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Carb rebuild issues

  • Thread starter Thread starter last337
  • Start date Start date
L

last337

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1983 GS1100ES carb rebuild.

As far as I can tell it has a dynojet kit as it has a 4 to 1 V&H and air pods. Ran fine before sitting up for too long and had never done carbs so did I took them down all the way, soaked them, changed all o-rings, changed float gaskets. I assembled according to BS-CV rebuild tutorial. Adjusted float heights (they were barely off). Re-assembled, thought I was good to go.

Used suggested setting on air jets of 2.5 turns.

First crank, started right up. Seemed to run quite rich as I was getting white smoke from pipe. Adjusted the air jets out a bit and got it idling fairly well. Let it warm up and adjusted idle, adjusted speedo, started to roll it and it dies right when coming off idle if rolled too fast. If I roll slowly past the stumble it will creep up but sounds as if starving. I am assuming fuel delivery is off and it is leaning out but I am no expert.

I just pulled them again and on closer inspection I dont see anything wrong. I am about to crack them all apart again and check that I didnt miss something. I also put new plugs in but not sure this is enough to read anything worthwhile from them. I also havent been able to balance them but I cant imagine balance issues would be enough for them to not even spool up right.

Any ideas?
 
I think they are DJ jets from the markings. BTW the bike ran fairly well before sitting up so the current setup is fairly correct. I can only imagine it was an error in reassembly or a defective something somewhere.


pilot air jet 180 (stock)
pilot jet 45 (stock)
jet needle x-1 (stock)
main jet 155 (112.5 stock)
 
Did you remove the pilot jets and hold them up to a light to make sure they are open? Rubber plugs over the pilots?
 
Yep, I just pulled 2 of them apart and the plug is still in place and the pilots were both open. Everything is coming apart so much easier. I am wondering if in an effort to not over-tighten I didnt tighten enough. Goodness knows they were hard to disassemble so maybe I just need to snug everything more. I am always worried about brass on aluminum.
 
last337 said:
Used suggested setting on air jets of 2.5 turns.
Click to expand...
Some will suggest 2.5 turns, others will suggest 3 turns. Either one will need some fine-tuning and might end up in the 2.5 range, but I find it easier to start with 3.


last337 said:
First crank, started right up. Seemed to run quite rich as I was getting white smoke from pipe.
Click to expand...
Your white "smoke" was probably just some condensation in the engine and exhaust system that was turning to STEAM, not smoke.


last337 said:
Adjusted the air jets out a bit and got it idling fairly well.
Click to expand...
You don't have any "air jets" on those carbs. The only externally-adjustable items are idle speed, carb sync and pilot mixture. The mixture screw (Suzuki calls it "pilot screw") will RICHEN the mixture if you turn it out because it controls a mixture of fuel and air, not just air.

.
 
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