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Best size Carbs?

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nw66
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#16 PostAuthor: nw66 » Tue Dec 16, 2014 4:24 pm

I have RS 40's on my gs/gsxr1216 motor :lol:

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Ducati 1199R Race
Ducati 1198R Race
Suzuki GS/GSXR1216 Turbo Drag
Suzuki Katana 1170 Homa sz
Yamaha R7/R1 motor
Kawasaki ZXR750R M1
KTM SXF250



The older it gets the faster it was :-))
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snotie1965
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#17 PostAuthor: snotie1965 » Tue Dec 16, 2014 5:02 pm

nw66 wrote:I have rs 36's on my Katana 1170 with head work cams they work really well loads of grunt go to big it pushes it to far up! tuned by Chris at Grumpy 1260:)

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That Katana looks Lush ! what sort of torque and bhp does it have ?
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nw66
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#18 PostAuthor: nw66 » Tue Dec 16, 2014 5:26 pm

Haven't had it on the dyno yet motor is brand new Chris who built it reckons 125/130 bhp Bought it from Mike p off here in the summer its a 1000sz still have the original motor which had some head work done and was quick so looking forward to the spring to test the new motor :D
Ducati 1199R Race

Ducati 1198R Race

Suzuki GS/GSXR1216 Turbo Drag

Suzuki Katana 1170 Homa sz

Yamaha R7/R1 motor

Kawasaki ZXR750R M1

KTM SXF250







The older it gets the faster it was :-))
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510racer
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#19 PostAuthor: 510racer » Tue Dec 16, 2014 10:00 pm

nw66 wrote:Haven't had it on the dyno yet motor is brand new Chris who built it reckons 125/130 bhp Bought it from Mike p off here in the summer its a 1000sz still have the original motor which had some head work done and was quick so looking forward to the spring to test the new motor :D


Shit you have quite nice quiver of bikes there! The Kat looks awesome.

All these big bore bikes and large carbs are making me feel inadequate with my standard 900 and 29's...
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510racer
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#20 PostAuthor: 510racer » Tue Dec 16, 2014 10:04 pm

I had kind of settled on the CR29's before i started this post, but just wanted to check before i made the purchase.

I was also going to purchase a Yoshi MJN kit for them.
Is this a worthwhile upgrade for the CR's??
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Is Vic There
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#21 PostAuthor: Is Vic There » Wed Dec 17, 2014 5:28 am

So are the carbs from a GSXR usually called flat slides?
I have a set of these that are bored out to 31mm, originally from a GSXR750 and then fitted and re-jetted to a Z1000.
Norton 850 Command, Harris Mag 2, Harris Mag 5, Triumph Steve McQueen, Suzuki RGV250 Barry Sheene, RG250 Walter Wolf, RD125LC, Lambretta Li150, Vespa 50N.
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#22 PostAuthor: garyd » Wed Dec 17, 2014 9:26 am

Is Vic There wrote:So are the carbs from a GSXR usually called flat slides?
I have a set of these that are bored out to 31mm, originally from a GSXR750 and then fitted and re-jetted to a Z1000.


They got the name from the fact that the carbs have 'flat sides'...instead of the normal cylindrical shape.

Don't be fooled by the CV versions which often get palmed off as 'slabbies'.
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#23 PostAuthor: Is Vic There » Wed Dec 17, 2014 9:39 am

Hi Gary,

They are defiantly from a GSXR, have used J carb rubbers on the Z1000 head, just need decent clamps. Look good, not as good as CR but they'll do for the time being!
Norton 850 Command, Harris Mag 2, Harris Mag 5, Triumph Steve McQueen, Suzuki RGV250 Barry Sheene, RG250 Walter Wolf, RD125LC, Lambretta Li150, Vespa 50N.
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#24 PostAuthor: Big Fluff » Wed Dec 17, 2014 1:39 pm

I ran a a set of Keihin CR35's on my old Moto-Martin, the motor ran 1135cc with a Phil Manzano head fitted with o/s valves and .425 Kent cams.
It was slightly over fueled but the acceleration was phenomenal.
Kawasaki Z1-R TC Turbo, Kawasak GPz750 Turbo, Kawasaki KZ650B3, Kawasaki ZRX1100R, H**** VF500F2F, Norton Commando 961SP, Suzuki VS800
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nw66
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#25 PostAuthor: nw66 » Wed Dec 17, 2014 2:06 pm

The Rs's have an accelerator pump the Cr's don't both work well though and the Cr's look cool :)
Ducati 1199R Race

Ducati 1198R Race

Suzuki GS/GSXR1216 Turbo Drag

Suzuki Katana 1170 Homa sz

Yamaha R7/R1 motor

Kawasaki ZXR750R M1

KTM SXF250







The older it gets the faster it was :-))
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buzzard
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carb size

#26 PostAuthor: buzzard » Wed Dec 17, 2014 3:38 pm

Standard Z900 lump, wouldn't go larger than 29mm, anything else is a waste of money. Didn't one of the Z1R models have 28mm carbs with accelerator pumps?? Buzzard.
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nick pearce
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Which size CR's

#27 PostAuthor: nick pearce » Wed Dec 24, 2014 11:20 pm

I've found 33mm CRS worked very well for the last 20 years on my gpz1170 with kent cams , gas flowed head, bigger valves etc, but now tried 37mm CR's which give abit more top end and midrange hasn't really changed. Experimenting with my old 33mm CR's on my Z1000J at the moment- pug colour about right but flat spot just before it goes on cam. Could go back to CV's on J but don't want to lose any power. Good luck with it mate.
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Carb sizes.

#28 PostAuthor: nick pearce » Wed Dec 24, 2014 11:26 pm

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Here we go the gpz originally with 33's.
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More carbs.

#29 PostAuthor: nick pearce » Wed Dec 24, 2014 11:30 pm

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There's another pic. Cheers.
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ruffle
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Re: Which size CR's

#30 PostAuthor: ruffle » Thu Dec 25, 2014 1:26 am

nick pearce wrote: now tried 37mm CR's which give abit more top end and midrange hasn't really changed.


What inlet rubbers do you use to fit CR37's to a GPz head?
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