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

250-500cc Cooked my top end on my 2012 WR300

Discussion in '2 Stroke' started by Jaz_83, May 30, 2014.

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  1. Jaz_83 Husqvarna
    B Class

    Husqvarna Motorcycle:
    2012 WR300
    Bike is stripped, engine out, will pull the top end off tonight. Picks to come.
    Jaz_83, Jun 2, 2014
    #21

  2. shane13 Husqvarna
    B Class

    Location:
    brisbane
    Husqvarna Motorcycle:
    husqvarna wr300 13
    Does your bike still have the thermostat ? Maybe that failed
    shane13, Jun 2, 2014
    #22

  3. Jaz_83 Husqvarna
    B Class

    Husqvarna Motorcycle:
    2012 WR300
    So it looks as though the engine has already had a fresh piston and rings. It has a pro x 6394 piston in it already. image.jpg
    Jaz_83, Jun 3, 2014
    #23

  4. Jaz_83 Husqvarna
    B Class

    Husqvarna Motorcycle:
    2012 WR300
    image.jpg
    Jaz_83, Jun 3, 2014
    #24

  5. Jaz_83 Husqvarna
    B Class

    Husqvarna Motorcycle:
    2012 WR300
    image.jpg

    Attached Files:

    Jaz_83, Jun 3, 2014
    #25

  6. Jaz_83 Husqvarna
    B Class

    Husqvarna Motorcycle:
    2012 WR300
    image.jpg
    Jaz_83, Jun 3, 2014
    #26

  7. Jaz_83 Husqvarna
    B Class

    Husqvarna Motorcycle:
    2012 WR300
    image.jpg
    Jaz_83, Jun 3, 2014
    #27

  8. Jaz_83 Husqvarna
    B Class

    Husqvarna Motorcycle:
    2012 WR300
    image.jpg
    Jaz_83, Jun 3, 2014
    #28

  9. gary alger Husqvarna
    B Class

    Husqvarna Motorcycle:
    wr125
    Other Motorcycles:
    yz250
    Looks like serious signs of lean detonation.....My 300 seized with stock jetting (430) main and stock needle (gay) in cool weather....

    I would think that jetting and running in the dunes is a recipe for disaster.....I switched to a keihn, and have no issues since.
    gary alger, Jun 3, 2014
    #29

  10. Motosportz CH Sponsor

    Location:
    Vancouver WA
    Husqvarna Motorcycle:
    2021 TE250i, 570 Berg, 500 KTM, 790R
    Other Motorcycles:
    many
    Looks like your typical lean seize. Needs rejetted. Also IMHO run 32-1 or 40-1 anything with less oil is asking for trouble. Lots of these modern oils say 60 or even 100 to one is OK but I disagree. Less lube is less lube no matter how you slice it. I'd rather deal with a little spooge and cost of oil than ruin a motor. Some people can put around on trails and be fine at 60-1 or less oil but at some point your going to be stuck on a big hill, overheating your motor and thats when the issues will start. This oil in the gas is solely responsible for lubing the crank, rod, piston, cylinder, and powervelves. More oil is more oil no matter how good you think your oil is.
    Motosportz, Jun 3, 2014
    #30
    wait4me and Jersey Woods like this.

  11. Motosportz CH Sponsor

    Location:
    Vancouver WA
    Husqvarna Motorcycle:
    2021 TE250i, 570 Berg, 500 KTM, 790R
    Other Motorcycles:
    many
    It was. it is one of the many reasons I like the Lectron carb. Going to the dunes? Reach down and turn the knob and richen the carb for the extra load.
    Motosportz, Jun 3, 2014
    #31

  12. shawbagga Husqvarna
    Pro Class

    Location:
    Eaton, Western Australia
    Husqvarna Motorcycle:
    None
    Other Motorcycles:
    2018 Gasgas XC250
    ^yeh thats my idea of jetting right there!^. was reading this thread & thinking just the same. 1/2 a turn would suffice wouldnt it? my PJ is a little too hard to turn by fingers(need little flat blade or needle node pliers) but still lazy man's jetting which is A-ok with me:thumbsup:
    shawbagga, Jun 3, 2014
    #32

  13. Jaz_83 Husqvarna
    B Class

    Husqvarna Motorcycle:
    2012 WR300
    Have dropped the head and cylinder off to my machinist for cleaning up. Will order the piston and lectron next week. The mikuni is no longer welcome in my life.
    Jaz_83, Jun 4, 2014
    #33
    johnnyboy likes this.

  14. Brian Scott Husqvarna
    AA Class

    Location:
    Bainbridge Island, Washington State
    Husqvarna Motorcycle:
    '11 WR 300
    Other Motorcycles:
    '01 CR 500R
    You might consider having your local bike shop closely inspect the cylinder after your machinist is done to make sure you have adequate cross hatching on the nikasil liner. You may have galled the cylinder enough to compromise the nikasil. If that's the case you'll need to send it out for a relining.
    Brian Scott, Jun 4, 2014
    #34

  15. Jaz_83 Husqvarna
    B Class

    Husqvarna Motorcycle:
    2012 WR300
    The machinist/engine builder I use is one that many of he local bike shops use so I am
    Confident in their judgement. They will have it ready tomorrow and we will check the post hone measurement before selecting our piston. We were a little surprised to find the piston that was in he bike was actually a Ktm part number.
    Jaz_83, Jun 4, 2014
    #35

  16. Jaz_83 Husqvarna
    B Class

    Husqvarna Motorcycle:
    2012 WR300
    Got my freshly honed cylinder and head back today. Looks good, cleaned up well. Have also ordered wossner piston kit, should have it by Tuesday.
    Jaz_83, Jun 6, 2014
    #36
    woodsrider likes this.

  17. Xcuvator Husqvarna
    Pro Class

    Location:
    Scholls Oregon
    Husqvarna Motorcycle:
    TE450,610 WB165,WR250 WR360 & XC430
    Other Motorcycles:
    yes
    When you check/change your jetting don't leave the slide out of the equation. I saw a new WR 300 seize for this reason. All the other jetting was good but for some reason the wrong slide came installed from the factory.
    Xcuvator, Jun 6, 2014
    #37
    Motosportz likes this.

  18. Jaz_83 Husqvarna
    B Class

    Husqvarna Motorcycle:
    2012 WR300
    It's current running the number 5 slide.
    Jaz_83, Jun 6, 2014
    #38

  19. Dirtdame Administrator

    Location:
    Rock Springs Wy
    Husqvarna Motorcycle:
    11 WR300,13 WR125,18 FE501
    Other Motorcycles:
    17 Beta Xtrainer
    Use a #4!
    Dirtdame, Jun 6, 2014
    #39

  20. Jaz_83 Husqvarna
    B Class

    Husqvarna Motorcycle:
    2012 WR300
    What effect should I expect from the #4 slide
    Jaz_83, Jun 6, 2014
    #40
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