pressure

Planning on a Race for Real at Sydney Dragway (to race my nephew) Thinking it might be useful to run a lower rear tire pressure? Also jack up the rear preload? Any suggestions?

So I got a 95 KLX 650 in for carb work. It would run then die. I got it running but it seems to be overfueling at idle. Fuel screw all the way in (tried all the way out to 3.5 turns) Cleaned all jets, replaced pilot with brand new #40 (stock) Needle and seat hold pressure Slide opens with...