Yamaha YZ450FT Automobile User Manual


 
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ENG
CRANKCASE AND CRANKSHAFT
EC4N4201
Crankshaft
1. Measure:
Runout limit a
Small end free play limit b
Connecting rod big end side clearance c
Crank width d
Out of specification Replace.
Use the dial gauge and a thickness
gauge.
Dial gauge and stand:
YU-3097/90890-01252
Standard <Limit>
Runout
limit:
0.03 mm
(0.0012 in)
0.05 mm
(0.002 in)
Small end
free play:
0.4 ~ 1.0 mm
(0.016 ~ 0.039 in)
2.0 mm
(0.08 in)
Side
clearance:
0.15 ~ 0.45 mm
(0.0059 ~ 0.0177 in)
0.50 mm
(0.02 in)
Crack
width:
61.95 ~ 62.00 mm
(2.439 ~ 2.441 in)
Oil strainer
1. Inspect:
Oil strainer
Damage Replace.
Oil delivery pipe 2
1. Inspect:
Oil delivery pipe 2
Cracks/damage Replace.
Oil delivery pipe holes 1
Clogged Blow out with compressed
air.