I have searched and not found a thread specifically to this topic. I have a 1999 KDX220. When I ride, after about 45 minutes when the big is really warm, the bike stalls frequently. If I hit the brakes hard, pull in the clutch going downhill, let it idle going downhill, etc., it dies. If I keep my hand cranked on the throttle, it won't die, but if I back off it, it dies. Otherwise, it tends to idle fine and it only does it after riding for a while and the engine is hot. What causes this? Do I need different jets, reeds, etc.? Help!! Thx