Yamaha YZ250 Owner's Service Manual page 286

CLUTCH AND PRIMARY DRIVEN GEAR
å å
∫
EC493000
REMOVAL POINTS
EC483211
Clutch boss
1. Remove:
9 Nut 1
9 Lock washer 2
9 Clutch boss 3
NOTE:
Straighten the lock washer tab and use the
clutch holding tool 4, 5 to hold the clutch boss.
Clutch holding tool:
YM-91042................................ 4 4
90890-04086............................5 5
å For USA and CDN
∫ Except for USA and CDN
EC494000
INSPECTION
EC484100
Clutch housing and boss
1. Inspect:
9 Clutch housing 1
Cracks/Wear/Damage ¡ Replace.
9 Clutch boss 2
Scoring/Wear/Damage ¡ Replace.
EC484201
Primary driven gear
1. Check:
9 Circumferential play
Free play exists ¡ Replace.
9 Gear teeth a
Wear/ Damage ¡ Replace.
EC484400
Clutch spring
1. Measure:
9 Clutch spring free length a
Out of specification ¡ Replace springs as
a set.
Clutch spring free length:
Standard
50.0 mm
(1.969 in)
4-35
ENG
<Limit>
48.0 mm
(1.890 in)