Carb OEM specs as per factory manuals

[Juob]

Any specs on '81 GS750E?

From my Suzuki GS750 service manual and its model specific supplements:

GS 750
1980- 81
LT/LX/EX Model

Carb ???????. BS32SS (4 separate carbs)
bore size ?????. 32mm (1.26)
id no ???????. 45400
idle r/min???.... 1050 +/- 100 r/min
fuel level ?????. 5mm +/- 0.5 (0.20 +/- 0.02)
float height ???? 22.4mm +/- 1.0 (0.88 +/- 0.04)
Main jet??????. 112.5
Main Air jet????? 1.7
jet needle?????.. 5C28
Needle Jet?????? Y-4
Pilot Jet??..????. 42.5
By-pass?.?????? 0.8, 0.8, 0.8
Pilot Outlet?????? .7
Valve seat?????? 2.0
Starter jet?????? 50
Pilot Screw............. Preset
throttle cable play ?. .5-1.0 (0.02-0.04)



GS 750
1982
EZ/TZ Model

Carb ???????. BS32SS (4 separate carbs)
bore size ?????. 32mm (1.26)
id no ???????. *45420
idle r/min???.... 1050 +/- 100 r/min
fuel level ?????. 5mm +/- 0.5 (0.20 +/- 0.02)
float height ???? 22.4mm +/- 1.0 (0.88 +/- 0.04)
Main jet??????. 112.5
Main Air jet????? 1.7
jet needle?????.. 5C28
Needle Jet?????? Y-4
Throttle Valve… *135
Pilot Jet??..????. 42.5
By-pass?.?????? 0.8, 0.8, 0.8
Pilot Outlet?????? 0.7
Valve seat?????? 2.0
Starter jet?????? 50
Pilot Screw............. Preset
Pilot air jet……….. 170
throttle cable play ?. 0.5-1.0 (0.02-0.04)
Choke cable play… *0.5-1.0 (0.02-0.04)

*Indicates new Z model spec

[txironhead]

Just what I needed. Thanks!

[first timer]

this one frank!

[REDDY]

Warning!!

I am currently trying to get an 80' model 550 to run right. I have everything according to the manual. I have my doubts about main jet size according to the book. I tried 92.5's and I can't believe these bikes will run with that size mains. Low end is not bad but from 7k to redline there is nothing ! If anyone has experience with 550's and is sure what size works I would sure like to hear about it. The jets I have are Dangerously LEAN!!

[Bud]

Missed the sticky somehow.

Looking for the info on my 86 550L. Pilot and needle jets, if there is 2 different needle jets in the same carb, what one is what? strange carbs, could have some strange settings. Float height. Needle? Needle setting?

[veda_sticks]

Is the pilot screw refering the the screw on the bottom of the carb?? I have been trying to figure out wot this screw does, haynes does not mention it and my other manual on cd-rom just says, do not touch. If this is the pilot air screw, then great cause i doubt that it is set right and may be why my bike just wont run right.

so when i turn this screw out is it allowing more fuel or more air?? Im guessing more fuel as it is a mixture screw.

[SPOT1000KAT]

CV Tuning Link

Hi Folks,

found this link on fine tuning CV's which looks like it might come in handy for some.

http://www.factorypro.com/tech_tuning_procedures/tuning_carbtune,CV,high_rpm_engines.html

Cheers,

Spot

[blackwolf]

Would this be the same for a 1980 gs850l?

[MelodicMetalGod]

Any update?

This thread has a lot of great info. Has anyone completed compiling the info into a more organized presentation?

PS: I'll add 1985 GS550E/ES specs for Mikuni BSW30SS twin two-barrel carbs soon.

[Jackw]

83 GS550E
Mikuni
BSW30SS
30 mm

It should have 43410 stamped on the side

Fuel level: 6.5 +/- 0.5mm (.26 +/-.02in)
float height: 20.5 +/- 1.0mm (0.81 +/- .04in)
Main jet:
cylinders 1 and 4: 95
cylinders 2 and 3: 102.5
main air jet: 1.0
Jet Needle: 5C64
Clip position: 1 groove from top
needle jet: P-2
Throttle Valve: 120
Pilot Jet: 35
Bypass: 0.8,0.7,0.8,0.8
Pilot outlet: 0.7
Float valve seat: 2.5
starter jet: 55
Pilot screw: Preset

Quick one, 2 of my clips are on the 3rd groove from the bottom and the otehr 2 clips are 2 from the bottom? Is this the proper setting? This post siad 1 groove from the top? the carbs have different size main jets so are the clip positions different to match the different jet sizes?

Thanks

[MelodicMetalGod]

For 83 GS550E & ES. As promised...enjoy!

[samson66048]

I have more of a question

I have a 1980 GS1100. Love the bike, however I do have one problem. When I first start bike and ride, it runs fantastic, but after it gets warm, it tends to die if I come to a stop. So, I nurse the throttle when at a stop, and it is very sluggish, feels like it is loading up. Any ideas?? I just finish tearing down the carbs and cleaned them in hopes it would correct it. No luck. HELP

[BassCliff]

1980 GS850GT carb specs

Do you have these already?

GS850GT carb specs



Thank you for your indulgence,

BassCliff

[Rustybux]

carb oem spec as per factory manuels

Of course, I dont know what all the numbers mean for float level such as float height 24.+/-1.0 (0.95 +/-0.04). Needs to have more information as they do on cars like "float height 3/8 inch"

[BassCliff]

The legend in the upper right hand corner says:

Unit: mm (in)

I would assume that means 22.4mm +/- 1.0mm or 0.88 inches +/- 0.04 inches for the float height. Doing the math, that's roughly 7/8" +/- 1/32".

I was told there would be no math today. :-D

Thank you for your indulgence,

BassCliff