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  • #1

    1980 xs850 special

    We are working on my Sons 850, reworking the carbs and have a question. One, the pilot screw, it is capped off so you cannot tune it. Can we uncap it to tune it and leave it open or do we have to recap it? Also, the fuel level, we are setting them to actual fuel levels, not measuring only. Where should the level be, at the base of the bowl like the 1100? These are Hitachi carbs. I am a member of triples forum I just have a hard time navigating that software. I was hoping someone from here can help.
    Thanks,
    Tim
    1979 xs1100sf black.
    1973 Harley fx.
    2005 Honda 450x.
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  • #2
    Originally posted by timktm View Post
    We are working on my Sons 850, reworking the carbs and have a question. One, the pilot screw, it is capped off so you cannot tune it. Can we uncap it to tune it and leave it open or do we have to recap it? Also, the fuel level, we are setting them to actual fuel levels, not measuring only. Where should the level be, at the base of the bowl like the 1100? These are Hitachi carbs. I am a member of triples forum I just have a hard time navigating that software. I was hoping someone from here can help.
    Thanks,
    Tim
    On the XJ, caps over pilot screws indicate that most likely the pilots were never adjusted from factory, i.e., never serviced after the bike was purchased.

    Most of the time, the caps are missing. You have to remove the caps to screw the screws all the way in and then count the revolutions screwing them out.

    Caps help keep crud out and nothing more.

    I do not know anything about an XS850 other than the triples are awesome looking.

    cheers
    82 XJ1100 - sold
    96 Honda Magna 750 - Girlfriend's bike
    2000 ZRX1100 - sold
    2003 FJR1300 - Silver rocket

    Comment

    • #3
      Originally posted by timktm View Post
      We are working on my Sons 850, reworking the carbs and have a question. One, the pilot screw, it is capped off so you cannot tune it. Can we uncap it to tune it and leave it open or do we have to recap it? Also, the fuel level, we are setting them to actual fuel levels, not measuring only. Where should the level be, at the base of the bowl like the 1100? These are Hitachi carbs. I am a member of triples forum I just have a hard time navigating that software. I was hoping someone from here can help.
      Thanks,
      Tim
      Yes, base of the bowl. I have two 750's, and three 850's. But, word of advice: get rid of the Hitachi's, and find some MKII'S.
      1979 XS1100F
      2H9 Mod, Truck-Lite LED Headlight, TECHNA-FIT S/S Brake Lines, Rear Air Shocks, TKAT Fork Brace, Dyna DC-I Coils, TC Fuse Block, Barnett HD Clutch Springs, Superbike Handlebars, V-Star 650 ACCT, NGK Irridium Plugs, OEM Exhaust. CNC-Cut 2nd Gear Dogs; Ported/Milled Head; Modded Airbox: 8x8 Wix Panel Filter; #137.5 Main Jet, Viper Yellow Paint, Michelin Pilot Activ F/R, Interstate AGM Battery, 14MM MC, Maier Fairing, Cree LED Fog Lights.

      Comment

      • #4
        Well we are keeping these for now. I see why people get rid of these just based on the rebuild. My god whoever designed these should be shot! Got the caps off of the pilot screws only to learn one of the three was out only 1/4 turn and the other two were seated???
        Tim


        Originally posted by IanDMacDonald View Post
        Yes, base of the bowl. I have two 750's, and three 850's. But, word of advice: get rid of the Hitachi's, and find some MKII'S.
        1979 xs1100sf black.
        1973 Harley fx.
        2005 Honda 450x.

        Comment

        • #5
          Originally posted by timktm View Post
          Well we are keeping these for now. I see why people get rid of these just based on the rebuild. My god whoever designed these should be shot! Got the caps off of the pilot screws only to learn one of the three was out only 1/4 turn and the other two were seated???
          Tim
          Well, that does not make sense, as there is no way a proper stoichiometric A/F ratio was happening with those adjustments.
          1979 XS1100F
          2H9 Mod, Truck-Lite LED Headlight, TECHNA-FIT S/S Brake Lines, Rear Air Shocks, TKAT Fork Brace, Dyna DC-I Coils, TC Fuse Block, Barnett HD Clutch Springs, Superbike Handlebars, V-Star 650 ACCT, NGK Irridium Plugs, OEM Exhaust. CNC-Cut 2nd Gear Dogs; Ported/Milled Head; Modded Airbox: 8x8 Wix Panel Filter; #137.5 Main Jet, Viper Yellow Paint, Michelin Pilot Activ F/R, Interstate AGM Battery, 14MM MC, Maier Fairing, Cree LED Fog Lights.

          Comment

          • #6
            I would agree with that. We will see how it runs when properly adjusted.
            Tim

            Originally posted by IanDMacDonald View Post
            Well, that does not make sense, as there is no way a proper stoichiometric A/F ratio was happening with those adjustments.
            1979 xs1100sf black.
            1973 Harley fx.
            2005 Honda 450x.

            Comment

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