Yamaha 2002 YB50, Service Manual

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SPEC
MAINTENANCE SPECIFICATIONS
2-3
MAINTENANCE SPECIFICATIONS
ENGINE
Model YN50R
Cylinder head:
Warping limit 0.02 mm
* The lines indicate the measurement
Cylinder:
Internal diameter 39.993 ~ 40.012 mm
<Limit> <40.1 mm>
Taper limit 0.05 mm
Eccentricity limit 0.01 mm
Piston:
Piston size 39.952 ~ 39.972 mm
Measurement point 5 mm
Piston clearance 0.034 ~ 0.047 mm
First clearance 40.50 mm
Piston ring:
Cross section 1.5 x 1.8 mm
B x T
Distance between ends
(installed) 0.15 ~ 0.35 mm
<Limit> <0.6 mm>
Lateral clearance 0.03 ~ 0.05 mm
Crank shaft:
Width of crank shaft “A” 37.90 ~ 37.95 mm
Deflection limit “C” 0.03 mm
Connecting rod big
end clearance “D” 0.2 ~ 0.5 mm
Free play from small end “F” 0.4 ~ 0.8 mm
Free play “E” 0.004 ~ 0.017 mm