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funky running when on reserve

Discussion in 'The Garage' started by Triumpy boy, Sep 14, 2019.

  1. Triumpy boy

    Triumpy boy XS650 Member

    Ive been lurking on this site for years however Im baffled by a fuel delivery issue. My 82 hearitage runs just fine until the fuel level gets very low then the left cylinder cuts in and out. Opening the throttle will improve this situation but only until let off. If I stop and fill up things are grand again.
  2. arcticXS

    arcticXS XS650 Guru Top Contributor

    Partially blocked strainer (mesh filter) on the reserve bore of the petcock (s)?
    grizld1 likes this.
  3. grizld1

    grizld1 Grumpy old man Top Contributor

    Common problem, crud settles to the bottom of the tank and blocks fuel feed when you switch to reserve. Remove the petcocks and flush the tank with water at the car wash or with a pressure washer, then rinse with a bit of alcohol to pick up any remaining moisture, or blow dry with the outlet of a shop vac, or borrow the wife's hair drier.

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