Honda CRF450R Owner's Manual page 70

5. CARBURETOR ADJUSTMENT
13. Rotate the carburetor and align the lug on the car-
buretor with the slot on the intake tube.
(1) SLOT (2) LUG
14. Tighten the connecting and intake tube band screws.
15. Connect the fuel line.
16. If you've determined that the jet needle or clip posi-
tion of jet needle must be changed, you must re-
move the carburetor top.
17. Remove the fuel tank (page 17).
68
18. Remove the carburetor top bolts and carburetor top.
(1) CARBURETOR TOP BOLTS
(2) CARBURETOR TOP
19. Remove the jet needle holder and jet needle from
the throttle valve.
(1) JET NEEDLE HOLDER
(2) JET NEEDLE
(3) THROTTLE VALVE
20. Change the clip position of jet needle or jet needle
as required.
21. Reinstall the jet needle, jet needle holder carbure-
tor top and carburetor top bolts.
22. Install the fuel tank (page 18).
23. Start the engine.
If the engine idle speed is too high or too low or
engine is not idling, adjust the engine idle speed
(page 26).
24. Repeat steps 4 through 23 until the engine gives
maximum power with the correct spark plug read-
ing. It is always better to jet a little rich than a little
lean. It is advisable to record the settings, course
conditions, lap times, and climatic and barometric
conditions for future reference.