Daelim B-Bone 125cc service manual.pdf - Mojo

CYLINDER HEAD / VALVES
● Using a 55 degree cutter, remove the bottom ¼ of the
old seat.
55
● Using a 45 degree cutter, cut the seat to the proper
width.
SEAT WIDTH
45
CONTACT TOO HIGH
● 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.
37
CONTACT TOO LOW
● 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.
55
10-10