Suzuki LT-Z400, Service Manual

Page: 178 / 492

1D-33 Engine Mechanical:
• Install the other valves and springs in the same
manner as described previously.
• Install the tappet shims and the tappets to their
original positions.
NOTE
• Apply engine oil to the stem end, shim and
tappet before fitting them.
• When seating the tappet shim, be sure the
figure printed surface faces the tappet.
Cylinder Head Related Parts Inspection
B933H21406026
Refer to “Cylinder Head Disassembly and Assembly
(Page 1D-29)”.
Cylinder head distortion
1) Decarbonize the combustion chambers.
2) Check the gasket surface of the cylinder head for
distortion. Use a straightedge and thickness gauge.
Take clearance readings at several places. If
readings exceed the service limit, replace the
cylinder head.
Special tool
: 09900–20803 (Thickness gauge)
Cylinder head distortion
Service limit: 0.05 mm (0.002 in)
Valve stem runout
Support the valve using V-blocks, as shown in the figure,
and check its runout using the dial gauge. If the runout
exceeds the service limit, replace the valve.
Special tool
(A): 09900–20607 (Dial gauge (1/100 mm, 10
mm))
(B): 09900–20701 (Magnetic stand)
(C): 09900–21304 (V-block (100 mm))
Valve stem runout (IN. & EX.)
Service limit: 0.05 mm (0.002 in)
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.
Special tool
(A): 09900–20607 (Dial gauge (1/100 mm, 10
mm))
(B): 09900–20701 (Magnetic stand)
(C): 09900–21304 (V-block (100 mm))
Valve head radial runout (IN. & EX.)
Service limit: 0.03 mm (0.001 in)
I933H1140133-01
I933H1140134-01
(A)
(C)
(B)
I649G1140231-03
(A)
(B)
(C)
I649G1140232-03
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