Honda CRF450R Owner's Manual page 66

5. CARBURETOR ADJUSTMENT
14. Remove the carburetor top bolts and carburetor top.
(1) CARBURETOR TOP BOLTS
(2) CARBURETOR TOP
15. Remove the jet needle holder and jet needle from
the throttle valve.
(1) JET NEEDLE HOLDER
(2) JET NEEDLE
(3) THROTTLE VALVE
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16. Remove the link arm set screw.
When installing the link arm set screw, apply a lock-
ing agent to the link arm set screw threads.
17. Remove the throttle valve, throttle valve roller and
floating valve.
(1) LINK ARM SET SCREW
(2) THROTTLE VALVE
(3) THROTTLE VALVE ROLLER
(4) FLOATING VALVE
When installing the floating valve onto the throttle
valve make sure the floating valve's flat side faces
out and the hole faces down.
(1) FLOATING VALVE
(2) THROTTLE VALVE
(3) HOLE