Suzuki DL650K5 Service Manual page 96

3-42 ENGINE
VALVE HEAD RADIAL RUNOUT
Place the dial gauge at a right angle to the valve head face and
measure the valve head radial runout.
If it measures more than the service limit, replace the valve.
& Valve head radial runout
Service Limit: 0.03 mm (0.001 in)
" 09900-20607: Dial gauge (1/100 mm)
09900-20701: Magnetic stand
09900-21304: V-block set (100 mm)
VALVE FACE WEAR
Visually inspect each valve face for wear. Replace any valve
with an abnormally worn face. The thickness of the valve face
decreases as the face wears. Measure the valve face T. If it is
out of specification, replace the valve with a new one.
& Valve head thickness T
Service Limit: 0.5 mm (0.02 in)
" 09900-20102: Vernier calipers
VALVE STEM DEFLECTION
Lift the valve about 10 mm (0.39 in) from the valve seat.
Measure the valve stem deflection in two directions, "X" and "Y"
perpendicular to each other, by positioning the dial gauge as
shown.
If the deflection measured exceeds the limit, then determine
whether the valve or the guide should be replaced with a new
one.
& Valve stem deflection (IN & EX)
Service Limit: 0.35 mm (0.014 in)
" 09900-20607: Dial gauge (1/100 mm)
09900-20701: Magnetic stand
VALVE STEM WEAR
If the valve stem is worn down to the limit, as measured with a
micrometer, where the clearance is found to be in excess of the
limit indicated, replace the valve.
If the stem is within the limit, then replace the guide.
• After replacing valve or guide, be sure to recheck the clear-
ance.
& Valve stem O.D.
Standard (IN): 4.465 – 4.480 mm (0.1758 – 0.1764 in)
(EX): 4.455 – 4.470 mm (0.1754 – 0.1760 in)
" 09900-20205: Micrometer (0 – 25 mm)
NOTE:
If valve guides have to be removed for replacement after
inspecting related parts, carry out the steps shown in valve
guide servicing.