Suzuki VL125 Service Manual page 61

3-26 ENGINE
VALVE STEM DEFLECTION
With the valve inserted into the valve guide, lift the valve head 10
mm from the valve seat and measure the deflection in X and Y
directions.
# Valve stem deflection (IN & EX): Service Limit: 0.35 mm
! 09900-20606: Dial gauge (1/100 mm)
09900-20701: Magnetic stand
VALVE STEM DIAMETER
If the valve stem deflection exceeds the service limit, measure
the valve stem outside diameter. If the diameter measured is within
the standard range, replace the valve guide. (%3-27)
For each of upper, middle and lower sections within the sliding
range, two measurements, each in crosswise direction must be
taken.
# Valve stem O.D.: Standard (IN) : 4.475 – 4.490 mm
! 09900-20205: Micrometer (0 – 25 mm)
(EX): 4.455 – 4.470 mm
X X
Y Y