How about ZRX carbs or Bandit carbs?

OK here's an idea. Maybe I should go for the modern upgrade and pick ZRX1200 carbs or Suzuki Bandit 1200 carbs.

Anybody tried this? They're easier to find in decent shape cause they aren't so old.

The ZRX ones have an electronic thing on the side and I dunno what it does. Just thinkin...

Bandit carbs may work but ZRX most likely won't. I know that the oil cooled 750/1100 Gsxrs have carb spacing very similer to a Z1/Kz900/1000. I have a set from a Gsxr750 in my garage that I'm not sure to do with but I do know that they will fit with some massaging.

Later, Doug

a bit of research reveals that the ZRX electronic thing is a throttle position sensor for the computer, elec ignition, etc. Soooo... I'm guessing I can ignore it, plug it, snip it, whatever.

Nelson wrote:

a bit of research reveals that the ZRX electronic thing is a throttle position sensor for the computer, elec ignition, etc. Soooo... I'm guessing I can ignore it, plug it, snip it, whatever.

But you're still going to have to worry about spacing on the ZRX carbs. Kz and oil cooler Gsxr/Bandits have carbs 1-2 and 3-4 paired while the ZRX and the ZX11 which the motor is based from has the carbs evenly spaced.

later, Doug

Hmm.. well I've found this on a ZRX forum:

"The ZRX, like the ZX11, GPz900, and FJ11/1200, are spaced 77-85-77."

I've also seen ebay pictures that clearly show the middle gap is bigger than the sides. I just have to measure mine now.

The spacing on the KZ carbs is 77-93-77 - One of the big reasons the GPz carbs won't work is that not only is the spacing a shade wide but it is hard to stuff the bigger outside diameter venturis in BS34 carb holders... I haven't been able to get a GPz900 carb fitted...

As far as the Bandit 1200 carbs, not really sure. The carb holders are angled a bit on the Bandit head so the cylinder spacing isn't really the issue. Same holds true for the earlier GS750/850 using BS34 carbs... The carb holders for 2&3 are canted towards the middle of the rack and while you can force-fit a set, it is really hard to get a good seal.

The TPS on the Bandit carbs is essentially a vacuum line going to the igniter box. This vacuum varies and tells the box how to adjust the ignition advance. Pretty much the same TPS arrangement is on the Kaw Vulcan as well. I suspect it could easily be removed.

The worst thing about the Bandit 36mm Mikunis on the Bandit are the sync ports. All are VERY tiny using 1/8" plugs and it is almost impossible to recap the sync ports after sync-ing those carbs... The ports are located under the choke arm mechanism and all point out to the left side of the bike. Stupid arrangement. The carbs work pretty much like BS34s otherwise.

My dream slowly dies... Thanks for the good info George even though it's not what I was hoping to hear!

Hi, new to this forum (4 years late), but I thought I'd let you know that I have had zx900R carbies (34mm) on my Kawasaki Z1R 1978. To fit these I spaced the two middle carbs by welding spacers (including the choke activator). These were 100% better then the standard units in response, power and fuel economy.

I now have ZRX1200 carbs (ebay $150) these are 36mm.I don't use the butterfly sensor. All that was required was the main jet changed to 132 and the pilot to 40.5. With 1080 MTC pistons Z1000J valves and mild speedway cams this things flies ( 11.3 1/4mile) and the fuel economy is around 58mpg (australian) at a steady 110kph.

this bike needs it's own thread where you show us much more pictures :evil: .
and,
tell us all aboout everything that has been done to this bike over the years,and we all read and look at the thread with our mouths open and drool on our keyboards.

just sayin' :whistle: .

welcome.

leon

531blackbanshee wrote: this bike needs it's own thread where you show us much more pictures :evil: .
and,
tell us all aboout everything that has been done to this bike over the years,and we all read and look at the thread with our mouths open and drool on our keyboards.

just sayin' :whistle: .

welcome.

leon

yes! what leon said.
That bike has some great parts adapted to it. We need some details Bozo.
Those Keihin CVKs are great carbs on my ZRXs, been wanting to do this for a while now.
I'm seeing aluminum adapter plates bolted to your head, what intake manifolds are you using? I was thinking of adapting the Rex manifolds in a similar fashion if the J model manifolds won't work.

EDIT: Just went through your other thread Bozo. Very nice!

Check my intro thread about the carbies, ZRX1100 and 1200 have the same carbies 36mm, the flanges were machined to flow from 36mm to the Z1R intake, I used GPZ900R rubber manifolds to these adapters, as stated before I have slight improvements and a 1075(not 1080 as I first stated). The standard carbies were replaced with GPZ900R (34mm) carbies, this was an improvement especially in the mid range.
When I added the ZRX carbies the difference was remarkable and it definitely showed. In the matter of fact I got caught out and nearly lost my grip on the bars but you couldn't wipe the smile off my face for a month.

I'm wanting to build a 1075 in a bad way, just too many projects.
Yah, I like the CVKs. You ought to try them when attached to a ZZR12 cammed, 1224 Muzzy kitted and piped ZRX! :whistle: :woohoo: :evil: