Gs1150 carbs on gs1000

[Monique]

Greetings. Has anyone ever worked gs1150 carbs on a gs1000? Purchased a Gs1000 recently with that setup and has been a nightmare to get it to run properly. Previous owner said it use to run fine.Starts and idles without any issue, no choke required, but is not smooth at low speeds, and breaks up really bad at higher speeds.

[Big T]

What year and model GS 1000 are you asking about?

Have you cleaned the carbs?

[Monique]

hmm. lets see. think of Frankenstein. 1979 GS750E frame, With a Gs1000 engine, Got it like that, also with 1150 carbs. i think 1100es swing arm and front forks, lol

[Monique]

[Nessism]

The carbs are fine. The issue you are facing is because of the pods. They mess up the jetting.

[steve murdoch]

Also looks like the baffle is missing from the muffler?
That can also make the bike run lean and affect the jetting required.

[rphillips]

Previous owner said ???... Just a thought, be careful betting on what the previous owners say... Also GS1150 carbs worked great on my GS1100E with stock air box

[Monique]

Also looks like the baffle is missing from the muffler?
That can also make the bike run lean and affect the jetting required.

Yes the baffle is out, but in or out the bike doesn't work well. Black sooty plugs and exhaust. Sometimes a little black smoke. I think that means rich, instead of lean mixture?? Pods on or off makes no difference either. Have 45 idle, 120 main. Have adjusted that fuel screw up, down, changed needle clip positions. She just starts easy, looks nice but runs like crap.

[zed1015]

The GS1000 carbs are vm26ss or vm28ss slide carbs i presume ???
Needing no choke means it is too rich and rough bottom end and struggling higher up when warm is likely worn and leaking choke plungers.
Also the 45 pilots and 120 mains are miles too big.
95 main is stock and with quality pods you need air correctors, stock needle position, stock pilots and 102.5 mains for 26's or 110 mains for 28's..

[lizzywhite45]

Hey, I’ve dealt with a similar setup before, it can definitely work, but it’s tricky. If it starts without choke, it’s likely running rich. The rough low end and breaking up at high speed sounds like jetting is way off, maybe oversized mains or worn choke plungers.

If it's running pods, that makes tuning even harder. The PO saying “it used to run fine” doesn’t mean much either, could’ve just idled okay.

Check jet sizes, needle position, and if the choke plungers are sealing. You might be chasing your tail unless you know exactly what's in there. Let us know the year of the bike and current jetting if you can.

[Nessism]

Those carbs are BS34 type. Stock is 107.5 main and 40 pilot. Put the pilots back to 40 for a start.

Check fuel level using the clear tube method. You can make a gauge by drilling out a stock drain screw, and attaching a piece of copper tubing.

Running an open pipe is stupid. Everyone but you hates the noise. That said, moving to a 120 main is likely too much.