I remember when i 1st started riding big Yamaha 4 strokes and how hard they were to start...until i learned 1 thing...NEVER touch the gas when starting them. At least none of the 426's or 450's ive ridden. That doesn't apply to my '09 yz450f. Before my first ride at the track I always twist the throttle to the stop 3 times before kicking. Makes starting it cold much easier. I wouldn't think that would be a good idea when the bike is hot/warm, but works like a charm when it's cold.