2010 KTM 250sx jetting for FMX
Top factory supported Fmx riders recomend :
Needle : N1EJ
Clip possition : middle
Main jet : 155 summer temp / 158 winter temp
Pilot jet : 40
Slide : stock
Plug : stock
Fuel mix ratio : 50:1 - 60:1
Sprockets: 13f and 49r
Hope this helps someone and remember to still check your plug
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