DAELIM HISTORY 125 - SERVICE, Service Manual

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●
Using a 55 degree cutter, remove the bottom
¼
of the
old seat.
●
Using a 45 degree cutter, cut the seat to the proper
width.
●
If the contact area is too high on the valve, the seat
must be lowered using a 37 degree flat cutter.
Refinish the seat to specifications, using a 45 degree
finish cutter.
●
If the contact area is too low on the valve, the seat must
be raised using a 55 degree inner cutter.
Refinish the seat to specifications, using a 45 degree
finish cutter.
9-10
CYLINDER HEAD / VALVES
55°
45°
SEAT WIDTH
37°
CONTACT TOO HIGH
OLD SEAT
WIDTH
55°
CONTACT TOO LOW
OLD SEAT
WIDTH