Rectifying The Seat Of The Valve - Honda 2010 CBX 250 Workshop Manual

CYLINDER HEAD/VALVES
Remove the valve and inspect the surface of your seat.
The surface of the seat of the valve must be in agreement com
the width specified and uniform in all its circumference.
i
The valves may not be rectified. If a valve is burned or
excessively worn down, or presents unequal contact
with the seat, replace it.
Inspect the surface of the valve with regard to:
• Wide unequal in the seat: stem from the valve leaf or
replace damaged the valve and rectify the seat.
• Contact Area of the valve damaged: Replace the valve
and rectify the seat.
• Contact Surface (too high or too low): the Rectification of
the seat of the valve.
Inspect the width of the seat of each valve.
The surface of the seat of the valve must be in agreement with
the width specified and uniform in all its circumference.
Value
1,0 – 1,2 mm
In the event that the width of the seat of the valve is not in
agreement with the specification, or this rebated, rectify
(page 7-16).

RECTIFYING THE SEAT OF THE valve

NOTE
•Follow the instructions of operation equipment man-
ufacturer rectifier.
•Be careful not to rectify the seat more than was
necessary.
7-14
Service Limit
2,0 mm
SURFACE DAMAGED
CONTACT SURFACE TOO
LOW
WIDTH OF THE CONTACT
SURFACE OF THE SEAT
OF THE valve
32°
CBX250
WIDE OR UNEQUAL
IN THE SEA
CONTACT SURFACE TOO
HIGH
45°
60°