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

250-500cc 2011 WR250 jetting

Discussion in '2 Stroke' started by stretchrcr, Sep 13, 2011.

  1. stretchrcr Husqvarna
    AA Class

    Location:
    Orange County, CA
    Hi Guys,
    I searched around but didn't find anyone discussing 2011 250 jetting. Anyone get these all figured out? I'm pretty experienced with this type of stuff, but I always like to hear what others have come up with. I'm in S. CA and usually ride at around 2000 ft.

    Here's what's in it
    380 main
    17.5 pilot
    6CFY5-74 needle clip in #3 (A 6GAY69-74 also came with it)
    5.0 slide

    In my 09 I've been running
    400 main
    35 pilot
    6BFY43-74 needle clip in #2
    4.0 slide

    Thanks.
  2. ScottyR Husqvarna
    AA Class

    Location:
    Mitchell, ON
    Have you ridden it yet? There is a jetting update to do on that bike. Chances are it will seize up with that jetting.
  3. stretchrcr Husqvarna
    AA Class

    Location:
    Orange County, CA
    Haven't ridden it yet. I have the jetting kit, I'm just wondering what everyone is running.
  4. 454x Husqvarna
    Pro Class

    Location:
    Dunnigan,Ca.
    Husqvarna Motorcycle:
    2012 CR165 w/36mm lectron.
    Other Motorcycles:
    2014 BETA 300RR w/36mm lectron.
    I wonder if the new digital ignition has anything to do with the different jetting.
  5. lankydoug Husqvarna
    Pro Class

    Location:
    MO
    Husqvarna Motorcycle:
    WR
    Other Motorcycles:
    TM 300en
    My 09 is similar to yours

    Year & Bike Model = 2009 WR250
    Carb = Mikuni
    Pipe & Silencer =Stock
    Other engine mods = none
    Premix ratio & fuel type = 32:1 Lucas synthetic blend & VP 110
    Temperature range (deg F) = 70 degrees F humidity 50%
    Elevation (feet) = actual altitude is 1,100 ft. air density altitude is usually between 1500ft and 2500ft in this area but I have seen 3500 ft air in the humid summer.
    Main jet =420
    Pilot jet = 32.5
    Needle = E16BFY43-74 stock
    Clip position = 2nd clip with 1/2 step washer/spacer
    Air screw setting = 1 1/2
    Slide = stock 4.0
  6. utopia Husqvarna
    AA Class

    Location:
    Jackson, WY
    Husqvarna Motorcycle:
    WR250, WXC125
    Interesting. That looks like the jetting in the restricted model. Did other jets come with it too?

    In my 09 at 6000 ft I'm using the GAY needle in the 2nd, and 30 Pilot. I have been using a 360 main, but I need to check that again since I just adjusted my powervalve.