crf250 08 only start with hot start please help

ok i cant start my crf with the choke on at all as in no chance of it firing but if i hold the hot start in it will fire within a few minutes but still hard to start cold, when it is warm it has no problems starting with the hot start in.

i live in north west Australia so its quite hot and about 1700ft above sea level, can anyone help as i dont understand carbs to well and any jetting info would be good to cheers..

oh yeah bike is stock..

Hey man have you checked your valve clearance? with my 450's when the valves close up i could only start them with the hot start pulled on!!!!

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