Yamaha 2011 YZ250, Owner'S Manual

Page: 110 / 174

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CRANKCASE AND CRANKSHAFT
6. Install:
• Holder "1"
• Bolt (holder) "2"
• Bolt (crankcase)
Tighten the crankcase tightening
bolts in stage, using a crisscross pat-
tern.
7. Install:
• Tension spring "1"
• Holder "2"
• Bolt (holder) "3"
Install the holder so that it contacts
the projection "a" on the right crank-
case.
8. Install:
• Segment "1"
• Bolt (segment) "2"
• When installing the segment onto
the shift cam "3", align the punch
mark "a" with the dowel pin "b".
• Turn the segment clockwise until it
stops and tighten the bolt.
If the segment gets an impact, the
stopper lever may be damaged.
Take care not to give an impact to
it when tightening the bolt.
9. Remove:
• Sealant
Forced out on the cylinder mating
surface.
10. Apply:
• Engine oil
To the crank pin, bearing, oil de-
livery hole and connecting rod big
end washer.
11. Check:
• Crankshaft and transmission op-
eration.
Unsmooth operation
→
Repair.
Bolt (holder):
10 Nm (1.0 m•kg, 7.2
ft•lb)
Bolt (crankcase):
14 Nm (1.4 m•kg, 10
ft•lb)
Bolt (holder):
10 Nm (1.0 m•kg, 7.2
ft•lb)
Bolt (segment):
30 Nm (3.0 m•kg, 22
ft•lb)