting.

[nanno]

That's one hell of a nice set of riddles to follow... Please keep it coming!

Cheers,
Greg