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Lean?
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mixongw
Lean?
My GS1100GL seems to be running lean. During acceleration, it runs strong. It idles a little rough. Do these bikes idle smooth? When I bring the RPMs up to about 4K, it stutters alot (NOT under load). Can this be adjusted out with the mixture screws? The only mod is a Kerker 4-1. I'm not sure if the jets have been changed.Tags: None
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flyingace
I've heard that any changes to stock intake or exhaust will require re-jetting. Lean is usually the condition since most after-market products improve air flow. Hopefully some of the re-jetting experts will come to your rescue.
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I would bump up the main jet one full size to 120 (they go in 2.5 increments). The best way to dial in your mains is with a throttle chop. The stutter you speak of is probably from a lean needle circuit. If you have an adjustable needle I would lower it one notch or not adjustable use two shims wich is equivalent to one notch. You will also have to richen your pilot air screws by turning them out one at a time until you reach max idle. I also have Kerker 4-1 pipes and messed with jetting for quite a while, but eventually went to pods. (makes carb work a snap)1983 GS 1100E w/ 1230 kit, .340 lift Web Cams, Ape heavy duty valve springs, 83 1100 head with 1.5mm oversized SS intake valves, 1150 crank, Vance and Hines 1150 SuperHub, Star Racing high volume oil pump gears, 36mm carebs Dynojet stage 3 jet kit, Posplayr's SSPB, Progressive rear shocks and fork springs, Dyna 2000, Dynatek green coils and Vance & Hines 4-1 exhaust.
1985 GS1150ES stock with 85 Red E bodywork.
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mixongw
I adjusted the screws and it idles much better and the stuttering is almost gone. I found it's almost impossible to adjust the mixture screws at idle. I put it up to around 2K RPM and you can get a better feel for it there.
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Einar J Skog
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