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    Carb Swap

    I changed the carbs on mt 1980 GS1000G today with a set I rebuilt from a GS1100e. I changed the idle jets from 45 to 40, put in new o-rings from Robert Barr and cleaned them good. Main jets are 112.5 and everything else is stock in the carbs. I sealed the air box, installed new intake boots and put new o-rings on the intake manifold. The mixture screws are out 2.5 turns from softly seated.

    The bike started up right away and after a little idle adjust she seemed content. I then used a color tune plug to check combustion color and it was nice and blue.

    The only thing I noticed is that the exhaust pipes were not at even temperature to the touch, the two right cylinders were noticeably cooler than the lefts. I have not sync'd them yet. Would this cause uneven exhaust temps?

    Cheers.

    #2
    The main air jets are different on the chain versus the shaft 34mms. You may have to drill them out or run a larger main jet.
    The uneven temps could most certainly be that you haven't sync'd them.
    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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