Yamaha TT-R50E, Owner'S Service Manual

Page: 292 / 390

4 - 53
ENG
CRANKCASE AND CRANKSHAFT
INSPECTION
Crankshaft
1. Measure:
• Runout limit
a
• Connecting rod big end side clearance
b
• Connecting rod big end radial clearance
c
• Crank width
d
Out of specification
→
Replace.
Use the dial gauge and a thickness
gauge.
Standard Limit
Runout
limit
—
0.03 mm
(0.0012 in)
Side
clearance 0.10 ~ 0.40 mm
(0.0039 ~ 0.0157 in)
0.50 mm
(0.02 in)
Radial
clearance 0.010 ~ 0.025 mm
(0.0004 ~ 0.0010 in)
0.05 mm
(0.002 in)
Crack
width 42.95 ~ 43.00 mm
(1.691 ~ 1.693 in)
—
ASSEMBLY AND INSTALLATION
Crankcase
1. Apply:
• Sealant
On the left crankcase.
NOTE:
• Clean the contacting surface of crankcase
(left and right) before applying the sealant.
• DO NOT ALLOW any sealant to come in
contact with the oil gallery
a
.
Yamaha bond No. 1215:
90890-85505
a