Suzuki LT-Z50 - Accessory Use and Vehicle Loading

ENGINE 3-17
VALVE FACE WEAR
Visually inspect each valve for wear or damage of its seating
face.
If anything unusual is found, replace the valve with a new one.
Measure the valve head thickness T.
If the thickness is less than the service limit, replace the valve
with a new one.
 Valve head thickness (IN & EX):
Service Limit: 0.5 mm (0.02 in)
 09900-20102: Vernier calipers
VALVE STEM RUNOUT
Support the valve on V-blocks and measure the valve stem
runout.
If the valve stem runout exceeds the service limit, replace the
valve.
 Valve stem runout (IN & EX):
Service Limit: 0.05 mm (0.002 in)
 09900-20607: Dial gauge (1/100 mm)
09900-20701: Magnetic stand
09900-21304: V-block set (100 mm)
VALVE HEAD RADIAL RUNOUT
Place the dial gauge at right angles to the valve head face and
measure the valve head radial runout.
If the valve head radial runout exceeds the service limit, replace
the valve.
 Valve head radial runout (IN & EX):
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 STEM DEFLECTION
Lift the valve head 10 mm (0.39 in) from the valve seat and mea-
sure the deflection in X and Y directions as shown.
If the deflection exceeds the service limit, measure the valve
stem outside diameter.
 Valve stem deflection (IN & EX):
Service Limit: 0.35 mm (0.014 in)
 09900-20607: Dial gauge (1/100 mm)
09900-20701: Magnetic stand
X
Y
PartShark.com
877-999-5686