Honda CRF450R 2009 Owner's Manual & Competition Handbook page 78

Valve Clearance
3. Check that the rubber seals (4) are in good
condition, replace them if necessary.
Install the rubber seals onto the cylinder head
cover with the "UP" marks (5) facing up.
(4)
(5)
(4) rubber seal
(5) "UP" marks
4. Install and tighten the cylinder head cover
socket bolts (6) to the specified torqie:
7 lbf·ft (10 N·m, 1.0 kgf·m)
(6)
(6) cylinder head cover socket bolts
72
Servicing Your Honda
5. Connect the spark plug cap (7) and breather
tube (8).
(7)
(5)
(7) spark plug cap
(8) breather tube
6. Install the fuel tank and seat (pages 33, 35).
(8)