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Old 06-08-2007, 08:56 AM   #1
kath
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gsxr 1100 89 model carbs

Hi

I have a gsxr 1100 89 which i bought off auction . The bike is in great condition but apparently there is a problem with the carbs . Currently the bike has 40mm carbs fitted . I am looking for 2nd hand carbs and want to know if I have to get 1100 carbs or will a 750 or a later model 1100 still fit?

Thanks
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Old 06-08-2007, 06:48 PM   #2
gotgixers
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Re: gsxr 1100 89 model carbs

Almost any oil cooled carbs will fit. A set of 36 or 38mm cv's will go right on. Why do you want to remove the 40mm cv's??? And if you do end up removing them, will you sell them to me??? I would just keep the 40's and jet them with a factory pro kit myself. But 36's will work,and have a better low end and gas mileage, but won't pull as hard on the top end.
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Old 06-08-2007, 07:21 PM   #3
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Re: gsxr 1100 89 model carbs

Your bike came stock with 36mm . 89-92 1100 carbs are 36mm , 90-92 750 are 38mm. Like gotgixxer said , factory pro makes jet kits for all these carbs and for the different combos, such as running the 38mm 750 carbs on your 1100 .
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Old 06-09-2007, 12:39 AM   #4
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Re: gsxr 1100 89 model carbs

Well moon,a few years of the 1127's(89-92) out of the U S came with 40mm's on them stock. (We got stuck with the tiny 36's)I have a set off a bike from the uk.They work sweet. But you give up bottom end when you use them on a street bike. My 36's work great on my 1157 up 'till about 9000 rpm, then they start to drop off.
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Old 06-09-2007, 03:17 AM   #5
kath
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Re: gsxr 1100 89 model carbs

Thanks For the replies - I have been told by some guy that the carbs are stuffed . I dont really believe him because I checked them myself but I dont know much about the needles etc. The bike runs but then starts to smoke after a while and then has a problem idling . New plugs get black very quickly. If i replace the plugs it runs well again for a while. The idle screw on the carbs is broken cause it doesnt move at all. They never came standard with the bike . I think I must get the bike back and have a proper look - maybe post some pics

Thanks
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Old 06-09-2007, 06:08 AM   #6
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Re: gsxr 1100 89 model carbs

The non US GSXR1100 of 1991 and 1992 cames with 40mm CV's stock. 1989 and 1990 GSXR1100 came with 36mm carburetors regardless of there destination. The 40mm CV is a hard carburetor to get o work because of the huge throat diameter and the intake boot which came with them actually tapered down to 36mm as the cylinder head. So it was simply away for Suzuki to try and get its' flag ship sportbike to make power with Kawasaki's then new ZX11C. The 1991 and 1992 GSXR1100 cylinder head ports are also raced as compared to the 1989 and 1990. But with a side draft head, bigger carburetors just robbed the mid-range punch of the 1127 while not making a big deal up top. Again, the 36mm carburetor flows 106cfm, the GSXR1127 head only flowed 95cfm and that was after a .350" lift was installed. It was never the 36mm carburetor keeping the big 1100 from posting big top end horsepower numbers.............it was the side draft head. Airtech's ram airbox is expensive but I bet it's best horsepower for your money after adding a good exhaust.
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Old 06-09-2007, 09:12 AM   #7
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Re: gsxr 1100 89 model carbs

go with the 38mm carbs. it is between the 36 and 40 . you should be able to get the best of both worlds. good bottom end and top end.
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Old 06-09-2007, 11:46 PM   #8
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Re: gsxr 1100 89 model carbs

Thanks Rajay, i knew it was somrthing like that.That is some useful info..
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