Pilot Screw Adjustment - Honda VTR1000F 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
adjustment is necessary unless the pilot screws
are replaced.
• Use a tachometer with graduations of 50 rpm or
smaller that will accurately indicate a 50 rpm
change.
1. Turn each pilot screw clockwise until it seats light-
ly, then back it out to the specification given. This
is an initial setting prior to the final pilot screw
adjustment.
CAUTION:
Damage to the pilot screw seat will occur if the pi-
lot screw is tightened against the seat.
TOOL:
Pilot screw wrench 07908-4220201
INITIAL OPENING: 2 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: 1,200
±
100 min-
1
(rpm)
5. Turn the front carburetor pilot screw in or out
slowly to obtain the highest engine speed.
6. Perform step 5 for rear carburetor pilot
screw~
7. Lightly open the throttle 2 or 3 times, then adjust
the idle speed with the throttle stop screw.
8. Turn the front carburetor pilot screw in until the
engine speed drops by 50 min-
1
(rpm).
9. Turn the front carburetor pilot screw out to the
final opening from the position obtained in step 8.
FINAL OPENING:
Front: 1 tu rn out
Rear: 1-1/4 turns out
1 O.Adjust the idle speed with the throttle stop screw.
11.Perform steps 8, 9 and 10 for the rear carburetor
pilot screw.
VTR1000F
(1)
ADDENDUM
24-25