piston burned and sleeve cracked

[kx250.1698]

But why was the cylinder dry but exhaust black of oil?175 ml 2 stroke on 6 liters

[KXcam22]

What oil are you using.  Your ratio is 34:1 which is very rich compared to what I run.  If the bike only ran a short while, the dry/oily look may not be a true indicator.  It is very possible to have the timing very far advanced (by mistake) during a rebuild.  The engine will only run for minutes before it melts.  I did that once and the piston melted in 3 minutes. We need some pics and more info to really help you. Cam.

[kx250.1698]

oke, i will trai to get tomorrow pics

[gowen]

oke, i will trai to get tomorrow pics

Try to get pictures of the side of the motor without the flywheel on so we can see how the stator was set up.

[kx250.1698]

Hi guys will add tomorow pics, my carb was jet ti a 250 main jet and 60 pilot is that wright?? kawasaki says that it must be 172main 55 pilot but wont start with that jets?