Honda CRF450R 2011 Owner's Manual page 91

Piston/Piston Rings/Piston Pin
14. Remove the shock absorber upper nut (10) and
bolt (11).
(10)
(11)
(10) shock absorber upper nut
(11) bolt
15. Loosen the insulator band screw (12) and pull
the throttle body (13) out from the insulator
(14).
Do not hang the throttle body and support it with a
suitable strap.
(14)
(12) insulator band screw
(13) throttle body
(14) insulator
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Servicing Your Honda
16. Remove the cylinder head hanger bolts (15).
Remove the cylinder head hanger plate bolts
(16), left cylinder head hanger plate (17) and
right cylinder head hanger plate (18).
(16)
(18)
(13)
(15)
(15) cylinder head hanger bolts
(16) cylinder head hanger plate bolts
(17) left cylinder head hanger plate
(12) (18) right cylinder head hanger plate
(17)
(15)
(16)
17. Remove the cylinder bolt (19).
18. Remove the cylinder head bolts, washers (20)
and the cylinder head (21).
Loosen the bolts in a criss-cross pattern in two or
three steps.
NOTICE
Do not let the washers and cam chain fall into the
crankcase.
(19)
(21)
(19) cylinder bolt
(20) cylinder head bolts and washers
(21) cylinder head
(20)