2004-2009 Honda TRX450R/TRX450ER Service Manual, Page 105Get this manual
LUBRICATION SYSTEM ('04'05)
OIL PUMP
INSPECTION
Separate the crankcase (page 15-11)Measure the rotor tip clearanceSERVICE LIMIT: 0.20 mm (0.008 in)
Measure the pump body clearanceSTANDARD: 0.150.21 mm (0.0060.008 in)