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  • #1

    Pilot jet confusion

    I just replaced the mains and pilots with 145 and 45 sizes respectively.
    According to the Clymer manual the 78 is stock with 137.5 and 42.5 jets, the mains I removed are indeed marked 137.5 but the pilots are clearly marked 45.
    Am I a victim of a really silly PO that would just upgrade the pilots and leave the mains alone, or is there an error in the manual?

    Either way, if anyone has a need for 137.5 mains or 45 pilots, let me know.
    Oh also, the 1.45mm drill does NOT fit inside the 137.5 mains. but does fit the 145 mains rather well, so if anyone is interested in going that route, again let me know.
    '78 E "Stormbringer"

    Purrs like a kitten, roars like a lion, runs like a gazelle (being chased by a cheetah).

    pics http://s1209.photobucket.com/albums/...tormbringer45/
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  • #2
    78's had 45's for pilots. its an error in the manual.
    Nathan
    KD9ARL

    μολὼν λαβέ

    1978 XS1100E
    K&N Filter
    #45 pilot Jet, #137.5 Main Jet
    OEM Exhaust
    ATK Fork Brace
    LED Dash lights
    Ammeter, Oil Pressure, Oil Temp, and Volt Meters
    Green Monster Coils
    SS Brake Lines
    Vision 550 Auto Tensioner

    In any moment of decision the best thing you can do is the right thing, the next best thing is the wrong thing, and the worst thing you can do is nothing.

    Theodore Roosevelt

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    • #3
      78's had 45's for pilots. its an error in the manual.
      In Yamahas offical "book of lies" in both the carb section and in the section that's supposed to show "corrections" for mistakes in the manual as well as in the tech tips here it shows 42.5 for the pilot jet.

      All my stock 79's have 42.5's, never have had a E though.

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      • #4
        I think this error is duplicated in the Haynes manual too. I found the same on my F. I just put the new jets in as per the Georgefix kit and the bike runs fine...
        XS1100F 1980 European model. Standard. Dyna coils. Iridium plugs. XS750 final drive (sometimes). Micron fork brace. Progressive front springs. Geezer regulator/rectifier. Stainless 4 into 2 exhaust. Auto CCT (Venturer 1300) SOLD. New project now on the go. 1980 European model.

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