Yamaha CE50T Service Manual page 236

SPEC, ,CAT, OOS APPxt 1
MAINTENANCE SPECIFICATIONS
Engine
Model CG50U
Cylinder Head: *
Warp Limit _ /_ 0.03 mm (0.0012 in)
< "_ _ *Lines indicate straightedge measurement
Cylinder:
Bore Size 39.993-40.012 mm (1.575 in)
<Limit> 40.1 mm (1.579 in)
Taper Limit 0.05 mm (0.002 in)
Out of Round Limit 0.01 mm (0.0004 in)
Piston:
Piston Size _ 39.952-39.972 mm (1.573-1.574 in)
Measuring Point* ___ 5 mm (0.2 in)
Piston Clearance 0.034-0.047 mm (0.0013-0.0018 in)
Oversize: 2nd 40.50 mm (1.594 in)
Piston Ring:
Sectional Sketch (B x T)/Type
Top Ring _"_--_B 1.5x1.8 mm (0.059×0.071 in)/Keystone
2nd Ring _-4 1.5 x 1.8 mm (0.059 × 0.071 in)/Keystone
End Gap (Installed):
Top Ring 0.15-0.35 mm (0.006-0.014 in)
2nd Ring 0.15-0.35 mm (0.006-0.014 in)
Side Clearance (Installed)"
Top Ring 0.03-0.05 mm (0.0012-0.0020 in)
2nd Ring 0.03-0.05 mm (0.0012-0.0020 in)
Crankshaft: F
Crank Width "A" 37.90-37.95 mm I1.492- 1.494 in)
Run Out Limit "C" 0.03 mm (0.0012 in)
Connecting Rod Big End Side
Clearance "D" 0.2- 0.5 mm (0.008- 0.020 in)
Small End Free Play "F" 0.4-0.8 mm (0.015-0.031 in)
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