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XJ750J Refurb

Discussion in 'XJ Technical Chat' started by turpentyne, Jul 5, 2018.

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  1. XJ550H

    XJ550H Well-Known Member Premium Member

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    keep an eye on the rtv it will break down after some time in contact with gas
     
    XJ550H, Dec 23, 2018
    #51
    k-moe likes this.
  2. turpentyne

    turpentyne Active Member

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    Oh! Bummer. It said it resists oil and petroleum products, so I assumed it was ok. Maybe a little dumb on my part!
     
    Last edited: Dec 23, 2018
    turpentyne, Dec 23, 2018
    #52
  3. turpentyne

    turpentyne Active Member

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    Took my first stab at using the carbtune. The carbs went through a complete break-down and church-cleaned. The mixture screws set right at 2 1/2 turns. First I put the color tune on there, I got blue, but with some white pops and the idle was hanging like a banshee, higher with each turn. Basically, acting like it was lean... or maybe just wayyy out of synch.

    So I dropped the main idle screw to about 1200 rpm, and tried out the carbtune. When I got everything dialed in, it definitely seems to have gotten rid of (most of) the hanging idle, but I was surprised how low the steel bars were. I would've expected higher. Where should they be?

    Here's what I've got right now. thoughts on what you hear?

     
    turpentyne, Dec 29, 2018
    #53
  4. XJ550H

    XJ550H Well-Known Member Premium Member

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    idle rpm is 1050


    your bars are equal and rise equaly thats always good
     
    XJ550H, Dec 29, 2018
    #54
  5. turpentyne

    turpentyne Active Member

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    oh! A little lower than I'm setting it. ok.. I'll adjust. I just came back in from fiddling with it. This time the bars were a little higher, around the 12-mark, so that's more like I expected.

    Unfortunately, any more fiddling will have to wait. Time to help someone put an outdoor fire pit thing together.
     
    turpentyne, Dec 29, 2018
    #55
  6. turpentyne

    turpentyne Active Member

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    Seems the bike is dialed in, more or less, but I'm curious about opinions on the start-up.

    The last three weekends I've started it up, to do a little more fine tuning, but I notice after a week, I have to spray a little starter fluid down the airbox the first couple times. Choke's wide open, and from what I understand I shouldn't often need that. I'm in icy-cold Phoenix, where it's a whopping 63 degrees here in the dead of winter. (18 C to the rest of the world).

    I'm running off a little fuel container with a simple on-off switch, at the moment - not the tank with its vacuum petcock. I wouldn't think that had anything to do with it.

    Thoughts?

    (ps. the carbs were taken to church for a 100% teardown and rebuild with new jets and whatnot.)
     
    turpentyne, Jan 5, 2019
    #56
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