Carb Jetting List

[huntb]

Huh weird... I was using the dark theme (Avenger) for the forum and I guess the default font is pale like that. I think it happened because I copied and pasted the OPs post and that's the font color it was with the Avenger theme. Maybe I can fix it...

Edit: Fixed it

[JJ]

No biggie.. I just wondered.

[78550GS]

1978 GS550E
Stock engine, 81gs750 signal generator coils and ignitor
Stock exhaust
emgo pods
VM22 Mikunis needles adjusted one notch up
stock jets except mains, bumped to 105(still tuning) fuel screws at 1 turn, air screws at 1.25 turns (also still tuning)
NE Ohio elevation? will check and edit
Just started tuning yesterday, pulls damn hard above 2k, VERY slight stumble taking off, feels like it runs out of legs above 7500

Hope this helps someone else.

After playing a bit with it, I found a small leak in the exhaust. And I need to adjust the valves. Will update more when those are done and I dial it in.

[Rob S.]

no secrets with a st.3 jet kit.
a little smoke blowing IMO.
not by you Rob but by the person acting like this info is top secret.

This winter I'll be throwing him another grand or two of work (valve check, tune up, SS brake lines, rear suspension, possibly cartridge emulators, elec. repairs), so I'll put the request for all the carb details in the work order.

Even if he "lost" the details, if he removes the carbs for cleaning (and to loosen up the choke so I can work it from the handle bar), won't all the jettings and settings be there for him to see and write down?

Although I suppose it's possible the carbs may need to be re-jetted once they've been cleaned. Is that likely?

[azr]

This thread isn't intended to be here for 'banter', if everyone could just focus on posting their bike with the carb settings it would be best.

[Nessism]

This thread isn't intended to be here for 'banter', if everyone could just focus on posting their bike with the carb settings it would be best.

Bumping this thread back up for more info and AGREE with Rob on this!

[winmag4582001]

1980 GS1000E

155/152.5 main jets
Needles are up 1.2mm
Idle fuel screws out 2 1/2 turns
K&N pods
V&H 4into1
Float height factory
Valves are set at the high end of tolerance
I'm in Denver CO

So far there is no issue at all with idle or 4,500-redline, mid range is being sluggish
I was told to try and block the airport on the intake side of the carb that is on the right side (opposite of the air meter jet), I used some cork and did that and there was a very noticeable positive difference.

So my plan to take care of the mid range is: raise the needles another .2mm+ and block off the secondary air ports with something more permanent than cork.

[wymple]

1981 GS850G
4" foam pods
stock exhaust, opened up some by drilling (6) 5/16 holes around the exit center
stock idle jetting
air jets at 3-1/2 turns
mains 127.5
needles raised with fine washers until eliminated midrange bog
starts & runs like a champ great off idle jump to midrange
slightly bothered upper end acceleration depending where my legs are, midsets or highway pegs, due to turbulence around outer pods.
planning on making a shield to kill the turbulence factor on each side. Runs really well anyway.

[winmag4582001]

1980 GS1000E

155(center cylinders)/152.5(outer cylinders) main jets
Needles are up 1.2mm
Idle fuel screws out 2 1/2 turns
K&N pods
V&H 4into1
Float height factory
Valves are set at the high end of tolerance
I'm in Denver CO

So far there is no issue at all with idle or 4,500-redline, mid range is being sluggish
I was told to try and block the airport on the intake side of the carb that is on the right side (opposite of the air meter jet), I used some cork and did that and there was a very noticeable positive difference.

So my plan to take care of the mid range is: raise the needles another .2mm+ and block off the secondary air ports with something more permanent than cork.

****FINALLY!!!!!****

155/152.5 main jets
Needles are up 1.5mm (two small washers on top of needle) ***As of 9/13/19 I'm up 2mm on the needle, 1 shim washer on top of the e-clip, pulls hard***
Idle fuel screws out 2 1/2 turns +/-
K&N pods
V&H 4into1
Float height factory
Valves are set at the high end of tolerance
Used 4 DynoJet 4mm air jet plug (right side air port opposite of the jet on air intake side) Part #DC0301 $2 each

Installing the Dynojet plugs made a huge difference

[Tom R]

Model of your bike: 1980 Gs1100L
Engine and any mods done: ‘83 cams set 105/107

Type of exhaust: V&H 4-1 supersport
Type of airbox/pods: K&N pods
Type of carbs: gs1150 BS36
Carb settings: gs1100 factory pro needles 4th clip from the top; 152.5 main jets, 47.5 pilot jets, 170 air jets (125 stock on the 1150 - this cured an off idle transition stumble)
Fuel level: 5mm from carb body (3mm stock on 1150)
Elevation: 750’
How the bike runs with this setup: Pulls hard to redline, wheel starts to lift about 6.5k. Feels a little rough at low speed cruise between 3k and 4K - various throttle positions.... so maybe pipe.