Carb swap?

[duff daddy]

ok mr technical, i think i was pretty damn close

[The CyberPoet]

31mm = roughly 1.22 inches (1 & 7/32nds) -- just a hair under 1-1/4
32mm = roughly 1.26 inches (1 & 17/64ths) -- just a hair over 1-1/4
33mm = roughly 1.3 inches (1 & 19/64ths) -- just a hair under 1-5/16

Cheers
=-= The CyberPoet

[duff daddy]

just need a tape with millimeters now lol
thx

13 mm is a half inch so 25 = 1 inch about and 34 would be about inch and a quarter

[The CyberPoet]

just not enough of a size difference then?

1mm size difference isn't really enough to make a major difference (1mm smaller in the 98+ produces a little bit better fueling at lower RPM's because of higher velocities through the carbs, but also acts as a constriction point to reduce how much air can flow through at high RPM's). The biggest difference is the addition of the TPS (Throttle Position Sensor) which causes the CDI to use 2 different spark maps, depending on the carb butterfly position and gear -- but to get that, you'd have to swap carbs, CDI's and related wiring. No worth the tiny boost in 1 & 2nd gear, IMHO.

Cheers
=-= The CyberPoet

[tylerc]

just not enough of a size difference then?

[The CyberPoet]

anyone every swap up to the 98+ for better performance?

It won't give you any better performance unless your carbs are in bad shape.

Cheers
=-= The CyberPoet

[tylerc]

anyone every swap up to the 98+ for better performance?

[Gsxxx600]

just need a tape with millimeters now lol
thx

[The CyberPoet]

Simple way to tell definitively:
measure the opening on the engine side of the carbs -- the measurement in millimeters is the same as the two digits of the carb identifier (i.e. - a BR33ST has a 33mm opening).

For the Kat 600s, the OEM carbs are:
88 & 89:
Mikuni BST31SS (31 mm, 4 each)
90 - 97:
BST33SS (33 mm, 4 each)
98 - 05:
Mikuni BSR32
(32 mm, 4 each)

Cheers
=-= The CyberPoet

[katrider]

I think a Suzuki dealer with good parts counter help can find those numbers for ya...that's where I would start.

[Gsxxx600]

While taking apart the carbs to clean, I kept wondering why my Haynes manual is giving me directions to take apart items that I dont even see...Haynes states my 94 600 has BST33SS carbs.

However, I began looking at the diagrams of the 31 and 34SS carbs, and it turns out, mine looks exactly like those...not the 33SS.

I have a part number off the side of the carb...44C30, which looks exactly like a gsx1100f carb setup.

Ronayers states the carbs that should be in my bike, are 44C20.

Can anyone help me figure out which bike these were actually pulled from? It would make disassembly and cleaning much clearer.
Thanks