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xj650 intake manifolds

Discussion in 'XJ Technical Chat' started by RiceBiker, Jan 11, 2016.

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  1. RiceBiker

    RiceBiker Member

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    I'm experiencing an erratic idle and I think I'm getting vacuum leaks through the intake manifolds. Intake manifolds are all cracked. I saw a set for an XJ550 available. Will these fit an XJ650?

    1982 XJ650, Maxim,
     
    RiceBiker, Jan 11, 2016
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  2. Stumplifter

    Stumplifter Well-Known Member

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    I don't think so.

    Verify there is a leak with an unlit propane torch (w/ gas turned on).

    If idle changes whilst torch is being 'sprayed' around boots then consider doing the bicycle inner tube trick to repair them.
     
    Stumplifter, Jan 12, 2016
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  3. hogfiddles

    hogfiddles XJ-Wizard, Host-Central NY Carb Clinic Moderator Premium Member

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    not interchangeable
     
    hogfiddles, Jan 12, 2016
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  4. RiceBiker

    RiceBiker Member

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    I'll try it. Has anyone tried liquid electrical tape? Or a combo of inner tube and tape?
    Thanks
     
    RiceBiker, Jan 12, 2016
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  5. Xjrider92117

    Xjrider92117 Active Member

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    Xjrider92117, Jan 12, 2016
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  6. RiceBiker

    RiceBiker Member

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    I did the liquid tape and it made a dramatic improvement. I'll probably add the inner tube later. It was also way too lean. I had 41's in there and I needed 4-5 turns out on the mixture screws just to idle. I also had no power from idle to about 20 mph (sounded like a Harley) then the power would kick in like a beast. I moved up to 45's with 2.5 turns out. I removed the little brass washers that I used to lift the main jet needles. So I'm back to stock there. Much smoother now.
     
    RiceBiker, Jan 12, 2016
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