2006-2012 Honda TRX90 TRX90EX/X Service Manual, Page 161Get this manual
ALTERNATORSTARTER CLUTCHCAM CHAIN TENSIONER
FLYWHEELSTARTER CLUTCH
REMOVAL
Remove the left crankcase cover (page 10-4)Hold the flywheel using the flywheel holder, then loosen the flywheel nutTOOL: Flywheel holder
on25-0040000 or equivalent commercially available in U.S.A