
Engine Mechanical: 1D-38
CAUTION
!
• The valve seat contact area must be
inspected after each cut.
• Do not use lapping compound after the
final cut is made. The finished valve seat
should have a velvety smooth finish but
not a highly polished or shiny finish. This
will provide a soft surface for the final
seating of the valve which will occur
during the first few seconds of engine
operation.
NOTE
After servicing the valve seats, be sure to
check the valve clearance after the cylinder
head has been reinstalled. Refer to “Valve
Clearance Inspection and Adjustment in
Section 0B (Page 0B-5)”.
Cylinder Inspection
B933H21406029
Refer to “Engine Top Side Disassembly (Page 1D-17)”
and “Engine Top Side Assembly (Page 1D-20)”.
Cylinder distortion
Check the gasket surface of the cylinder for distortion.
Use a straightedge and thickness gauge. Take clearance
readings at several places. If any reading exceeds the
service limit, replace the cylinder.
Special tool
: 09900–20803 (Thickness gauge)
Cylinder distortion
Service limit: 0.05 mm (0.002 in)
Cylinder bore
Inspect the cylinder wall for any scratches, nicks or other
damage (Measure the cylinder bore diameter at six
places). If any defects are found, replace the cylinder
with a new one.
Special tool
(A): 09900–20508 (Cylinder gauge set)
Cylinder bore
Standard: 90.000 – 90.015 mm (3.5433 – 3.5439 in)
Piston-to-cylinder clearance
Refer to “Piston and Piston Ring Inspection (Page 1D-
40)”.
I933H1140142-01
(A)
I933H1140143-01
I933H1140144-01
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Содержание LT-Z400
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