Hey Krannie I see a lot of guys using ® and (s) diameter needles could not find any succes with these leaner needles
With more than 12 months on and off playing with the jetting changing pilot air jets ,mains pilots you name it ,Ihave come up with a great combo which might help you out.
75 pilot air
NFPR needle 4 th clip (YZ 250 F NEEDLE)
Coaster enrichner valve intacked and working
Tan colour spark plug
14 kms to the lite
The (P) L1 is the same as the JD needle
What year yz250f is that NFPN from?
Edited by Krannie, June 25, 2013 - 04:32 PM.