Yamaha 2003 YZ450FR Owner's Service Manual page 16

CHAPTER 6
ELECTRICAL
ELECTRICAL COMPONENTS
AND WIRING DIAGRAM .......................... 6-1
MAP-CONTROLLED CDI UNIT ................ 6-2
IGNITION SYSTEM ................................... 6-3
TPS (THROTTLE POSITION SENSOR)
SYSTEM .................................................... 6-7
CHAPTER 7
TUNING
ENGINE ..................................................... 7-1
CHASSIS ................................................. 7-10