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

All 2st Jetting Chat - Need Help? Post Your Questions Here

Discussion in '2 Stroke' started by Johnnymannen, Mar 24, 2010.

  1. QUATTRO Husqvarna
    AA Class

    I do not get the jetting 100% maybe someone could help.

    Wr250 2009 (riding sealevel)
    Mikuni new type
    Fmf gnarly
    Mix 1:30
    JD jetting kit
    Red needle 4 position
    420 main
    32.5 pilot
    Aircrew 1 turn out.

    The problem is wenn I go off throttle or a little less it's to lean.
    Riding 60kmh in 5 gear it's almost blubbering with 2mm throttle but riding 80km with a little more throttle it's getting to lean.
    Also when deep havy sand full throttle it's al ok but then I go a little off throttle to 5% it's again verry lean.
    What could I do?
    I ordered the htm racing head and inletspacers how will this effects the jetting?

    Best regards
    Marco
  2. lankydoug Husqvarna
    Pro Class

    Husqvarna Motorcycle:
    WR
    Read this

    http://www.iwt.com.au/mikunicarb.htm
    QUATTRO likes this.
  3. QUATTRO Husqvarna
    AA Class

    Thanks I will try to 35 pilot jet and raise the needle to 5
  4. lankydoug Husqvarna
    Pro Class

    Husqvarna Motorcycle:
    WR
    Make only one change at a time, if it helps it run better keep going in that direction. If the change makes it worse then obviously go back in the other direction. Remember it can be lean in one circuit and rich in another so pay attention to throttle position. You will learn the feeling of rich and lean as you get experience. The basics are the same for all carburetors only the circuits might vary a slight amount. A Lectron is probably the easiest since a needle/metering rod adjustment does 80% of the fuel regulation and the only overlapping circuit is the powerjet for approximately 7/8 to wide open
    QUATTRO likes this.
  5. QUATTRO Husqvarna
    AA Class

    I will first install the racing head black edition from HTM :-) otherwise do i have to start over again.
    Did anyone played with ignition timing? A little earlier or later?
    Maybe i will do some dyno testing at our company we made a tool/adjustemt to messure bikes at our Dyno for cars
    Does anyone messered lambda by a two stroke? at a dyno?
  6. Maxixp11 Husqvarna

    Husqvarna Motorcycle:
    WR 144 2010, SM 125 S 2007
    Other Motorcycles:
    Aprilia RS 125
    Hello guys, I've got a problem with my 2010 Husky WR 144 (Mikuni Tmx 38 carb) . The bike keeps sputtering in the higher rpms, no matter what main jet I'm running. In winter I usually ride a 480 main jet. I tried out the jets all down to 450, but the problem stayed exactly the same. I've also installed a new airfilter, cleaned the whole carburator and installed a new spark plug. Has anyone got an idea what the problem could be? I'm thankful for every help. And you may excuse my english because I'm german..
  7. lankydoug Husqvarna
    Pro Class

    Husqvarna Motorcycle:
    WR
    Check spark plug wire and coil for spark burning away the center or arcing. Also remove coil and clean the ground and also check the wiring to the coil and stator for wires worn and exposing the copper to ground. You can also ohm the stator and the coil while you have it all unplugged.
  8. Jontteyy Husqvarna
    C Class

    Husqvarna Motorcycle:
    Husqvarna SM/CR125 -05
    I have Husqvarna SM125, model 2005. I have fitted 5-port CR125 -09 cylinder, older TMX38 carb, Dep pipe, BUD Racing cylinder head, V-Force 3 on it. Does anybody have any idea for good jetting for this carb?
  9. Miezie666 Husqvarna
    AA Class

    Location:
    Germany
    Husqvarna Motorcycle:
    WR 125 2013, WRK 125 1993
    Other Motorcycles:
    YZ 125 2005, RM 125 1983, XT600 1988
    Start with a 470/480 main jet and work your way down till ist perfect.
    i had a 40leak jet and went to a 50 which is far better- but i live on sea level- so that will be different based on where you live!
    Also i would make sure you have 2 holes on the exhaust side of your piston drilled into the skirt to lube the exhaust bridge.
    If not- its more than likely you will seize your engine.
  10. Tentontimmy Husqvarna
    A Class

    Location:
    Caribbean
    Husqvarna Motorcycle:
    2012 WR125
    Other Motorcycles:
    Suzuki GSX-R1000
    Any thoughts? Looks lean to me.

    DSC01292.JPG
  11. Sendman Husqvarna
    A Class

    Location:
    Ukraine
    Husqvarna Motorcycle:
    Husky 144
    A huge carb question
    Hi all
    Here what’s a deal – I was riding cpi sx 50, the specific is – it has max torque at max rpm, no power valve, no low rpm traction, so to make it ride I have to go wide throttle open. That is the reason I tune carb to make it run perfect at 100% open throttle.
    Now I bought husky, and don’t understand for now how to tune carb. Can it run perfect at all throttle range? Should I do some tune in order to my riding style? What is the basics for tune it?
  12. Sendman Husqvarna
    A Class

    Location:
    Ukraine
    Husqvarna Motorcycle:
    Husky 144
    mb someone can point, where i can get info like that?!
  13. Sendman Husqvarna
    A Class

    Location:
    Ukraine
    Husqvarna Motorcycle:
    Husky 144
  14. Sendman Husqvarna
    A Class

    Location:
    Ukraine
    Husqvarna Motorcycle:
    Husky 144
    125cc+tuning pipe
    34mm carb - from what size jets to start?
  15. rockdancer Husqvarna
    Pro Class

    Location:
    Sunshine Coast, Australia
    Husqvarna Motorcycle:
    TE250 2014 2t
    Anyone advise how to remove the needle jet - needle nozzle ?
    ie thing that needle sits in
  16. Oldscool Husqvarna
    A Class

    Location:
    South Australia
    Husqvarna Motorcycle:
    2013 wr125 now 165
    Other Motorcycles:
    2001 rm125
    Which carb?
    If I recall correctly, mikuni tmx push out from the float camber up through the slide chamber. You need to remove the main jet then the larger nut (10mm??) above the main jet.
    Keihin pwk I understand are not serviceable or removable, but am prepared to accept I may be wrong.

    BE GENTLE
  17. rockdancer Husqvarna
    Pro Class

    Location:
    Sunshine Coast, Australia
    Husqvarna Motorcycle:
    TE250 2014 2t
  18. Sendman Husqvarna
    A Class

    Location:
    Ukraine
    Husqvarna Motorcycle:
    Husky 144
    hello to a big community
    i tuning chinese 34mm carb (PWK copy) on my 125cc husky, for now it's 50 pilot and 175 main, needle - second clip from top. Spark pretty lean. And have this problem - stalls after dropping trottle. And have some hitch opening throttle from idle. Middle range and full throttle goes perfect



    please help
  19. melias24 Husqvarna
    A Class

    Location:
    Whitsundays region, Queensland, Australia
    Husqvarna Motorcycle:
    2010 TC250, 2013 CR125
    Other Motorcycles:
    Ty250/80, xr200r, xl185s
    I need help determining what jetting would be best for subtropical (temp range between 15 to 40 degrees Celsius) near sea (humidity range between 30% to 80%) and a less then 50m elevation from sea level ?
  20. Fredrik Husqvarna
    A Class

    Location:
    Sweden
    Husqvarna Motorcycle:
    2st cr125 2014 for the "kids"
    Other Motorcycles:
    ktm, honda
    Anyone got the part number on the rm needle for cr125?