Just picked up a 2013 yz250f from one of the race teams . It has the full blown GYT-R motor . MotoTsanari intake . I was told to only run VP T4 in it . 0 hours on the motor when I got it . When trying to break it in it was really hard to start cold 20-25 kicks . The only way I could get it to light was if I had the throttle twisting while kicking . After it was hot it would start 1st kick with the hot start . Played with the jetting a lot seat of the pants style . I have about 10 gallons ran through it now . Now it starts easier when cold 2-5 kicks . When it is hot it will not start again without a few bumps or 100 kicks . Bike has all carb mods done . I know how to kick a 4 stroke (5th 4 stroke) . The bike is magic when running . It does seem to start easier if I lean the pilot jet out but then it cuts out at 1/8 throttle while riding . Valves are spot on . Plug is good , has good spark . Someone help . 188 main , 48pilot , clip in stock position , fuel screw 1 turn out . Idles perfect when warm runs like a beast , WON'T START!!!