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Discussion Starter #1
All,

Like the sign says, I need a replacement fuel pump for my ‘82 GPz1100 (KZ1100B2). Part number is 49040-1003, long discontinued and when it was available it was knocking on $500. I heard a rumor this is identical to the pump in a ‘79 Cadillac Eldorado (!). Can anyone confirm/deny?

This same pump was used on the 81 GPz, the 750 Turbo and some other fuel injected bikes at that time.

Any potential leads or confirmation of the rumor would be greatly appreciated! The bike is sitting in a shop 100 miles from home with the pump confirmed dead, and I would like to get it back!

Thanks!
 

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Discussion Starter #3
Walbro Fuel Pump GSL393 is verified. Make sure you get the inlet and outlet fittings for it.
You may have to buy an installation kit separately.

If you need a regulator, a Standard PR134 is verified.
Thanks! I just looked at it, and it appears different from the Kawasaki pump. When you say it’s ‘verified’ do you mean that it works, or that it is the SAME? I see that the fuel inlet is substantially smaller than the 12mm inlet on the Kawasaki pump, which is what inspires my question.

Following up on an earlier tip, this Carter pump for the Eldorado appears to share external characteristics with the Kawasaki pump, although I am only able to compare photos so I can’t see if they have the same dimensions:


Thoughts?
 

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Discussion Starter #6
An excellent point. I was looking at external size characteristics and not paying attention to fuel pressure and volume. I imagine the GPz volume needs are low but pressure needs may be high. We don’t know what the original pump was rated at though, do we? What is your pump’s rating?
 

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Discussion Starter #8
Stock pump inlet is 12mm and outlet is 8mm, I’ve been told by the mechanic....
 

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Discussion Starter #9
...and he also confirmed that 32 PSI is more than adequate for this application. I went ahead and ordered the Carter Cadillac Eldorado pump which reportedly is identical to the Kawasaki pump. We will know in a few days if that’s correct or not.
 

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Discussion Starter #11
I would monitor it for a lean condition, with that pump.

Kawasaki specs are [email protected] and 36psi, when the throttle is opened.

I don't believe the Carter pump is equivalent to Factory OEM, based on the output stated
(32PSI maximum), in the link.
Ah-ha! Now THAT would have been great info to have! Unfortunately my mechanic has my shop manual so I couldn’t look him up and trusted him to do so. I guess he guessed. :(

I already ordered the pump but perhaps should order the Walbro pump as well....

Thanks!
 

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Discussion Starter #13
Okay, good. In thinking about it, I couldn’t imagine all those cars staggering around with low fuel pressure, and figured if it’s good enough for all those larger engines it should be able to handle the demands of a 1.1 liter four.

Fingers crossed!
 

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Discussion Starter #15
I don’t know yet. It was ordered and shipped Monday. It may not have arrived; even if it did it may not have been installed yet. I will let you know as I learn more.

When the bike last ran the fuel pump seemed fine and everything downstream was all screwed up. The pump since failed and needed to be replaced. Now I’m likely back where I started and the fun begins....,
 

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Discussion Starter #17
Are the external characteristics as identical as they appeared to be? I’ve never actually seen either pump in person, only photos.
 

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Discussion Starter #19
There was a flurry of activity on my bike, then nothing. The race season is finally starting and race customers take priority at the shop so mine has been temporarily sidelined.

Sigh....
 
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