Pilot Screw Adjustment - Honda C8R600F4 Service Manual

PILOT SCREW ADJUSTMENT
IDLE DROP PROCEDURE
NOTE:
• Make sure the carburetor synchronization is with-
in specification before pilot screw adjustment.
•The pilot screws are factory pre-set and no adjust-
ment is necessary unless the pilot screws are re-
placed.
• Use a tachometer with graduations of 50 rpm or
smaller that will accurately indicate a 50 rpm
change.
1. Raise the fuel tank and support it (page 2-3).
Turn each pilot screw clockwise until it seats light-
ly. then back it out to the specification Qiven. This
is an initial setting prior to the final pilot screw
adjustment.
CAUTION:
Damage to the pilot screw seat will occur if the
pilot screw is tightened against the seat.
TOOL:
Pilot screw wrench
INITIAL OPENING:
07KMA-MN90100 or
07KMA-MS60101
49 state/Canada type: 3-1/8 turns out
California type: 2-3/8 turns out
2. Warm up the engine to operating temperature.
Stop and go driving for 10 minutes is sufficient.
3. Stop the engine and connect a tachometer ac-
cording to the tachometer manufacturer's instruc-
tions.
4. Start the engine and adjust the idle speed with
the throttle stop screw.
IDLE SPEED:
49 state/Canada type: 1,300
±
100 rpm
California type: 1,400
±
100 rpm
5. Turn the No. 4 carburetor pilot screw in or out
olowly to obtain the highest engine speed.
6. Perform step 5 for all carburetor pilot screws.
7. Lightly open the throttle 2 or 3 times, then adjust
the idle speed with the throttle stop screw.
8. Turn the No. 4 carburetor pilot screw in until the
engine speed drops by 50 rpm.
9. Turn the No. 4 carburetor pilot screw out to the
final opening from the position obtained in step 8.
FINAL OPENING:
49 state/Canada type: 3/4 turns out
California type: 1 turns out
10.Adjust the idle speed with the throttle stop screw.
11.Perform steps 8, 9 and 10 for all carburetor pilot
screws.
FUEL SYSTEM
PILOT SCREW WRENCH
5-33