1. 2 Stroke Husqvarna Motorcycles Made In Italy - About 1989 to 2014
     WR = 2st Enduro & CR = 2st Cross

250-500cc Dumb air screw question

Discussion in '2 Stroke' started by Jhunter, Jul 8, 2013.

  1. Jhunter Husqvarna
    AA Class

    Location:
    Atlanta
    Due to summer heat and humidity in Atlanta, my bike is running a little rich ('08 WR250). I'm thinking a half turn on the air screw may do it. So here's the dumb question. If I turn the screw clock wise, am I going leaner or richer?
    [IMG]
    Jhunter, Jul 8, 2013
    #1

  2. typeone Husqvarna
    Pro Class

    Location:
    central MA
    Husqvarna Motorcycle:
    07 TC270 + 09 WR165
    Other Motorcycles:
    08 X4 146 + 13 250RR
    not a dumb question... in is richer, out is leaner :thumbsup:

    EDIT: just to point out, the air screw is not visible in your pic. that center Philips w/locknut is the idle screw. the air screw is just behind the fuel hose in this pic.

    and some tips in case it helps:

    typeone, Jul 8, 2013
    #2
    john01 likes this.

  3. Jhunter Husqvarna
    AA Class

    Location:
    Atlanta
    Typeone - I had a 'senior moment' on the idle adjustment screw... So, just behind that tucked up tight is the brass air screw. Good notes above. I'll make some small adjustments until I get it figured out. The jetting is great and I really have no complaints about the carb so let see if this works for the summer temps. Thanks!
    [IMG]
    Jhunter, Jul 8, 2013
    #3
    typeone likes this.

  4. typeone Husqvarna
    Pro Class

    Location:
    central MA
    Husqvarna Motorcycle:
    07 TC270 + 09 WR165
    Other Motorcycles:
    08 X4 146 + 13 250RR
    no sweat :)

    i'm sure you know, but the Stealth Racing idle screw and ZipTy air screw make these quick adjustments sooooo much easier. nice upgrades.
    typeone, Jul 8, 2013
    #4
    john01 likes this.

  5. Dirtdame Administrator

    Location:
    Rock Springs Wy
    Husqvarna Motorcycle:
    11 WR300,13 WR125,18 FE501
    Other Motorcycles:
    17 Beta Xtrainer
    I put one of those nice spring loaded idle screws on my Mikuni.:love:
    [IMG]
    Dirtdame, Jul 8, 2013
    #5

  6. Idacurt Husqvarna
    AA Class

    Location:
    hailey,ID
    Husqvarna Motorcycle:
    07 WB177
    Other Motorcycles:
    Scorpa 175
    How many turns out are you? how does your bike start when warm?
    Idacurt, Jul 8, 2013
    #6

  7. Jhunter Husqvarna
    AA Class

    Location:
    Atlanta
    Every time I post, I find some new little 'tip or trick'. That spring loaded idle screw is perfect. I think I'll order of of those this week... Thanks Dirtdame.
    Jhunter, Jul 9, 2013
    #7

  8. Jhunter Husqvarna
    AA Class

    Location:
    Atlanta
    A half turn 'open' on the air screw made a huge difference. Once the temps drop and the humidity goes back down, I'll richen it up a little...
    Jhunter, Jul 22, 2013
    #8