width YAMAHA WR 250F 2002 User Guide

4 - 61
ENG

OIL FILTER ELEMENT, WATER PUMP AND RIGHT
CRANKCASE COVER
2. Install:

Bearing
1

NOTE:

Install the bearing by pressing its outer race
parallel.
Impeller shaft
1. Install:

Impeller shaft
1


Washer
2


Impeller
3

NOTE:


Take care so that the oil seal lip is not dam-
aged or the spring does not slip off its posi-
tion.

When 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.

Hold the impeller shaft on its width across
the flats
a
with spanners, etc. and install the
impeller.
T R..14 Nm (1.4 m · kg, 10 ft · lb)

Right crankcase cover
1. Install:

Dowel pin
1


O-ring
2


Collar
3


Gasket
4

NOTE:

Apply the lithium soap base grease on the O-
ring.

4 - 93
ENGCRANKCASE 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
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:
Oil strainer
Damage → Replace.
Oil delivery pipe 2
1. Inspect:
Oil delivery pipe 2 1
O-ring 2
Damage → Replace.
Oil orifice a
Clogged → Blow.