42
125
-
160 cc
C
WORKSHOP MANUAL
CYLINDER HEAD, VALVES, CYLINDER, PISTON
Checking and adjusting valve seating
Inspection
Clean carbon deposits from valve.
Check for possible cracks or distortion of valve seat.
Change
NOTE Valves cannot be repaired.
In the presence of breakages, damage, or areas that do not
seal correctly, renew the valves.
Remove the valves; check valve seating surface with petrol.
Grind valve seat to remove any abrasions.
If the valve is not perfectly straight, check clearance between valve guide
and valve stem; if clearance is incorrect, renew valve guide.
A
Valve seat damaged
B
Valve bent
A
B
07028137
07028138
