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

125-200cc husky cr 125 engine to replace sms engine ? possible ?

Discussion in '2 Stroke' started by bashy22, Oct 29, 2015.

  1. bashy22 Husqvarna
    A Class

    hi i have a husky sms 125, and have just bought a cr 125 engine is it possible to just switch the engine out and use the cr back plate and use my sms stator and flywheel, or am i going to see problems ?
  2. Miezie666 Husqvarna
    Pro Class

    Location:
    Germany
    Husqvarna Motorcycle:
    none
    Other Motorcycles:
    2x YZ 125, 1x YZ250 2005, XT600 2KF
    As far as i know the cr ignition will not fit- also the crankshaft should be different- so your rotor will not fit right- but maybe thats only because i have a 1998 CR a 2004 WRE and a 2013 WR engine to compare with.
    Maybe there are some years wich will be interchangeable.
  3. bashy22 Husqvarna
    A Class

    Ok my cr engine is 2004 and sms engine is 2010
  4. R-J van Hulst Husqvarna
    Pro Class

    Location:
    Cambodia
    Husqvarna Motorcycle:
    WR 125 + 40 = WB 165 and a SM165
    Other Motorcycles:
    Honda CB 400 Vtec 3
    year 98 is the older type of engine and is different
    everything from 2000 should not have a problem to change out the ignition systems in the cases

    the issues could be more on the oil pump/ power valve actuation.

    Robert-Jan
  5. bashy22 Husqvarna
    A Class

    Ok the powervalve system looks the same on both bikes mechanical pv
    , I did think I could just change out the stator, my stator back plate doesn't have any holes to advance timing so hoped I could use the cr back plate.

    Can run premix if need be
  6. bashy22 Husqvarna
    A Class

    Wasn't sure as yeah someone else has just changed cr topend and the sms and cr ports are 2mm in hight difference, and his engine run backwards so thought the timing on engine where totally difftrent
  7. R-J van Hulst Husqvarna
    Pro Class

    Location:
    Cambodia
    Husqvarna Motorcycle:
    WR 125 + 40 = WB 165 and a SM165
    Other Motorcycles:
    Honda CB 400 Vtec 3
    Port height have nothing to do with the whole ignitions system

    to my knowledge the motors also spin in the same direction

    I am pretty sure that the SMS ignition is a simple bolt over affair and that's all to it

    at the same time I would also change the carburetor

    Robert-Jan
  8. bashy22 Husqvarna
    A Class

    Yea i have the tmx carb