Baja WD250U Service Manual page 164

The contacting part [B] is in the middle of valve
face. But the width is too narrow
Reamer assy of valve rale
USE Reamer 45˚
The contacting part [C] is too narrow, and on
the upper edge of valve face
Reamer assy of valve rale
Reamer 35˚
USE
Reamer 45˚
[D] The contacting part is too narrow and on
bottom of valve.
Reamer assy of valve rale
USE
Use reamer of 60˚ first Make the contracting part in
˚
Reamer of 45
5) Grind
• Valve face
• Valve race
CAUTION:
Should grind the valve face and valve race after
correcting the valve race or replacing valve and
valve guide pipe.
Grinding procedure of valve face
• Paint a layer of grinding powder (1)
CAUTION:
Ensure no grinding powder enters the clearance
between the valve and valve guage.
163
Result
Get unified contacting width
1.0mm (0.04in)
Result
Make the contacting part in
middle and get the
contacting width 1.0mm
(0.04in)
Result
the middle and increase the
width