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Honda CRF450RL 2021 Owner's Manual & Off-Road Handbook page 62

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Maintenance
Remove the right radiator mounting bolts [1] and washers
[2].
[1]/[2]
Remove the bolt (long) [1] and bolt (short) [2].
Remove the thermostat housing [3] (with the PAIR check
valve cover, radiator hoses, and ECT sensor connector).
[3]
[2]
Remove the O-ring (large) [1] and O-ring (small) [2].
2-36
[1]/[2]
[1]
[1]
[2]
Remove the right cylinder head hanger bolt [1].
Remove the right cylinder head hanger plate bolts [2] and
right cylinder head hanger plate [3].
[2]
[3]
Loosen the insulator band screw [1] and pull the throttle
body [2] out from the insulator [3].
• Do not let the throttle body hang from the throttle
cable.
[3]
Disconnect the vacuum hose B [1] from the insulator.
Release the fuel tank breather hose B [2] from the clamp
[3].
[3]
[1]
[1]
[2]
[1]
[2]

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