Honda TRX420FPM Owner's Manual page 113

Maintenance Component Locations
spark plug
clutch
engine oil fill cap/dipstick
engine oil drain bolt
owner's manual
air pressure gauge
gear case oil fill cap
gear case oil drain bolt
battery
fuse box
main fuse
PS fuse (TRX420FPM only)
spark arrester
rear suspension spring
pre-load adjuster
(Except TRX420TM)
Servicing Your Honda
tool kit
105