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

125-200cc wr 125 not running as it should!

Discussion in '2 Stroke' started by smalldubster, Oct 3, 2010.

  1. smalldubster Husqvarna
    C Class

    Location:
    norway
    125 wr 2007 :) tmx 38
    I just got a simple question, i use 400 main-jet, and 3% oil mixture. i dont know what stage my needle are at, but does someone know a good setup on my carb to make my bike run clean?

    I live in Norway, and we have around 10-20 C in temp depending each day. Basically i want my bike to run clean, and much acceleration as possible. my sprockets are 13-45 :)


    Thanks for all answer, and sorry if anyone feels my post annoying, im new to this forum :excuseme:

    anyways drive safe! :thumbsup:

    Edit: carb and model year is now editet, sorry :D!
  2. Bill502 Husqvarna
    AA Class

    Location:
    Upstate NY
    Husqvarna Motorcycle:
    2007 WR167 1978 CR250 1938 sw maus
    Other Motorcycles:
    1970 Triumph T100C 1973 Honda TL125
    You need to tell the year of your bike so people here can help you, as there are two different carbs for the older and newer bikes.
  3. Coffee CH Owner

    Location:
    Between homes - in ft Wayne IN
    Husqvarna Motorcycle:
    2006 TE250, 2013 TR650 Terra - sold
    In no way is your post annoying. Please don't hesitate to ask questions. That is what the forum is for.

    :cheers:
  4. smalldubster Husqvarna
    C Class

    Location:
    norway
    main post editet :D
  5. Bill502 Husqvarna
    AA Class

    Location:
    Upstate NY
    Husqvarna Motorcycle:
    2007 WR167 1978 CR250 1938 sw maus
    Other Motorcycles:
    1970 Triumph T100C 1973 Honda TL125
  6. pvduke Husqvarna
    Pro Class

    Location:
    ... on the gas...
    Husqvarna Motorcycle:
    tripple-hondo hoosk...
    Other Motorcycles:
    dozens of them, kicked to the curb
    http://www.cafehusky.com/forums/showthread.php?t=8039

    which part of the "thottle opening" are you having issues with and what is it doing?

    do you have a lot of jetting experience w/ a 2-cycle? if not i suggest a dealer or a shop to get you in the ball park.

    if you want to do it yourself:

    * if the carb is the orriginal-
    make sure your air filter is clean, your bike is ready to race- fully serviced, no mechanical issues!

    * start with your main jet at least one size, maybe two sizes larger than factory recomended, the needle clip in the middle slot, the slow jet @ factory recomended size and the AS 1.5 turns out. use a new plug AFTER warming up your bike.

    * INSTALL A NEW PLUG in the warmed up engine. find a flat open space. start the bike, get it rolling right away and rev it out in 1st, 2nd and 3rd gears at least- till it hits the limiter- you want it to be as clean of pulls as possible. then, pull in the clutch, hit the kill switch and chop the throttle closed NOW, do NOT let it idle. then coast to a stop, READ THE PLUG. dark brown? good. anything lighter and it's too lean.
    this is how you establish your baseline main jet size and you are safe and can now make adjustments if needed for top end performance once your low speed circuits are tuned.

    * next you can adjust your air screw/slow jet for off-throttle snap, and, your midrange tip-in to 3/4 TO with the needle- BE VERY VERY CAREFUL IF YOU LOWER THE NEEDLE.
    always start rich and got lean in very small increments and ONLY DO ONE CHANGE AT A TIME.
    one you get your low speed circuits dialed in you only need to change the main for large elevation changes, for the most part, sans a very small tweak of the AS.

    * make one change at a time. read the plug often.

    * if you find you're needle clip is close or at the bottom or the top- stop and change the main.

    * it takes time and RIDING to jet a 2 stroke and never take for granted anyones recipe for jetting. always verify your recipe by reading the plug. then, get a marking pen and write the jet sizes on the float bowl.

    * when you park your bike for the week- ALWAYS DRAIN YOUR CARB AND TANK.

    any ? please PM me etc....or ask here.
  7. dartyppyt Husqvarna
    Pro Class

    Location:
    Illinois
    Husqvarna Motorcycle:
    17 TE 150, 82CR 500
    Other Motorcycles:
    82 125,250,430&500 79 390 83 250
    PVduke,

    You did a nice job of explaining that!
  8. smalldubster Husqvarna
    C Class

    Location:
    norway
    <

    Thank you very much :)
    I have some experience yes :) about the throotle, the problem is that at low rpm in 4-5 & 6 gear and when i go full throotle the bike dies.. but only on very low rpm. Before i had 420 main jet, and i had this problem all the time.

    about the spark plug, i will do that :)

    Anyways, thanks for all the fast and good answers ! :thumbsup:
  9. pvduke Husqvarna
    Pro Class

    Location:
    ... on the gas...
    Husqvarna Motorcycle:
    tripple-hondo hoosk...
    Other Motorcycles:
    dozens of them, kicked to the curb
    thanks man. i like helping my husky buds out.


    oooo- that's a tuffy cuz im not sure what throttle opening you started at in 4-5-6 gear... try raising the needle (lowering the clip/richening it) one notch. if that does not work, put the clip back in the middle and go up one size main jet and retry. if it dies when you whack it open it's probably lean.


    do your baseline main jet verification as i outlined above. check the chart in the link, go by throttle opening, not RPM at first. w/ some tinkering in about 20-30 mins youll have it safely screaming. meeeeeeeeeeep! meeeeeeeeeeeeeeep!
  10. smalldubster Husqvarna
    C Class

    Location:
    norway
    sweet, il give som feedback, about the results :thumbsup:!
    cant wait to hear that meeeep sound :D
  11. Motosportz CH Sponsor

    Location:
    Vancouver WA
    Husqvarna Motorcycle:
    2021 TE250i, 570 Berg, 500 KTM, 790R
    Other Motorcycles:
    many
    Are you riding this on the street because 13/45 is real tall gearing. For woods work I run 13/52 with a 144 kit.
  12. rockdancer Husqvarna
    Pro Class

    Location:
    Sunshine Coast, Australia
    Husqvarna Motorcycle:
    2013 WR125, 2019 FE350
    It must be road - I second the 13f /52 rear

    I have had an 06 and 08 wr 125 with that carb . With a 380 main but mainly hotter more humid here
    You may need to adjust the needle to suit the condiitons - winter /summer
    A low throttle bog is normmally too lean try a richer needle setting - - clip one from bottom setting or lok at the pilot jet size

    read up on carb tuning It will not always be perfect though
  13. R_Little Husqvarna
    Pro Class

    Location:
    NJ
    I have the same carb and run a 380 main.

    I'd try a 390 and see what happens.