1988-1994 Honda TRX300 Fourtrax, 1988, 1990-1994 TRX300FW Fourtrax Service Manual, Page 220Get this manual
BRAKES TRX300FW Remove the wheel hub from the brake drum 'and temporarily install the hub on the axle shaftTighten the axle nut securelyInstall suitable steel plate to the wheel hub and tighten the plate with the wheel nut securelyClean off any grease from the brake panelTRX300FW
Grease on the brake linings reduces stopping powerKeep grease off the liningsMeasure the brake panel on the points attached to the waterproof seal lip for warpage as shown, using dial indicatorSERVICE LIMIT: 0.4 mm (0.02 in) Replace the brake panel if warpage is greater than the service limit
FRONT BRAKE WATERPROOF SEAL INSPECTION
Check the waterproof seal for damage, fatigue or faulty installationMeasure the front brake waterproof seal lip lengthSERVICE LIMIT: TRX300: 19.0 mm (0.75 in) TRX300FW: 20.0 mm (0.79 in)