30/ENGINE - WORK ON INDIVIDUAL PARTS
125
400375-10
–
Check the sealing area of the cylinder for distortion using a straight edge and the
special tool.
Feeler gauge (59029041100) (
Cylinder/cylinder head - sealing area
distortion
≤
0.10 mm (
≤
0.0039 in)
» If the measured value does not equal the specified value:
–
Change the cylinder head.
0
0
A
A
400373-10
–
Check sealing seat
of the valves.
Valve - sealing seat width
Intake
1.60 mm (0.063 in)
Valve - sealing seat width
Exhaust
2.00 mm (0.0787 in)
» If the measured value does not equal the specified value:
–
Machine the valve seat.
–
Blow compressed air through all oil holes and check that they are clear.
19.27
Installing valves
0
0
1
1
0
0
0
0
2
2
0
0
3
3
0
0
5
5
0
0
4
4
300118-01
–
Position the valve spring cap
. Install new valve stem seals
.
–
Install the valves
according to their normal built-in position.
–
Install the valve springs
and the spring retainers.
300116-11
–
Pretension the valve springs using the special tool.
Valve spring compressor (59029019000) (
Valve spring mounting device (78029060000) (
300115-11
–
Mount valve keys.
Info
When mounting the valve keys, check that they are seated correctly; prefer-
ably, fix the valve keys to the valve with a little grease.
–
Place shims
into the valve spring retainers according to the installation position.