30/ENGINE - WORK ON THE INDIVIDUAL PARTS
144
20.22
Checking the valve springs
305015-10
–
Check the valve springs for breakage and wear (visual check).
» If the valve spring is broken or worn:
–
Change the valve spring.
–
Measure the length of the valve springs.
Valve spring
Minimum length
41.10 mm (1.6181 in)
» If the measured value does not meet specifications:
–
Change the valve springs.
20.23
Checking the valve spring seat
305014-10
–
Check the valve spring seat for breakage and wear (visual check).
» If the valve spring seat is broken or worn:
–
Change the valve spring seat.
–
Measure the thickness of the valve spring seat.
Valve spring seat - thickness
0.90… 1.10 mm (0.0354…
0.0433 in)
» If the measured value does not meet specifications:
–
Change the valve spring seat.
20.24
Checking the cam levers
302718-10
–
Check the cam levers and cam lever shafts for damage and wear.
» If there is damage or wear:
–
Change the cam levers and/or cam lever shafts.
20.25
Checking the cylinder head
302805-10
–
Check valve guides
1
using the special tool.
Limit plug gauge (77229026000) (
» If the special tool is easy to insert in the valve guide:
–
Change the valve guide and valve.
–
Check the sealing area of the spark plug thread and the valve seats from damage
and cracking.
» If there is damage or cracking:
–
Change the cylinder head.
305005-10
–
Using a straightedge and the special tool, check the sealing area of the cylinder for
distortion.
Feeler gauge (59029041100) (
Cylinder/cylinder head - distortion of
sealing area
≤
0.10 mm (
≤
0.0039 in)
» If the measured value does not meet specifications:
–
Change the cylinder head.