KTM 640 ADV Carb Issue???

Discussion in 'Thumpers' started by Katze, Jun 18, 2013.

  1. Katze

    Katze Full Time Rider

    Joined:
    Apr 10, 2011
    Oddometer:
    235
    Location:
    California Land Of Sunshine
    I've got a 2003 KTM 640 ADV. 20k miles on the clock. It runs like a top except for one thing.

    When I stop hard (stoppie) or on a steep down hill with the clutch in it dies. It also starts with the choke off when cold. It idles erratically... 1500 to 1800 RPM. My elevation is 6,600 ft.

    Once, and only once, I noticed a small puddle of gas on the pavement when it was parked. I have only 300 miles of riding time on this bike so my observations have been limited.

    I'm thinking float height? Worn carb?
    #1
  2. wrk2surf

    wrk2surf on the gas or brakes

    Joined:
    Dec 16, 2007
    Oddometer:
    7,592
    Location:
    THE exact center of California/Bass lake/Yosemite
  3. bmwktmbill

    bmwktmbill Traveler

    Joined:
    Jul 16, 2005
    Oddometer:
    5,554
    Location:
    Traveler
    There is an o ring above the rubber tipped needle, both will fail plus check float adj.

    And the BST thread.
    b
    #3
  4. Katze

    Katze Full Time Rider

    Joined:
    Apr 10, 2011
    Oddometer:
    235
    Location:
    California Land Of Sunshine
    Carb issue is fixed, thanks to the BST thread. The float level was way off. :clap:clap:clap

    The bike now idles great and no more crapping out on on downhills!

    Here's my solution to lifting that 7 gallon gas tank on and off in the garage during the "testing" phase of this operation.

    I took the tank off my 300 exc. Much lighter! Plus you can play with the carb while it's running! :lol3

    [​IMG]

    [​IMG]
    #4