crank rebuild; 08 yz450f

1 reply to this topic
  • 08YZ450Rider

Posted August 22, 2010 - 06:02 PM


(back ground: my crank is being rebuilt right now and will be back next weekend from WMR in stuart)
I need your guys wisdom and experience. My freinds and I have 2-wheel tuesdays every week to be back yard mechanics. and while we are very good at details, and religiously following the shop manual; can anyone advise me as far as things that may help us when we are putting it back together? we have the tools; weve all done lots of 2-stroke rebuilds, but only 1 450 4-stroke, which is still in progress.

are there any common mistakes when putting these 450 motor's back together?

Thanks for your help.

Central FL

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  • rubbersdown

Posted August 22, 2010 - 08:03 PM


As far as the crank it pretty much will go in just like any other biike. I recommend the freezer trick, it works quite well. The biggest thing you can do while putting a 4 stroke back together is TRIPLE CHECK the timing!!! set the timing, then put the tensioner back in, then cycle it and check it 2 more times! and also, if your putting in a new crank go ahead and replace the timing chain also, its best $25 you will ever spend for preventative maintenance.

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