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'06 yz125--new top end?

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I bought this bike new about 1 1/2 years ago. I ride mostly trails and have never raced it--although I do ride it hard. I believe the manual says to do the top end after about 20 hours or so. I've never done this. It seems to run fine and still has good power, but I don't wan't to ruin anything. I've never owned a 2t before and am unfamiliar with the rebuild process.

Called a few dealerships and they want around $600 to do a top end. I thought they were around $150.

I guess my question is: Do I need to do a top end? And if so, what needs to be done or how involved is it?

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To answer your queston, YES you need a new top end if you've logged about 40 trail hours on the bike in the last 18 months and as far as what to buy and how to do it - do what Buck said. :p

You were right. The $150 price you heard earlier was to buy one and do it yourself.

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