2006-2012 Honda TRX90 TRX90EX/X Service Manual, Page 75Get this manual
FUEL SYSTEM
CARBURETOR ASSEMBL V
FLOAT VALVE FLOAT AIR SCREW
THROTTlE
CLIP JET NEEDLE THROTTLE STOP SCREW
CARBURETOR BODY CLEANING
Blow open each air and fuel passage in the carburetor body with compressed air
Install the following: Throttle stop screwspring Slow jet Needle jet Needle jet holder Main jet