Maintenance & Technical > KX250 / KX125

2004 KX 125 Rebuild

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KXDINO:
I would look at the big end closely with a good light and a magnifying glass , any greyness on the bearing and its history actually the parts are not to dear , I would put a new big end in and new main bearings and seals, I have a 08 kx125 since new that I kept and had a few season under it belt , I would put a big end in it than the next time it was due a hole crank as the stuffers start to bugger up , I only used oem on the bottom end , they are reliable but the top ends need constant rebuilds with a fast rider on board no more than 6 hrs and change the ring or else they wear the exhaust bridge I also drill the 2 holes on the piston a fraction bigger to allow better lubrication , seem to help also check clutch bearing and plates in case a fibre has broken had that happen on a kx85, another thing I always new when it was time to do the bottom end on it , it always started to vibrate more, hope that helps.

DP3601:
I am going to go ahead and pull the bottom end apart and refresh the complete thing.  Not knowing how it was cared for from the previous owner(s).  That being said I will go ahead and replace the crank.  I have read nothing but mostly bad reviews on aftermarket cranks.  Anyone have any experience with these.  OEM seems to be the best way to go.

Foxx4Beaver:
that's a good plan...it's always best to rebuild/replace as much as your wallet will allow, as this will help ensure the reliability of it.
I myself, have heard nothing but bad, bad things about Hot Rod cranks...bad...to the point that my local dealer stopped getting them for customers.
OEM is a very good choice, but I'm not sure you'll find a complete crank available, call and ask your Kawie dealer to check and see if they're available first...you might have to get a rod, big end bearing, etc separately, then rebuild your current crank....but if you have to go that route, consider going with Wossner, as they're rods and pistons are actually quite a bit better than OEM and other aftermarket products.
If you decide to go with Wossner, speak up...as there's a couple good members on here that can set you up with what you'll need.

you can check out Wossner here...
http://www.wossnerpistons.com/

good luck, and keep us posted.

DP3601:
I can get a complete OEM crank from the dealer for a cool $255.  The Wossner is a cheaper route to go.  Any suggestions on who can rebuild a crank with this kit and what it will take?

Foxx4Beaver:
check your PM's.

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