2004-2009 Honda TRX450R/TRX450ER Service Manual, Page 467Get this manual
22IGNITION SYSTEM (After '05)
COMPONENT LOCATION SYSTEM DIAGRAM SERVICE INFORMATION TROUBLESHOOTING IGNITION SYSTEM INSPECTION
22-2 22-2 22-3 22-4 22-6
IGNITION TIMING IGNITION COIL ICM (IGNITION CONTROL MODULE) THROTTLE POSITION SENSOR