Honda Metropolitan CHF50 User Manual

CYLINDER HEAD/VALVES
Inspect the valve seat face for:
• Damaged face:
- Replace the valve and reface the valve seat
• Uneven seat width:
- Bent or collapsed valve stem; Replace the
valve and reface the valve seat
Contact area (too low or too high area):
- Reface the valve seat
DAMAGED FACE
7
UNEVEN SEAT WIDTH
TOO LOW
TOO HIGH
VALVE SEAT REFACING
NOTE:
• Follow the refacing manufacturer's operating
instructions.
• Be careful not to grind the seat more than neces-
sary.
If the contact area is too high on the valve, the seat
must be lowered using a 32° flat cutter.
If the contact area is too low on the valve, the seat
must be raised using a 60° interior cutter.
Refinish the seat to specifications, using a 45° finish
cutter.
\
/
/
\
32
°
/\45°
V
1 1/ \ 60°
W \
CONTACT TOO HIGH
CONTACT TOO LOW
\ OLD SEAT WIDTH
•"^ Y^v.
32
°
OLD SEAT WIDTH
7\60°
8-15

Honda Metropolitan CHF50 Specifications

General

Engine Type	49cc liquid-cooled single-cylinder four-stroke
Ignition	CDI
Transmission	Automatic V-Matic belt drive
Rear Suspension	Single shock
Front Brake	Drum
Rear Brake	Drum
Front Tire	80/100-10
Rear Tire	80/100-10
Seat Height	28.3 inches
Fuel Capacity	1.3 gallons
Bore x Stroke	37.8mm x 44.0mm
Compression Ratio	12.0:1
Starter	Electric
Curb Weight	179 pounds