Honda TRX450R Service Manual page 80

MAINTENANCE
Remove the two bolts and oil filter cover.
Remove the oil filter and spring.
Apply engine oil to the drain bolt threads.
Install the engine oil drain bolt with a new sealing
washer and tighten it.
'04 - '05: TORQUE: 22 N m (2.2 kgf-m, 16 Ibfft)
After '05: TORQUE: 25 N-m (2.5 kgf m, 18 Ibfft)
Apply grease to the filter side of the spring end.
Install the spring into a new oil filter.
OIL FILTER
SEALING WASHER
ENGINE OIL DRAIN BOLT
4-16