2006-2012 Honda TRX90 TRX90EX/X Service Manual, Page 25Get this manual
GENERAL INFORMATION CRANKCASE EMISSION CONTROL SYSTEM The engine is equipped with closed crankcase system to prevent discharging crankcase emissions into the atmosphereBlow-by gas is returned to the combustion chamber through the air cleaner and carburetor
AIR CLEANER HOUSING
AIR CLEANER CONNECTING HOSE
Fresh air
Blow-by gas