1988-1994 Honda TRX300 Fourtrax, 1988, 1990-1994 TRX300FW Fourtrax Service Manual, Page 216Get this manual
DISASSEMBLY (TRX300FW)
Remove the following:front wheel (page 11-7)- cotter pin- axle nut- brake drum
Measure the brake drum I.D
SERVICE LIMIT: 161 mm (6.3 in)
- wheel hub and O-ring by removing the hub bolts- dust sealFor front brake waterproof seal inspectionreplacement, see page 12-14