Our new 07 yz250f (3hours old) ,the manual says we shouldn't need to twist the throttle or use the hot start with the warm bike ... I found my son has to give it a little gas to start it when warm .. cold starts are very hard... One thing, he has ridden 2strokes and this is our first thumper could we be kicking it wrong.Do these bike need a kick dance to get them going. or a certain set of movements to start. Lastly would i need to turn up the fuel screw a little for a easier start. BTW we took it to the track today and he jumped everything easier than on his cr125. with full gear..