Honda 2010 CBF 250, Workshop Manual

Page: 108 / 291

CYLINDER HEAD/VALVES
CBX250
It recommends the use of strawberries / rectifiers spe-
cific to valve seats, for the correction of seats worn.
The Rectification of the seat of the valve with a
strawberry 45° always to replace the guide. In the
event that the surface of contact is too high, use a
strawberry flat 32TH to lower the seat. In the event
that the surface of contact is too low, use a strawberry
internal 60TH to raise the seat. Using a strawberry
finished 45TH rectification of the seat of agreement
with the specifications. Using a strawberry 45° remove
any roughness or irregularities of the seat of the valve.
Special tool:
Strawberry seat of valves,
27,5 mm (45º ADM)
07780–0010200
Strawberry seat of valves,
24 mm (45º ESC)
07780–0010600
Support for strawberry, 4,5 mm 07781–0010600
Using a strawberry flat 32 degrees remove 1/4 of
existing material in the seat of the valve.
Special tool:
Fresa plana, 27 mm (32º ADM)
07780–0013300
Fresa plana, 24 mm (32º ESC) 07780–1250000
Soporte de fresa, 4,5 mm 07781–0010600
Using a strawberry internal 60° remove 1/4 of existing
material in the seat of the valve.
Special tool:
Fresa interna, 37,5 mm (60º ADM)
07780–0014100
Fresa interna, 26 mm (60º ESC) 07780–0014500
Soporte de fresa, 4,5 mm 07781–0010600
CONTACT SURFACE TOO
HIGH
Previous
WIDTH OF
THE SEAT
CONTACT
SURFACE TOO
LOW Previous
WIDTH OF
THE SEAT
RIDGED
32°
60°
32°
60°
Previous WIDTH
OF THE SEAT
Previous WIDTH
OF THE SEAT