1999-2002 TRX400EX Fourtrax Service Manual, Page 233Get this manual

IGNITION SYSTEM
IGN ITION COIL
REPLACEMENT
Removethe left side cover (page2-3)Disconnectthe primary coil connectorRemovethe spark plug cap from the plugRemovethe two bolts, ground wire terminals and the ignition coil from the frameInstall new ignition coil in the reverse order of removal
IGNITION CONTROL MODULE (ICM)

• ATV
• Jet Ski
• Outboard Motors
• Personal Watercraft
• Snowmobiles
• Stern Drives