Valve Seat Refacing - DAELIM Roadwin R Service Manual

CYLINDER HEAD / VALVES
70
IN : 22mm
EX : 22mm
IN : 24.5mm
EX : 24.5mm
ROUGHNESS OR SCRATCH
10-8
VALVE SEAT VALVE SEAT VALVE SEAT VALVE SEAT VALVE SEAT
VALVE SEAT VALVE SEAT VALVE SEAT VALVE SEAT
VALVE SEAT VALVE SEAT VALVE SEAT VALVE SEAT VALVE SEAT VALVE SEAT
VALVE SEAT VALVE SEAT VALVE SEAT VALVE SEAT VALVE SEAT VALVE SEAT VALVE SEAT
20
IN : 23mm
EX : 20mm
VALVE
SEAT
45
CUT THE SEAT PART
35
Valve faces and stem tips cannot be ground. If a valve
face or stem tip is rough, worn unevenly, or contacts
the seat improperly, the valve must be replaced.
Measure the valve seat width.
STANDARD VALUE : 0.7~0.9 mm
SERVICE LIMIT : 1.3 mm

VALVE SEAT REFACING

Reface the worn valve seat by using valve seat cutters
and grinders.
Follow the refacer manufactuer's operating
instructions.
Be careful not to grind the seat more than necessary.
Using a 45 degree cutter, remove any roughness or
irregularities from the seat.
Reface the valve seat whenever the valve guide has
been replace.
Using a cutter, remove
material.
SERVICE LIMIT : IN : 20 degrce cutter
EX : 30 degrce cutter
of the existing valve seat