Honda CB HORNET 160R 2015, Shop Manual

Page: 90 / 336

5-18
FUEL SYSTEM
IDLE DROP PROCEDURE
1. Remove the left side cover (page 2-3)
Turn the pilot screw until it seats lightly, then back it out to
the specification given.
This is an initial setting prior to the final pilot “screw
adjustment. “
INITIAL OPENING: 2 & 1/8 turns out
2. Warm up the engine to normal operating temperature.
3. Stop the engine and connect the tachometer, according
to the manufacturer’s instructions.
4. Disconnect the vacuum hose of PAIR control valve, then
it connect the vacuum pump and plug the vacuum port.
Apply the specified vacuum to the PAIR control valve
vacuum hose more than 53.3 kPa (400 mm Hg) (make
sure the secondary air does not supply).
5. Start the engine and adjust the idle speed with the
throttle stop screw.
IDLE SPEED: 1,400 ± 100 min
-1
(rpm)
6. Turn the pilot screw in or out slowly to obtain the highest
engine speed.
7. Lightly open the throttle 2–3 times, then adjust the idle
speed with the throttle stop screw.
8. Turn the pilot screw in gradually until the engine speed
drops by 100 min
-1 (rpm).
9. Turn the pilot screw outward to final opening.
FINAL OPENING: 1/2 turns out from the position
obtained in step 8
10. Disconnect the plug from the vacuum port, then remove
the vacuum pump and connect the vac uum hose of PAIR
control valve.
11. Readjust the idle speed with the throttle stop screw.
IDLE SPEED: 1,400 ± 100 min
-1
(rpm)
Damage to
the pilot screw
seat will occur
if the screw
is tightened
against the seat.
Reference
engine oil
temperature:
60 o - 65 o C
VACUUM HOSE
VACUUM
PUMP
PLUG
THROTTLE
STOP SCREW
PILOT SCREW