crank and top end issues

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skillshot73
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crank and top end issues

Post by skillshot73 »

Hey I'm new to the kdx! Its been a while since I had a bike in general but I traded for this thinkin it needed rings. And since the power valves were in the exhaust i knew there would be more. First time taking engine out but I think I did good. Now for the questions, it won't kick, although it did a few times when I got it, it stopped after a few tries. And taking it apart (jugs off) I found metal shavings/chunks everywhere and there is one that looks like it stopped the crank. I don't think it ran like that, just kicked. Cylinder got a few grooves but isn't terrible. is it worth the time? Or is the crank screwed? I'm a newbie and don't know how to take the cranks out. And idk what to check for
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Julien D
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Re: crank and top end issues

Post by Julien D »

Sounds like you need a full rebuild. Splitting the cases to get the crank out isn't to difficult. There's a nice how-to stickied above. At worse case you're looking at a rebuilt crank, re-plated cylinder, new main bearings, and new piston/rings. Pics and such would help diagnose and assist.

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skillshot73
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Re: crank and top end issues

Post by skillshot73 »

Thanks! I got the chunk out of the crank and it turns freely so I think I'm good there! Couldn't get any good pics but i have a buddy comin to give me his opinion. Any idea on a good place to get power valves?
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adam728
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Re: crank and top end issues

Post by adam728 »

If there are metal shavings everywherw then its teardown time. Run it as is and you likely wont go far, amd have even more damage to undo.

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skillshot73
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Re: crank and top end issues

Post by skillshot73 »

I was told i could run gasoline through it to clean out, the shavings are from the power valves, everything but the piston looks ok.. still should teardown just o be sure? Crank and such?
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