KX125 Jet settings

[Txbigguy]

Ok guys I am in the process of jetting my bike a 98 KX 125 for the first time. What are some of the Jetting specs that you guys would recomend or are currently running. I have a FMF Fatty pipe and power core II silencer on it. I am also thinking about adding a V-Force reed valve as well. :think:

 

[skhasky]

Are you at sea level? If so, your jetting should be somewhere around
42 pilot
158 main
3rd clip on the needle
55 power jet
1 1/2 turns out on the air screw
Start from there and tell us how it runs.

 

[Txbigguy]

I guess Dallas would be close to sea level. Is the number printed on the jet anywhere. I bought my bike used and dont really know what is in it right now.

 

[Senior KX Rider]

The numbers are stamped on them. The ones on the pilot and needle are hard for us old guys to see with out a magnifying glass. :)