carb problem?

Stephen Hampson shampson at
Sun Jul 22 08:45:19 PDT 2007

Apologies to those in the know, dynojet jets and keihin jets are different
sizes. I cant remember what the exact correlation is but dynojets are bigger
than keihin. ie a 128 dyno maybe the equivalent of a 140 keihin.


-----Original Message-----
From: Steve Northrop [mailto:blackgpz at] 
Sent: 22 July 2007 15:30
To: Kawasaki GPZ1100 discussion
Subject: Re: carb problem?

A washer and another clip, three washers, whatever. You must duplicate the 
thickness of the nailhead on the stock needle or it will rattle up and down 
in the slide. Dynojet jet numbers are stamped on the top of the jet, Keihin 
jet numbers are stamped on the side. Dynojet says to use their #104 main 
jets for a stock exhaust, the #108's for an aftermarket exhaust.

Steve in Western NY
'96 GPZ1100
'02 Daytona 955i
"You Can't Fix Stupid", Ron White

----- Original Message ----- 
From: "Jameson, George E." <george.jameson at>
To: "Jerry Clair" <darkclarity2k at>; "Kawasaki GPZ1100 discussion" 
<gpzlist at>
Sent: Sunday, July 22, 2007 7:13 AM
Subject: RE: carb problem?

> Try looking at this, these are the same carbs you have.  Some of the
> pictures are missing and the airbox instructions pertain to this bike .
> But they are Keihin  36's.  This kit manufacturer uses a total of three
> washers and 'e' clip position to position needles vertically.  I don't
> know about 2 clips either.  Break out your reading glasses keihin jet
> sizes are stamped on the jet.
> -----Original Message-----
> From: Jerry Clair [mailto:darkclarity2k at]
> Sent: Saturday, July 21, 2007 11:22 PM
> To: Kawasaki GPZ1100 discussion
> Subject: Re: carb problem?
> 2 clips? WTF. How do I know if I have a 108?
> Pilots are at 2 1/2
> Steve Northrop <blackgpz at> wrote:     The baseline
> installation is the clip in the second groove from the top.  There needs
> to be a washer above the clip and another clip in the first groove,
> otherwise the white plastic retainer won't hold the needle down tightly.
> When  replacing the white plastic retainer, make sure the feet don't
> cover the  slide lift hole in the bottom of the slide. The main jet
> should be a 108 and the  pilot screws 2 1/2 turns out. Again, these are
> the baseline Dynojet installation  instructions.
> Steve in Western NY
> '96 GPZ1100
> '02 Daytona 955i
> "You Can't Fix  Stupid", Ron White
>    ----- Original Message ----- 
>   From:    Jerry    Clair
>   To: Steve Northrop
>   Sent: Saturday, July 21, 2007 4:29    PM
>   Subject: Re: carb problem?
> The clip is on the 3rd from the top. hmm, is that    right?
> Steve Northrop <blackgpz at>    wrote:
> That's the needle that dangles from the slide. You can see it's tapered
> at the end. The slide raises and lowers the needle relative to a fixed
> orifice depending on engine load. The main jet is below the needle and
> provides the fuel that is below the fixed orifice. Whenever I have the
> carbs      off and the slides out, I take a little crocus cloth
> (very,very fine      sandpaper) and smooth out any rough spots,
> especially on the "wings". Inside      the slide is a white plastic
> retainer that just lifts out, then the needle      can come out. If the
> needle has 'slittle grooves at the top with an "e" clip      in one of
> them, a jet kit has been installed. If the needle just has a nail
> head, it's stock.
>     Steve in Western NY
> '96 GPZ1100
> '02 Daytona 955i
> "You Can't      Fix Stupid", Ron White
>            -----        Original Message ----- 
>       From:        Jerry Clair
>       To:        blackgpz at
>       Sent:        Thursday, July 19, 2007 3:27 PM
>       Subject:        Re: carb problem?
> Ah! Master Steve,
> The problem is that I don't know        WTF I have. Nor do I know
> very much of what I'm doing.
> 1. But I sure        can compare the springs from my stocker to No.2.
> When I pull the        diaphram up & out (thats the main Jet dangling
> off the slide        -right?)
> 2. Shouldn't the slides be very smooth in        operation?
> 3. um, what else is down inside        there?
> blackgpz at wrote:        Jerry,          did you say you
> thought there was a Dynojet kit installed? If
> so,          compare the diaphragm springs to the stock ones. If they're
> shorter
> than stock they are NFG. These kits are notorious for an off-idle
> bog
> if you use their springs. Replacing with the stock springs
> solves the
> problem.
> Steve
> ----- Original Message          -----
> From: Jerry Clair
> Date: Thursday,          July 19, 2007 12:46 pm
> Subject: carb problem?
> To: Kawasaki GPZ1100          discussion
>> OK, so I'm not the best          mechanic, when it comes to carbs.
>> Bye-bye box. wow, what a pain          and poor design. and the
>> reed valves, really are not like a PVC?          I know we just talked
>> about this but whats a good wat to plug          it?
>> So, I yank the suckers off, and found the pilots at          3 turns,
>> instead of 2 to 2.5 turn, no biggy. Idles great now.          The
> slides
>> made different sounds from one another and could be          smoother.
>> Diaphrams intact and everything basically very          clean.
>> Still, any acceleration and she bogs to a stall.
>> So, I'm considering taking the known good carbs off of
>>          bike 1, and test bike 2 even though, the test will not have
>> the          air box and using the muzzy as opposed to the stock
>> one bike 1.
>> I'm considering welding a handle to the darn tank at          this
> point!
>> Think I should empty the tank first. J/K
>> Jer

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