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How about ZRX carbs or Bandit carbs?
- Bozo
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To cut a long story short we (4 of us) went for a ride on some back roads, they decided to line up and do top gear roll on's to 200kph +, mine was that quick they accused me of taking off in 4th gear, it wasn't till one of them rode my bike and I his that they realised it was that quick (by 200kph from 80 my bike was around 6 to 8 bike lengths in front), not only that but on the drag it was also quicker (their 3 were very even). The guy that rode my zrx also couldn't believe how well it handled through the rough roads compared to their special suspensions and to top it off my fuel aconomy was a lot better (average 270km before reserve).
So when I did work on my Z1R it was gradual and if there was no improvement it was back to standard until everything gelled ,while others would add parts because some racer uses them I made sure they worked first, the other reason was that I couldn't afford some of the special bits.
First Permanent ride the Z1R since Dec1977 (220,000km) as of June 2015
Second permanent bike 1989 FJ1200 dyno'd 140RWH, great bike.
Third ride is now the Frankenstein 1981 GPZ1100B1, 1983 fully recon motor fitted LOVE THIS BIKE
Forth my work bike FJ1200 1989 (same type as FJ above)
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- BlackZ1R
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No, it isn't. I like 'em naked. :whistle:Bozo wrote: Hi, a quick way around this is to just get a ZX12R. When I had my ZRX1100 the standard engine was a freak, maybe because I was used the torque hard which beds those rings in nicely. Anyway....
, I couldn't afford some of the special bits.
the standard 1100....bring it :evil:
Kawasaki
Someone once told me to marry that motorcycle I was riding ......there's times I wish I hadda listened .
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- Richie7
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Bozo wrote: 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.
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I'm trying to fit a ZRX1100 carbs(Keihin CVK36) on my 76 KZ900A4. How did you clear the spacing issue? Did you have to fabricate a bracket or manifolds to fit them on yours?
1976 KZ900A4
98 CBR900RR Front End
01 GSXR1000 Swingarm + Wheel
Wiseco 1015cc Piston Kit
Dyna ignition + Accell Coils
VM28 Pumpers
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- Bozo
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I made manifolds that mount onto the head with countersunk screws, these flanges have an inner flange (same pattern as the GPZ900R) which allows the GPZ900R rubber manifolds to mount.
Since I knew a machinist it took bugger all time to make these. I also made the inner section of the flange to taper/ funnel from 34mm to match the head intake opening for a good flow.
Good luck, let me know how you go. Sorry if the picks are crappy.
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First Permanent ride the Z1R since Dec1977 (220,000km) as of June 2015
Second permanent bike 1989 FJ1200 dyno'd 140RWH, great bike.
Third ride is now the Frankenstein 1981 GPZ1100B1, 1983 fully recon motor fitted LOVE THIS BIKE
Forth my work bike FJ1200 1989 (same type as FJ above)
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- baldy110
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Bozo wrote: Richie,
I made manifolds that mount onto the head with countersunk screws, these flanges have an inner flange (same pattern as the GPZ900R) which allows the GPZ900R rubber manifolds to mount.
Since I knew a machinist it took bugger all time to make these. I also made the inner section of the flange to taper/ funnel from 34mm to match the head intake opening for a good flow.
Good luck, let me know how you go. Sorry if the picks are crappy.
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That is the stuff I like to see. Some real out of the box thinking for solving a problem. Good job on the adapters they look like they will work pretty good and they also look great
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- Richie7
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Bozo wrote: Richie,
I made manifolds that mount onto the head with countersunk screws, these flanges have an inner flange (same pattern as the GPZ900R) which allows the GPZ900R rubber manifolds to mount.
Since I knew a machinist it took bugger all time to make these. I also made the inner section of the flange to taper/ funnel from 34mm to match the head intake opening for a good flow.
Good luck, let me know how you go. Sorry if the picks are crappy.
Attachment DSC09500.JPG not found
Attachment DSC09499.JPG not found
Attachment DSC09501.JPG not found
1976 KZ900A4
98 CBR900RR Front End
01 GSXR1000 Swingarm + Wheel
Wiseco 1015cc Piston Kit
Dyna ignition + Accell Coils
VM28 Pumpers
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- Bozo
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- Ride it like u stole it
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First Permanent ride the Z1R since Dec1977 (220,000km) as of June 2015
Second permanent bike 1989 FJ1200 dyno'd 140RWH, great bike.
Third ride is now the Frankenstein 1981 GPZ1100B1, 1983 fully recon motor fitted LOVE THIS BIKE
Forth my work bike FJ1200 1989 (same type as FJ above)
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- badrhino
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1980 KZ1000 with a 1982 KZ1000J motor with 1100 pistons and heads, Vance & Hines, 29MM Smooth Bores, Work in Progress
Franken Z!
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- hill
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- 78 kz1000
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I bought a set of 03 zrx 1200 carbs off eBay & started figuring.I used the stock kz manifolds,I just took a sanding wheel & reamed them out to fit the zrx carbs.I put the manifolds on an old head I had & reamed them out to the same as the head.I beveled them in the middle to make the fuel & air to flow better.The zrx carbs are spaced the same as the kz carbs between cylinders 1,2 & 3,4.The space between 2&3 cylinders is longer on the kz.I cut the metal carb brackets & the choke slide.Then welded a piece of metal to lengthen them.I had the carbs on the old head on a milk crate.The butterfly linkage need lengthened also.I just welded a piece of metal on it to lengthen it also.The fuel tee is long enough to seal,even after spacing the carbs.I took a piece of vacuum hose & put on each side of the tee,to keep it from working to either side.It would leak fuel if it walk to far either way.Maybe it woud'nt move but I didn't take the chance.I split the hose that I put on the tee,& zip tied it on so I didn't have to remove the tee.
I tryed putting a 900 air box on it,that didn't work out.So I bought a set of k&n pods & a k&n crank case filter.I had to punched the main jets to .0565thou,that's equal to a 146 keihin.I went to a 40 pilot,which was a mistake.I should have left it a 35.I didn't touch the needle position.I was running 28mm Mikunis.I had the Mikunis tuned as good as much as I could get out of them.The zrx carbs make crazy power,Bozo is right.I could probably go one more on the mains,but I'm gonna ride it a while then check the plugs.The engine is 1075 pistons,425 lift cams,z1r valves.Its that kind of power that makes you wander if your gonna get slowed down for the turn.Sorry for no pics,but they got deleted off phone.The jetting was the hardest thing of the whole project.
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- Bozo
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I get outstanding economy with the current setup i.e. the plugs at 120kph are a dark grey colour.
The beauty of these carbs is that the vacuum slides compensate to give an even air flow so you never get a flat spot.
Let me know how it turns out once you have the bike running properly.
First Permanent ride the Z1R since Dec1977 (220,000km) as of June 2015
Second permanent bike 1989 FJ1200 dyno'd 140RWH, great bike.
Third ride is now the Frankenstein 1981 GPZ1100B1, 1983 fully recon motor fitted LOVE THIS BIKE
Forth my work bike FJ1200 1989 (same type as FJ above)
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- hill
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- 78 kz1000
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- Bozo
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- Ride it like u stole it
- Posts: 592
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First Permanent ride the Z1R since Dec1977 (220,000km) as of June 2015
Second permanent bike 1989 FJ1200 dyno'd 140RWH, great bike.
Third ride is now the Frankenstein 1981 GPZ1100B1, 1983 fully recon motor fitted LOVE THIS BIKE
Forth my work bike FJ1200 1989 (same type as FJ above)
Please Log in or Create an account to join the conversation.