by Asmith » Fri Jan 26, 2007 2:53 pm
The 07 has very little differences over the 06 on the 250X.
The stock jetting is:
NLBU #2, 132 mj, 42 pj, 55 leak, 2 1/4 fs
We ride similar elevations 1500'-4000' regularly and up to 8000+ on occasion.
Do the CCC mods.
1) cut the airbox
2) remove back fire screen and stock air filter.
3) install Twin Air Powerflow flame retandant filter.
4) install CRF's Only fuel screw.
5) install JD jetting kit set up as recommended ( red needle 5th clip, 158 Main jet ).
6) do the AP mod with the O-ring.
7) install White bros or Applied smog block off kit OR do the JB weld trick and leave the AIS in place (for the Rangers).
8 ) remove baffle from exhaust, cut discs off, drill 1/2" hole and reinstall.
adjust the fuel screw out 1 3/4 to 2 1/4 to eliminate decel pop