Crankshaft And Connecting Rod - Yamaha XC125 Service Manual

ENG INSPECTION AND REPAIR
CRANKSHAFT AND CONNECTING ROD
Crankshaft Runout
1. Measure:
_ = Crankshaft runout (_
Use V-Blocks and Dial Gauge (YU-03097).
Out of specification -_ Replace.
_ Runout Limit:
Right: 0,03 mm 10.0012 in)
® Big end side clearance
Out of specification -* Replace connect-
_= _1 ing rod.
(_ _ STD Big End Side Clearance:
0.05 ~ 0.45 mm
(0.0020 _ 0.0177 in)
-_ Limit: 0.5 mm (0.0197 in)
® Small end free play
Out of specification -+ Replace connect-
ing rod.
' Small End Free Play:
Standard: 0,8 _ 1.0 mm
(0.031 ~ 0,039 in)
Limit: 1.5 mm (0.059 in)
® Crank width (_)
Out of specification -_ Replace crank-
shaft.
_ Crank Width:
44.95 ~ 45.00 mm
(1.770 ~ 1.772 in)
Crankshaft Bearings
1. Inspect:
= Bearing races
Pitting/Rust/Scoring -_ Replace.
, _;z: NOTE:
_. ® Clean and dry bearing before checking.
® Lubricate bearings immediately after ex-
amining them to prevent rust.
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