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  1. Sprocket lock washer needed?

    Maintenance
    I have just replaced my front sprocket and countershaft seal on my 2013 YFZ450. The replacement seal kit came with a sprocket lock washer (but this kit works for many models and even dirt bikes). Do I need to put the lock washer on? It didn’t come with one stock so I didn’t know if it was meant...
  2. Countershaft seal replacement

    New Member Intros
    When installing a new countershaft seal on a 2013 YFZ 450 does the oil have to be drained?
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