I think your jetting is good for hot dry summers, I have used your setup in Greece with no problems, but for cold weather racing I would go to a N1EF needle on the 2nd or 3rd clip with a #7 slide. The 42 pilot is just right, I have tried the 45 with a #8 slide and it has similar results with the 42 and #8 slide.
I use 178 to 180 main with the F needle with a 2% full synthetic oil mix, and have no issues after long transfer sections @ WOT. Try it, it gives a nice strong mid-range.
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EC250 2008 Skid plate, rad braces, Fork bleeders
Drz 400 Motard '03 (full spec)
Yz 250 '06, KTM exc 250 '05, exc 250 '04, exc 250 '02
WRF250 '02, KDX 220 '98, DT200R '93 all sold
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