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Extremely hot exhaust = lean?

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    Extremely hot exhaust = lean?

    Just put my bike back together today with the new V&H 4-1 system. Fired it up and found that the left exhaust pipe was extremely hot. Like touch it with a rag and the rag burns hot. Only ran it for a minute or so, but it was hot enough to begin yellowing the pipe a touch. Anyway, under inspection of the carbs, the pilot jet of the carb with the hot cylinder had 1/16" - 1/8" of an inch missing. I got the tip out of the carb but of course now I am waiting on new pilot jets. Could missing the tip of the pilot jet make it run that hot? I would think that missing the tip would make it run very lean...

    Also, any tips on getting the yellow out? :-/

    #2
    Lean = hot.

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      #3
      Re: Extremely hot exhaust = lean?

      Originally posted by pasteurized
      Also, any tips on getting the yellow out? :-/
      Pepsodent tooth paste?


      (You'll wonder where the yellow went, when you brush your pipes with Pepsodent):roll: :roll:


      Yes I am showing my age, but you can try a chrome polish.
      Bertrand Russell: 'Men are born ignorant, not stupid. They are made stupid by education.'

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        #4
        Re: Extremely hot exhaust = lean?

        Originally posted by pasteurized
        Anyway, under inspection of the carbs, the pilot jet of the carb with the hot cylinder had 1/16" - 1/8" of an inch missing. I got the tip out of the carb but of course now I am waiting on new pilot jets. Could missing the tip of the pilot jet make it run that hot? I would think that missing the tip would make it run very lean...
        :-/
        If you're talking about the sharp tipped pilot fuel screws, underneath, missing the tip will cause that cylinder to run richer. More fuel will pass through the pilot fuel screw passage.
        And on the seventh day,after resting from all that he had done,God went for a ride on his GS!
        Upon seeing that it was good, he went out again on his ZX14! But just a little bit faster!

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          #5
          Scared the crap outta me:

          Whenever my 81 GS1100e ran hot (ie: a cooool blue flame coming out the exhaust), it was because a float bowl was stuck and gas was also running out the vent tubes....a Malotov cocktail on wheels.

          My after-market pipes skipped yellow and went straight to red in about 1 minute...too rich.

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