Yamaha TT-R90(S) Owner's Service Manual page 278

CRANKCASE AND CRANKSHAFT
4 - 47
INSPECTION
Crankshaft
1. Measure:
Runout limit a
G
Connecting rod big end side clearance
G
b
Connecting rod big end radial clear-
G
ance c
Crank width d
G
Out of specification → Replace.
Use the dial gauge and a thickness
gauge.
Standard
Runout
limit
Side
0.10 ~ 0.40 mm
(0.0039 ~ 0.0157 in)
clearance
Radial
0.010 ~ 0.025 mm
(0.0004 ~ 0.0010 in)
clearance
Crack
42.95 ~ 43.00 mm
(1.691 ~ 1.693 in)
width
ASSEMBLY AND INSTALLATION
Crankcase
1. Apply:
Sealant
G
On the crankcase (left).
Quick gasket
ACC-QUICK-GS-KT
YAMAHA Bond No. 1215:
90890-85505
NOTE:
Clean the contacting surface of crankcase
G
(left and right) before applying the sealant.
DO NOT ALLOW any sealant to come in
G
contact with the oil gallery a.
ENG
Limit
0.03 mm
—
(0.0012 in)
—
0.05 mm
(0.002 in)
—
®
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