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sporty tank vacuum line issue

Discussion in 'XJ Modifications' started by riide125, Sep 19, 2011.

  1. riide125

    riide125 Member

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    82 xj650 bobber sportster tank. Vacuum lines r missing. I know 3 r supposed be plugged 1runs to the petcock. Problem is differntank different petcock. What can I do
     
    riide125, Sep 19, 2011
    #1
  2. iwingameover

    iwingameover Active Member

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    Does your current petcock run on engine vacuum or is is on/off?

    If just on/off get another nipple cap at a parts store and cover the vacuum nipple.
     
    iwingameover, Sep 19, 2011
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  3. riide125

    riide125 Member

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    The line to the petcock is only to help the flow of fuel? I'm getting a lot of back firing and I thought the line might have something to do withit
     
    riide125, Sep 19, 2011
    #3
  4. MN-Maxims

    MN-Maxims St. Paul Minnesota

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    The original vacuum operated petcock uses vacuum to open the valve for fuel flow. Now you are useing a standard manual valve. You'll need to remember to turn the fuel off when you shut the bike off (the original valve did this for you). If your float valves leak you'll fill your crankcase with gas. As far as the bike backfireing make sure you do a wet float level test to make sure the float levels are right. If the fuel levels are low you'll be lean and that could cause problems. Hope this helps.

    MN
     
    MN-Maxims, Sep 19, 2011
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