2003 YZ450 Crank, re-assembly tips

5 replies to this topic
  • Garrett Canada

Posted August 25, 2016 - 06:55 PM


Hey, I am replacing my crank bearings in my 2003 YZ450 for my first time, is there any tips someone with more knowledge has for me? Anything to look out for when splitting the case? i have the engine torn down to just the bottom end, i have not split it yet, i have my manual however i dont want to tear into it and act like i know what im doing and cost myself more money than i already have, i have a new gasket kit, and crank bearings, and putting it back together, anything i should look out for? or some steps to do it the right way, i dont want to pay a shop to do it because im funding it not my parents and i have all the ingredients to do it myself, i have all the right tools, just not as much knowledge, any tips help! thanks for looking  :)


  • grayracer513

Posted August 26, 2016 - 11:54 AM


Got a manual?





  • Garrett Canada

Posted August 26, 2016 - 07:16 PM


Yes bought a service manual when i bought all my parts

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  • lordhelemt

Posted August 28, 2016 - 03:27 PM


I just did this on a KX65. Just make sure you remember to install the crankcase breather before you press the case back together.

  • Krannie McKranface

Posted August 28, 2016 - 03:43 PM


Make sure all oil passages are free and clear before putting the cases together

  • grayracer513

Posted August 29, 2016 - 06:04 AM


I just did this on a KX65. Just make sure you remember to install the crankcase breather before you press the case back together.


There isn't one in/on the crankcase of a YZ450.

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