3-50 ENGINE
CYLINDER
CRANKCASE SERVICING: 3-54
CYLINDER DISTORTION
• Check the gasketed surface of the cylinder for distortion with a
straightedge and thickness gauge, taking a clearance reading
at several places as indicated.
• If the largest reading at any position of the straightedge ex-
ceeds the limit, replace the cylinder.
[ 09900-20803: Thickness gauge
 Cylinder distortion:
Service Limit: 0.20 mm (0.008 in)
CYLINDER BORE
• Inspect the cylinder wall for any scratches, nicks or other dam-
age.
• Measure the cylinder bore diameter at six places.
 Cylinder bore:
Standard: 72.000 – 72.015 mm (2.8346 – 2.8352 in)
[ 09900-20508: Cylinder gauge set
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