System Inspection; Secondary Air Supply System - Honda CBR150R Manual

6. Start the engine and adjust the idle speed with the
throttle stop screw.
TENTATIVE IDLE SPEED: 1,400
7. Turn the pilot screw in or out slowly to obtain the high-
est engine speed.
8. Lightly open the throttle 2 or 3 times, then adjust the
idle speed with the throttle stop screw.
9. Turn the pilot screw in until the engine speed drops by
50 min -1 (rpm)
FINAL OPENING: 3/4 turns out
10. Disconnect the plug from the vacuum port, then
remove the vacuum pump and connect the vacuum
tube of PAIR control valve.
11. Readjust the idle speed with the throttle stop screw.
±
IDLE SPEED: 1,400 100 min

SECONDARY AIR SUPPLY SYSTEM

SYSTEM INSPECTION

Start the engine and warm it up to normal operating
temperature.
Remove the fuel tank (page 5-3).
Check that the secondary air intake port is clean and free
of carbon deposits.
Check the pulse secondary air injection (PAIR) check valves
if the port is carbon fouled.
Disconnect the PAIR control valve vacuum tube from the
cylinder head.
Connect the vacuum pump to the PAIR control valve
vacuum tube.
Start the engine and open the throttle slightly to be cer-
tain that air is sucked in through the air supply hose.
If the air is not drawn in, check the air supply hose for
clogging.
With the engine running, gradually apply vacuum to the
PAIR control vale vacuum tube.
Check that the air supply hose stops drawing air, and that
the vacuum does not bleed.
SPECIFIED VACUUM: 37 kPa (280 mmHg)
If the air is drawn in or if the specified vacuum is not main-
tained, install a new PAIR control valve.
If afterburn occurs on deceleration, even when the sec-
ondary air supply system is normal, check the air cut-off
valve.
±
–1
100 min (rpm)
–1
(rpm)
THROTTLE STOP SCREW
AIR INTAKE PORT
FUEL SYSTEM
PAIR CONTROL VALVE
VACUUM PUMP
5-15