ATV 200 Service Manual page 165

The contacting part B is the middle of valve
face. But the width is too narrow
Reamer assy of valve race
Get unified contacting width
Use
Reamer 45¡ã
The contacting part C is too narrow, and on
the upper edge of valve face
Reamer assy of valve race
Make the contacting part in
Reamer 35¡ã
the middle and get the con-
Use
Reamer 45¡ã
tacting width 1.0mm(0.04in)
D The contacting part is too narrow and on
the bottom of valve.
Reamer assy of valve race
Use reamer of 30¡ã
Make the contacting part in
firstly
Use
Reamer of 45¡ã
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
Caution
Ensure no grinding power entering the clear-
ance between the valve and valve guide pipe.
Result
1.0mm(0.04 in)
Result
Result
the middle and increase
the width
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