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1150 carbs for a 1166 motor?

  • Thread starter Thread starter drhermanstein
  • Start date Start date
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drhermanstein

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I'm building up an 1166 for my GS1100EZ. 1150 carbs a good way to go? Should I just rejet my stock ones? Going with pod filters, cams and careful head work.

Herman
 
The 1150 was 1135cc's (I'm pretty sure) with a better head than the 1100, so it sounds like a pretty good match. But unless you can get a set of 1150 carbs real cheap I'd save my money for a set of 38mm CV flatslides from a GSXR750 or the Mikuni RS series. The 1150 carbs are 2mm larger but I don't think you'll notice enough of a difference to make it worth the trouble.
 
These are CV flatslides I'm talking about, so you still have the butterfly in the bore of the carbs but instead of the round slide that you have with the GS carbs you have a flat slide. I think it was '90-'92 that the 750 came with 38mm bores instead of the 36's on the 1100 and older 750's. Now the Canadian models may have used the 38's more extensively, so you may have a greater local selection than here in the States.
 
Cv flatslides were stock on the GSXr bikes from 1985 up.

If you are spending the money on a full build, do you bike justice and pick up a set of Rs smoothbores off ebay. They sell for around $300-400. I would think the Rs36's would be ideal. These carbs come fully tuneable, have an accellerator pump, and are simply fanastic. Combined with a Pingel dual outlet fuel valve, you have a system that will not let down the rest of the motor.

I have put a set of RS36's on my 1157cc Bandit 1200, all I can say is WOW.Well worth the investment.

Good Luck, Ed.
1983 GS750ED
2005 GSF1200SZ
1992 Duc 900SS
 
RJ said:
The 1150 was 1135cc's (I'm pretty sure) with a better head than the 1100, so it sounds like a pretty good match. But unless you can get a set of 1150 carbs real cheap I'd save my money for a set of 38mm CV flatslides from a GSXR750 or the Mikuni RS series. The 1150 carbs are 2mm larger but I don't think you'll notice enough of a difference to make it worth the trouble.
Click to expand...

The stock carbs on an 1150 are 36mm (BS36SS). There is a set on ebay right now... i bid on them but didn't make his reserve, so I won't be bidding anymore. They are still going cheap. I was thinking of putting them on my soon to be modified 1000, but think I will hold out for some VM29's.

If you are after good streetability for your bike, I would think that the 1150 carbs would work well. You would probably want to put a stage 3 dynojet kit on them.
 
38's are too much carb for that bike...Get a set of 36's from a GSXR up until 1991 I think. The RS's are better though but the GSXR carbs work great.
 
1150 carbs work perfectly on an 1166'd 1100, I have a set on my Katana, did not need to re-jet.

Dink
 
They behave like stock carbs, but open the topend up a little.
They are the stock carbs, just 2mm bigger.

Dink
 
A little off topic but does anyone on here have a set of these GSX-R Carbs on an 1150? Are there any hassles with the cables, air cleaners, jetting, etc? I keep hearing about this modification but would like to heat from someone who has done it already. TH
 
Todd Horton said:
A little off topic but does anyone on here have a set of these GSX-R Carbs on an 1150? Are there any hassles with the cables, air cleaners, jetting, etc? I keep hearing about this modification but would like to heat from someone who has done it already. TH
Click to expand...

I ran a set on mine for a while. My street bike is an 1100 that I put a 1166 kit in and an 1150 head on which I just cleaned up the ports. Jetting is easy ( I think about a 117 main ) and I forget the pilot size but I have a couple of more sets that I have already set up so I can drop the bowl and take a look if you like. The cable I made a little spacer for. The air cleaner is a K&N. The bike ran a whole lot better than the 34's. A little rich on the pilot but not much.
 
So what year model GSX-R carbs do I need to look for? Is there any clearance problems with the fuel tank, frame, side covers, etc? TH
 
Todd Horton said:
So what year model GSX-R carbs do I need to look for? Is there any clearance problems with the fuel tank, frame, side covers, etc? TH
Click to expand...

GSXR 750/1100 up to 91
No problems with clearance
K&N Filters (RU-2922) Pricy but nice (-:

If you decide on going with the GSXR carbs let me know.
 
Last edited:
So what is the bore size of these carbs? I have a set of 34 mm flat slides (I think that's what they are) off of a GSX-R ???? I was thinking that they should be 38mm carbs. TH
 
1986 thru 1988 1052cc GSXR1100's used flatslide 34mm carbs. I had a set on my '83 GS750 for many years. 1989 GSXR1100 and up went much larger, in the 38-40mm range.

I believe the 88-89 Slingshot 750 motors used 36's though.

1997 and up Bandit 1200's also use 36mm Mikuni's, the 2001 and newer will have a TPS senser on the right side but this can be bypassed.

Good Luck, Ed.
1983 GS750ED
2005 GSF1200SZ
1992 Duc 900SS
 
oldschoolGS said:
1986 thru 1988 1052cc GSXR1100's used flatslide 34mm carbs. I had a set on my '83 GS750 for many years. 1989 GSXR1100 and up went much larger, in the 38-40mm range.

I believe the 88-89 Slingshot 750 motors used 36's though.

1997 and up Bandit 1200's also use 36mm Mikuni's, the 2001 and newer will have a TPS senser on the right side but this can be bypassed.

Good Luck, Ed.
1983 GS750ED
2005 GSF1200SZ
1992 Duc 900SS
Click to expand...
Spacing is not right on the newer carbs to fit the older GS's on th 97 and up. I have 1 set of 36's that you say are slingshot and 1 set of 38's that you say are from an 89 and up 1100. I just know that the 36's work nice on the ole' 1100.
 
The RS36's on my Bandit list for any air/oil GSXR, from 1988 to 1992. I have the RS36-D3-K carbs (center pull).

http://www.sudco.com/mikuni6.html

If they work on the Bandit, the same carbs should work on any air/oil GSXR and GS1100.

http://www.pro-flo.com/proflo_mikuni_RS_carb_kits.htm

Spacing for all the air/oil GSXR bikes is listed as 77-93-77. This is identical to the 1997-2000 Bandit 1200. There is a small change on the 2001 and newer bikes (with TPS and less than 5mm). It is so small that you should be able to offset the rack slightly to compensate.

I did use 1997-2000 Bandit 1200 intake boots on my 05 Bandit to get the allignment absolutely perfect and to avoid upsetting the RS rack.

Good Luck, Ed.
 
No, those are off a liquid cooled bike. Only the air/oil cooled carbs will work.

1992 was the last year the GSXR was air/oil cooled. The Bandit 1200 is the only current Suzuki (in the US) using the air/oil cooled GSXR engine platform.
 
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