Hi i have an 03 wr450 with a big bore kit in it. It is really hard to start when hot. Usually 4 or more kicks when stalled and 3 or more when shut off. Jefting is 168 main,48 pilot,#5 jd red and 1.5 turns out on the mix screw. It was about 68 degrees out today. It starts fine when cold without the choke which makes me think the idle mix is a little rich but it runs fine on the trail. Should i play with the mix screw and set it a little better or is this normal for an older 4 stroke.