Honda CB160 Shop Manual page 90

86
Fig. 5. 21 Contact point cam
Fig.
5.
22 Using sandpaper
POINT FAIL
OIL STONE
Fig.
5.
23 Pointed file and oilstone
fig.
5. 24
Correction by oilstone
5. ELECTRICAL PARTS
(NOTE)
I • The smoothness of the point surface diminishes
with prolonged use (especially when the surface is
oil stained) ; when this occurs the surface becomes
black and abnomal wear exists.
2. If oil adhering to the surface is not removed, oil
fllm on the point surface is produced due to oil
hardening and spark capabilities are obstructed.
Periodic inspection and maintenancP. shoud be per-
formed.
3. Correction of point surface
(a) In case of minor roughness
• Correct by grinding with a fine file or sandpaper.
(bl In case of severe roughness
Remove the breaker arm from the breaker point
base and correct by polishing both contact sur-
faces with an oilstone.
When taking corrective action insure that un-
balanced wear or insufficient contact is not
caused. After installation, balance adjustment
is obtained by matching them at the center of
the contact surface.
• Insufficient contact of the contact point causes
resistance loss and has influence on normal
operation of the engine, as well as the breaker.
Hence, the center aligning and breaker balance
adjustment should be performed.