2004 John Deer Buck Utility ATV 500, 500EX and 500EXT Service Manual, Page 64Get this manual
Calibration Main Jet Needle Jet Pilot Jet Pilot Screw Idle RPM (100)
Sea Level 140 O-8 35 1100
1200 (4000 ft) 135 O-6 32.5 1100
2400 (8000 ft) 135 O-6 32.5 1100