Carb OEM specs as per factory manuals

[first timer]

I don't mind you guys linking pictures but am a little concerned when the link goes down say a year from now then the info is lost again, so please type in the info so we have it forever. Also you guys are doing a great job restraining your selfs from asking to many technical questions here and clutering it up, I can't belive how well this has grown. One more thing then I'll step off my soap box, don't forget to go through all the posts or try searching in this tread for a specific model first then ask if you can't find it.

 

[first timer]

VM 29's (Smooth Bore) - 1978 GS1000 1979 stock motor, K&N RC-2450 filter, Yoshimura 4 into 1 header and can

This is what I am currently running (it maybe differant for others)

117.5 mains (what came with bike)
.9 air jet didn't pull it to check
#20 pilot jet (changed from #25, to rich for me with #25's)
5dl31-3 needle
0.6 needle jet
1.5 throttle valve (cut away)
1/2 turn out on the mix screw

Looking at Sudco's spec sheet these carbs i have (A7) look like they were set up for a kz650, kz900 or a kz1000

sudco recomends for the GS750/GS1000 (A12)
#115 mains
.9 air jet
#25 pilot jet
5dl31-3 needle
0.6 needle jet
2.0 throttle valve (cut away)

sudco recomends for the kz650, kz900 or a kz1000 (A7)
117.5 mains
.9 air jet didn't pull it to check
#25 pilot jet
5dl31-3 needle
0.6 needle jet
1.5 throttle valve (cut away)

sudco recomends for the cb750 thru '78 (A2)
115 mains
.9 air jet didn't pull it to check
#17.5 pilot jet
5dl31-3 needle
0.6 needle jet
1.5 throttle valve (cut away)

About my carbs the 117.5 mains came with them, the carbs were mounted on the bike and at some point before me the bike liked the setup. i heared stories of the bike pulling wheelies down the street back in the day from a shop owner who knew the bike. I cleaned up every thing, carbs were nasty and tried running it with the #25 pilot jets but was to rich and not happy, what i found out was the 1.5 throttle valves cause a richer condition then the 2.0 which is what the bike is suppost to have so by dropping the pilot jet down one it should step everything down one notch. Which it did and the bike has been running good since, but keep in mind i think my motor is starting to get tierd so a fresh motor might like the #25 pilot with a 1.5 throttle valve.

make sure you have everything cleaned out real good, there is a little hole under the throttel valve as well as a paper gasket under it too. Make sure the hole is clean and the the gasket is replaced or in good shape. Also check your needles my orginal ones were less then desireable. Also make sure you have new o-rings, you can get almost any size you can think of from mc-mastercarr.

download this pic and save it, it is a real good referance point
http://www.sudco.com/Diagrams323728/expvm29.gif

-Ryan

 

[uscwks]

MIkuni 34MM

MIkuni 34MM

Does anyone have the specs on the 82 1100E? I could sure use them. Would it be about the same as the 1100? Mainly need the float level.

 

[BassCliff]

Good point

Good point

I don't mind you guys linking pictures but am a little concerned when the link goes down say a year from now then the info is lost ...

Mr. uscwks,

That is a legitimate concern. When I find information in that format that I want to keep, I will right-click and "save image as" and keep my own copy on my own hard drive. But I will endeavor to post the text in the future.

Thank you for your indulgence,

BassCliff

 

[johnnay]

Ok, I read this thread and for some strange reason felt compelled to put all this info into an excel spreadsheet - like I don't get enough of those at work...:shock:

anyways, I have it completed with most of the info presented in this thread - there were a couple of posts that weren't in the same format or that were missing too much info, so I didn't include them.

It appears the forum won't let me upload it, so you'll have to email me if you want it (or if you want to tell me how/where to upload it). I'm going to bed now.. 8-[

 

[rrichard]

Hi Guys

I have been trying to buy a part for my GS1000En (1979), I though it was a needle valve or jet but when I ordered it, what arrived was not what I was looking for, I have searched the blown up drawings for this and still can not find it. The Carb is a VM26ss, it screws up into the carb body from underneath the bowl (the bowl does not need to be removed to get to it), it is brass and has a needle like appearance on a screw body . Any help much apreciated

Cheers

Richard
Dubai

 

[DonL]

GS1000G BS34SS VM34 specs
Here are the specs for stock jetting.
Specs in mm.
Carb Type- Mikuni BS34SS
Bore Size-34 mm
ID# - 49160
Idle r/min - 1050 +/- 100 r/min
Fuel Level - 5.0 +/- 0.5
Float Height - 22.4 +/- 1.0
Main Jet - #115
Main Air Jet - 1.7
Jet Needle - 5D57-3rd
Needle Jet - X-8
Pilot Jet - #40
Bypass - 0.9, 0.8, 0.8
Pilot Outlet - 0.7
Valve Seat - 2.0
Starter Jet - #45
Pilot Screw -Pre-Set (I started with 1-3/4 going to 2 or 3 out)
Pilot air jet - #160
Throttle Cable Play - 0.5-1.0
Choke Cable Play - 0.5-1.0

 

[haga41cat]

Help Me!

Help Me!

Hey guys does anyone have any carb settings for a 1984-85 GSX750ES.

Infact any info on that bike would be great i can't find anything cheers everyone!

 

[Suzuki_Don]

Hi Guys

Richard it looks like the pilot fuel screw to me.

Cheers

Don

 

[Zuriick]

I keep seeing questions about clip settings. I just rebuilt my carbs and the kit came with clips, but I never once saw a place where they should go. I have a 77 gs750. Can someone post a picture or be specific where this goes?

 

[davidjohn]

ref pic of back gs550

ref pic of back gs550

Hi

Was looking at the picture of the black gs550 and seen it was running sports filters on the carbs........I would like to do that on my bike also a gs550.......question ,standard main jet size is 80, what should it be with the sport filters fitted....also what make are the filters....

davidjohn

 

[first timer]

read this this entire thread http://www.thegsresources.com/_forum/showthread.php?t=71640&highlight=550

and please start a new topic, this is for oem carb specs.

 

[hcritz]

Hey Guys...
I got the factory technical manual update for my 85 1150ES with the bike...I think I remeber seeing all the specs for carbs etc. They may be the same as the 84 which is already posted....I'll check and see...if not I can post them here. Lots of info in that publication...it has routing for wiring and hoses etc as well.

 

[Matchless]

Ok, I read this thread and for some strange reason felt compelled to put all this info into an excel spreadsheet - like I don't get enough of those at work...:shock:

anyways, I have it completed with most of the info presented in this thread - there were a couple of posts that weren't in the same format or that were missing too much info, so I didn't include them.

It appears the forum won't let me upload it, so you'll have to email me if you want it (or if you want to tell me how/where to upload it). I'm going to bed now.. 8-[

johnnay,
Your spreadsheet is a great idea and puts all the information nicely together. Could you possibly upload it to Mediafire and post the link here, then all would be able to use. Just add a version or update date or similar if possible. Sorry bad habit of mine!
Thanks for the copy a while back, I think this should not get lost to future generations of GS fans.
Keep well and thanks.

 

[walt]

Does anyone have the specs on the 82 1100E? I could sure use them. Would it be about the same as the 1100? Mainly need the float level.

the float level is 22.4 mm +/- 1.0 mm
the service level is 5 mm +/- 0.5 mm

 

[Silvermachine81]

VM Identifying

VM Identifying

I've got a weird set of VM's stamp with the I.D. number x48810.

Can anyone I.D them?

 

[BassCliff]

1980 GS850G carb specs, finally!

1980 GS850G carb specs, finally!

I finally got around to typing up the specs for the 1980 GS850G carburetors.

1980 GS850GT Carburetor Specs
Unit of Measurement = mm(in.)

Carburetor type = Mikuni BS32SS
Bore Size = 32 (1.26)
I.D. No. = 45110
Idle rpm = 1050 +/- 100rpm
Fuel Level = 5.0 +/- 0.5 (0.20 +/- 0.02)
Float Height = 22.4 +/- 1.0 (0.88 +/- 0.04)
Main Jet = #115
Main Air Jet = 1.7
Jet Needle = 5D50
Needle Jet = X-5
Pilot Jet = #40
Bypass = 1.0, 0.8, 0.8
Pilot Outlet = 0.7
Valve Seat = 2.0
Starter Jet = #32.5
Pilot Screw = Preset
Throttle cable play = 0.5-1.0 (0.02-0.04)

Thank you for your indulgence,

BassCliff

 

[jabberjoe87]

jet size

jet size

does anybody know the main jet size of a 77 gs 750, and any idea what size or sizes to try if i'm using pod filters.

 

[basic]

Looking at the December 76 FSM i have -
Carburetor Jetting Specifications:

Type: VM26SS
Main Jet: 100
Air Jet: 0.7
Needle Jet: 0-6
Jet Needle: 5F21-3
Pilot Jet: 15
Pilot Air Jet: 1.6
Cutaway: 1.5
Air Screw: 1 Turn back
Float Hieght: 25-27mm

 

[Colin Green]

Ryan, here are the numbers for the 82/83 GS1100

GS 1100
1982-83
G, GL, GK Model

Carb ???????. Mikuni BS34SS (4 separate carbs)
bore size ?????. 34mm (1.34)
id no ???????. 49400
idle r/min???.... 1050 +/- 100 r/min
fuel level ?????. 5.0mm +/- 0.5 (0.20 +/- 0.02)
float height ???? 22.4mm +/- 1.0 (0.88 +/- 0.04)
Main jet??????. #115
Main Air jet????? 1.7
jet needle?????.. 5D58
Needle Jet?????? X - 3
Pilot Jet??..????. #40
By-pass?.?????? 0.9, 0.8, 0.8 (0.04, 0.03, 0.03)
Pilot Outlet?????? 0.7
Valve seat?????? 2.0
Starter jet?????? #50
Pilot Screw............. PRE-SET
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)

Hi,

I'm trying to set my idle mix on my 85 GS110G but am having problems (could just be me as I'm not experienced at "highest rev" tuning) but thought I'd check the jet sizes from the carb that came out of my bike (replaced with striped, cleaned & re-O ringed spare carb with the same size jets) Pics attached.

http://s251.photobucket.com/albums/gg305/flyingcrocodile46/?action=view&current=IMG_0008-1.jpg

My main jet appears stock at 115 but my pilot air jet appears to be 150 rather than 170. What difference would this make?

btw, my bike has standard pipes and air cleaner and the bike that the spare carbs came from had a 4 to 1 and standard air cleaner.

TIA

Colin