does anyone know what the jetting should be on a kdx 250 sr.Its a friends bike running a 33mm pwk,having recently melted a piston hes decided to check out wot he should have!!!!!!! :clue: :clue: :clue:
Is the problem solved?
If not try this: main 160, pilot 40 and do plug reading.
Important: at first find the correct main size and after this play with the pilot and the needle.
You can find the steps on justkdx.