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Thread: 1980 gs1100e Tuning Hack

  1. #1
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    Default 1980 gs1100e Tuning Hack

    Hey guys Iím new to the form. I just finished a build of a 1980 GS 1100e cafe build with pod filters and a 4 to 1 exhaust. When you take the needle out of the factory carburetor thereís a plastic spacer on top of it and a washer underneath the retainer clip, I removed the plastic spacer thatís on top of the retainer clip and the washer that was under the retainer clip and switched their places. I also added 120 main jets that I had laying around and it seem to be perfect after a little adjustment, I canít figure out how to post photos but the bike came out great and I might be a Honda convert. Just thought Iíd share.

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    -1980 GS1100 LT
    -1975 Honda cb750K
    -1972 Honda cl175
    - Currently presiding over a 1970 T500

  3. #3
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    He doesn’t need it; it is already running “perfect”.

    Quote Originally Posted by Tom R View Post
    Read about Charging Quick Test GS Charging Health GS Stator

    "The smallest giant of mankind, is he who stands on the shoulders of a larger giant who himself stands on the shoulders of yet a larger giant, and therefore sees the most light from GOD." Posplayr 2017 adapted from : Bernard of Chartres


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    Richieleo, if you want to post pics, weíd like to see the them. The best was is to use a photo hosing website to host the pics, allowing you to post up to 10 pics in a single post. One of the popular sites people use for this in Imgur.com. Itís free and is fairly easy to use. I have an instruction post linked in my signature.

    On the subject of signatures, itís advised to create one in your user settings, with your bike(s) year and model info, at a minimum.

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    Thanks for the pictures. Those are some odd ball pods that are not recommended. Maybe that is why you think it is running OK.
    Read about Charging Quick Test GS Charging Health GS Stator

    "The smallest giant of mankind, is he who stands on the shoulders of a larger giant who himself stands on the shoulders of yet a larger giant, and therefore sees the most light from GOD." Posplayr 2017 adapted from : Bernard of Chartres


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  8. #8
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    Tuning CV carbs can be a PITA. Good pods are a must IMO.
    80 GS1000E 150 main, 47.5 pilot, needle all the way up (fat needle) and 25mm float height, K&N pods w/V&H exhaust
    82 GS1100L 147.5 main, 45 pilot, needle all the way up (fat needle) and 25mm float height, UNI pods w/V&H exhaust
    82 GSX1100E 135 main, 45 pilot, needle at third notch from bottom and 22.5mm float height ***36mm carbs*** UNI pods w/V&H exhaust

    From my little bit of experience working with these CV carbs there is nothing set in stone, each one is a little different.
    Jets are also different depending on where you buy them. I've gotten jets from different places that were all stamped 150 but pinned anywhere from 142-155. I pin match my jets and put them in separate bags. I mark the pin size and don't pay any attention to the stamping on the jet itself. Even the jets I've gotten from 6Sigma have pinned at +/- of the stamped size.
    2016 Ducati 1299s
    1989 BMW K100RS
    1982 GS1100E-current build
    1980 GS1000E-sold
    1982 GS1100L-sold
    1982 CX500-sold

  9. #9
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    Quote Originally Posted by winmag4582001 View Post
    From my little bit of experience working with these CV carbs there is nothing set in stone, each one is a little different.
    Jets are also different depending on where you buy them. I've gotten jets from different places that were all stamped 150 but pinned anywhere from 142-155. I pin match my jets and put them in separate bags. I mark the pin size and don't pay any attention to the stamping on the jet itself. Even the jets I've gotten from 6Sigma have pinned at +/- of the stamped size.
    Even genuine Mikuni jets?
    Are your jet sizes listed above genuine Mikuni or Mikuni type? I’ve heard when you get to these larger sizes, it doesn’t make much difference if you use the genuine jets or not, but flow rates probably don’t match up across brands. Does this line up with your experience?
    Last edited by Tom R; 04-16-2020 at 10:35 AM.
    -1980 GS1100 LT
    -1975 Honda cb750K
    -1972 Honda cl175
    - Currently presiding over a 1970 T500

  10. #10
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    In my experience using a WB02 sensor and data recordings, if you just stick to Mikuni jets or the DynoJet jet kits you will be fine in adjusting mixture in steps.

    Realize the WBo2 is sensing is at the 4:1 collector and the CV carbs are very inaccurate for AFR control because the floats bounce all over the place.
    Read about Charging Quick Test GS Charging Health GS Stator

    "The smallest giant of mankind, is he who stands on the shoulders of a larger giant who himself stands on the shoulders of yet a larger giant, and therefore sees the most light from GOD." Posplayr 2017 adapted from : Bernard of Chartres


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