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

250-500cc What does "nikasil"piston size mean??

Discussion in '2 Stroke' started by chris anders, Jan 6, 2013.

  1. chris anders Husqvarna
    AA Class

    Husqvarna Motorcycle:
    2002 CR250 , 2002 CR125
    Other Motorcycles:
    2003 Suzuki RM250
    I've been shopping around for new piston/rings for my 02 cr250 - i notice pro x offers piston sizes of 66.34 up to 66.37- i understand that this is to take up for cylinder wear, but i thought my 250 piston size was 66.40 to start with ??? does the "nikasil" have something to do with this? i'm a little confused. any of you guys know anything to help me out?
    thanks
    chris anders, Jan 6, 2013
    #1

  2. MOTORHEAD Husqvarna
    Pro Class

    Location:
    Mount Vernon, Indiana
    Husqvarna Motorcycle:
    none
    Other Motorcycles:
    2014 YAMAHA YZ250
    There are 3 bore sizes of the OE cylinder. They are marked on the cylinder with an "A, B or C". It has to do with the finished bore size and the correct piston. Find the marking on your cylinder, normally stamper on the reed area, and order the matching piston.
    MOTORHEAD, Jan 6, 2013
    #2
    chris anders likes this.

  3. 2premo Husqvarna
    Pro Class

    Location:
    Northern NV
    Husqvarna Motorcycle:
    98 WR360, 1987 WR430, 1988 XC430
    Other Motorcycles:
    Sherco 300, 2002 KTM 380EXC
    where on the reed area?
    2premo, Jan 6, 2013
    #3

  4. chris anders Husqvarna
    AA Class

    Husqvarna Motorcycle:
    2002 CR250 , 2002 CR125
    Other Motorcycles:
    2003 Suzuki RM250
    Great info! thanks. Researched the nikasil thing-dont think it applies to my 02.
    chris anders, Jan 6, 2013
    #4

  5. MOTORHEAD Husqvarna
    Pro Class

    Location:
    Mount Vernon, Indiana
    Husqvarna Motorcycle:
    none
    Other Motorcycles:
    2014 YAMAHA YZ250
    Should be on the clutch side.
    MOTORHEAD, Jan 6, 2013
    #5

  6. MOTORHEAD Husqvarna
    Pro Class

    Location:
    Mount Vernon, Indiana
    Husqvarna Motorcycle:
    none
    Other Motorcycles:
    2014 YAMAHA YZ250
    Yes, you have a Nikasil bore.
    MOTORHEAD, Jan 6, 2013
    #6

  7. chris anders Husqvarna
    AA Class

    Husqvarna Motorcycle:
    2002 CR250 , 2002 CR125
    Other Motorcycles:
    2003 Suzuki RM250
    glad you shared that info with me - i was under the impression it was only much later models.
    thanks -again!
    chris anders, Jan 6, 2013
    #7