Honda GP200H Manual page 88

VALVE FACE/VALVE STEM O.D.
Inspect each valve face [1] for irregularities.
If necessary, replace the valve.
Inspect each valve [2] for bending or abnormal stem
wear.
If necessary, replace the valve.
Measure and record each valve stem O.D.
STANDARD:
IN: 5.468 – 5.480 mm (0.2153 – 0.2157 in)
EX: 5.425 – 5.440 mm (0.2136 – 0.2142 in)
SERVICE LIMIT:
IN: 5.318 mm (0.2094 in)
EX: 5.275 mm (0.2077 in)
If the measurement is less than the service limit,
replace the valve.
GUIDE-TO-STEM CLEARANCE
Subtract each valve stem O.D. from the corresponding
guide I.D. to obtain the guide-to-stem clearance.
STANDARD:
IN: 0.020 – 0.044 mm (0.0008 – 0.0017 in)
EX: 0.060 – 0.087 mm (0.0024 – 0.0034 in)
SERVICE LIMIT:
IN: 0.10 mm (0.004 in)
EX: 0.12 mm (0.005 in)
If the calculated clearance is more than the service limit,
replace the valve and cylinder head as a set
(page 12-4).
VALVE SPRING FREE LENGTH/
PERPENDICULARITY
Measure the valve spring free length.
STANDARD: 30.5 mm (1.20 in)
SERVICE LIMIT: 29.0 mm (1.14 in)
If the measured length is less than the service limit,
replace the valve spring.
Measure the valve spring perpendicularity.
SERVICE LIMIT: 1.5° max.
If the measured perpendicularity is more than the
service limit, replace the valve spring.
CYLINDER HEAD
[2]
[1]
12-7