I have recently moved to an '09 YZ450F and installed a Rekluse Core EXP 2.0 and set the bike up for hare scrambles. I've had the bike for about 2 months and really like the bike. Up until this weekend I've had no issues with stalling and the Rekluse has been working great. Now for the question, I raced a hare scramble in north Texas this weekend, the conditions were elevation approximately 900', temp was 100F (crazy I know), dry and dusty. The bike flamed out / stalled multiple times at low speeds, usually when making a quick transition from blipping the throttle to slamming on the rear brake. I'm thinking this is a jetting issue and not a Rekluse issue. The motor and exhaust are completely stock; my current jetting is 45 pilot, stock needle on the 3rd clip, 160 main, and fuel screw 3 turns out. Is this a problem that can be fixed by turning the fuel screw in (and maybe the idle up), or should I try a 42 pilot for the extreme heat? One final question; any recommendations for jetting in Colorado (Taylor Park) in July?