2004-2009 Honda TRX450R/TRX450ER Service Manual, Page 505Get this manual

LIGHTSSWITCHES (After '05)
NEUTRAL SWITCHES (TRX450ER only)
INSPECTION
Remove the bolt and gearshift pedal
Disconnect neutral switch connectorCheck for continuity between the switch terminal and engine ground

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