width YAMAHA YZ250F 2001 User Guide

4 - 59
ENG
OIL FILTER ELEMENT, WATER PUMP AND RIGHT
CRANKCASE COVER
2. Install:
lBearing 1
NOTE:
Install the bearing by pressing its outer race
parallel.
Impeller shaft
1. Install:
lImpeller shaft 1
lWasher 2
lImpeller 3
NOTE:
lTake care so that the oil seal lip is not dam-
aged or the spring does not slip off its posi-
tion.
lWhen installing the impeller shaft, apply the
lithium soap base grease on the oil seal lip
and impeller shaft. And install the shaft while
turning it.
lHold the impeller shaft on its width across
the flats a with spanners, etc. and remove
the impeller.
T R..14 Nm (1.4 m · kg, 10 ft · lb)
Right crankcase cover
1. Install:
lDowel pin 1
lO-ring 2
lCollar 3
lGasket 4
NOTE:
Apply the lithium soap base grease on the O-
ring.

4 - 91
ENGCRANKCASE AND CRANKSHAFT
EC4N4201
Crankshaft
1. Measure:
lRunout limit a
lSmall end free play limit b
lConnecting rod big end side clearance
c
lCrank width d
Out of specification ® Replace.
Use the dial gauge and a thickness
gauge.
Dial gauge and stand:
YU-3097/90890-01252
Standard
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:55.95 ~ 56.00 mm
(2.203 ~ 2.205 in)—
Oil strainer
1. Inspect:
lOil strainer
Damage ® Replace.
Oil delivery pipe 2
1. Inspect:
lOil delivery pipe 2 1
lO-ring 2
Damage ® Replace.
lOil orifice a
Clogged ® Blow.