2007-2009 Honda TRX300EX TRX300X service manual, Page 320Get this manual
IGNITION SYSTEM
REMOVALINSTALLATION
Remove the top cover (page 2-4)Remove he ICM from the staysDisconnect the ICM 4P (Natural) and 2P (Natural) connectors to remove the ICMInstallation is in the reverse order of removal
IGNITION TIMING
Start the engine and warm it up to operating tem- peratureStop the engine and remove the iming hole cap from the left crankcase cover
Read the manufacturer's instructions for timing light and tachometer operation