2 Stroke Husky/KTM Case Modification

Discussion in 'Zip Ty Racing' started by Huskynoobee, Aug 29, 2017.

  1. Huskynoobee CH Sponsor ZipTy Racing

    Location:
    Castaic, CA
    Husqvarna Motorcycle:
    2011 TE449 2006 WR250
    Other Motorcycles:
    HDUltra Classic IT200 YZ250 SV650s
    This is for all Husqvarna/KTM 2 Stroke engine cases up to 300cc. The stock cases are cast aluminium and lack the steel reinforcement inserts that are often found in their 4 Strokes at the swingarm pivot point in the case halves. This omission of this insert, combined with steel frame flex causes the holes through the crankcase to become deformed over time and hard riding by the hardened steel swingarm bolt. This image of a 2016 TE 125 motor shows the stock case lacking the steel sleeve insert.

    Husqvarna-2016-Enduro-TE125-Engine.jpg

    This in turn allows the engine to move and vibrate causing the swingarm bolt to become loose. Which in turn forces the motor mount and swingarm bolts to be over-tightened regularly to reduce vibration. This will eventually cause the frame tabs to become deformed and over time metal fatigue will cause cracks and failure. This is in addition to the damage being done to the case.

    Don't allow this to happen to your 2 Stroke machine! At Zip-Ty Racing, we want you to enjoy the race tricks we use in our race bikes for your own. Our steel insert modification solves the problem! As you can see the case is machined to accept a hardened steel sleeve insert to keep everything strong and square. Another example showing how Ty never allows a problem to slow the team down and solutions lead to results.
    [IMG]

    [IMG]
    gots_a_sol likes this.
  2. Huskynoobee CH Sponsor ZipTy Racing

    Location:
    Castaic, CA
    Husqvarna Motorcycle:
    2011 TE449 2006 WR250
    Other Motorcycles:
    HDUltra Classic IT200 YZ250 SV650s
    The cost for this modification is $150.00. This price is for the sleeve insert mod ONLY. You can send your disassembled case halves to us if you prefer to do the rest of the work yourself. The bearings can be left in the case halves if you like. After the work is complete, they will be run through the hot parts washer to remove any debris.

    If tearing down the motor isn't your thing, then just send the whole motor to us and we will be happy to take care of it. While it's apart, we can refresh the top end, perform any crank or head mods you would like, and get it back to you ready to install and enjoy. Tear down and rebuild services, any other services, parts, seals, bearings, etc. will be charged separately. Call the shop for further details. 760-244-7028
  3. robertaccio Husqvarna
    Pro Class

    Location:
    San Diego, Ca
    Husqvarna Motorcycle:
    2017 TX300
    Other Motorcycles:
    92BetaZero260, 01YamahaYZ125
    Good mod. Like I said my 2001 YZ125 has hardened steel bushings that are interference fitted into the case halves, so the idea is nothing new, but its a solid engineering method.
    Huskynoobee likes this.