3-30 ENGINE
CAM CHAIN TENSION ADJUSTER AND TEN-
SIONER
Check that the push rod slides smoothly when unlocking the
ratchet mechanism
1.
If push rod does not slide smoothly, replace the cam chain ten-
sion adjuster with a new one.
Check the contacting surface of the cam chain tensioner and
cam chain guide.
If it is found to be damaged, raplace it with a new one.
CYLINDER
CYLINDER DISTORTION
Check the gasket surface of the cylinder block for distortion
using a straightedge and thickness gauge. Take clearance read-
ings at several places. If any clearance reading exceeds the ser-
vice limit, replace the cylinder block with a new one.
& 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 dam-
age. Measure the cylinder bore diameter at six places.
& 09900-20508: Cylinder gauge set
% Cylinder bore
Standard: 90.000 – 90.015 mm (3.5433 – 3.5439 in)
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