Honda Metropolitan CHF50 Service Manual page 107

FUEL SYSTEM
Do not attach the
label to any part
that can be easily
removed from the
vehicle.
Attach the Vehicle Emission Control Information
Update Label on the left side of the rear frame as
shown.
See Service Letter No. 132 for information on
obtaining the label.
NOTICE
Sustained operation at an altitude lower than 1,500
m (5,000 feet) with the carburetor adjusted for high
altitude settings may cause the engine to idle
roughly and stall in traffic. It may also cause engine
damage due to overheating.
When the vehicle is to be operated continuously
below 1,500 m (5,000 feet), readjust the carburetor
as follows.
Warm up the engine to operating temperature. Ride
the scooter for approximately 10 minutes.
Turn the pilot screw out 1/4 turn from the high alti-
tude setting.
Replace the high altitude main jet with the standard
type.
STANDARD ALTITUDE MAIN JET: #72
Adjust the idle speed at low altitude with the throttle
stop screw.
Remove the Vehicle Emission Control Information
Update Label that is attached on the rear frame after
adjusting for low altitude.
STARTING ENRICHMENT (SE) VALVE
The SE valve
resistance
inspection can be
done with the
carburetor in the
engine.
RESISTANCE INSPECTION
Disconnect the SE valve 2P connector.
Measure the resistance between the connector ter-
minals.
STANDARD: 2.8 - 5.2 O. (at 20°C/68°F)
If the resistance is abnormal, replace the SE valve.
PILOT SCREW WRENCH
SE VALVE 2P
CONNECTOR
5-21