Yamaha YZ125 2009, Owner'S Service Manual

Page: 144 / 234

4-61
CRANKCASE AND CRANKSHAFT
A. For USA and CDN
B. Except for USA and CDN
6. Install:
• Clamp "1"
• Bolt (crankcase) "2"
Tighten the crankcase tightening bolts in stage,
using a crisscross pattern.
7. Install:
• Holder "1"
• Bolt (holder) "2"
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, it may be
damaged. Take care not to give an impact to
the segment when tightening the bolt.
9. Remove:
• Sealant
Forced out on the cylinder mating surface.
10.Apply:
• Engine oil
To the crank pin, bearing, oil delivery hole
and connecting rod big end washer.
11.Check:
• Crankshaft and transmission operation.
Unsmooth operation
→
Repair.
If the crankshaft will not turn smoothly, make an
adjustment by gently tapping its right end with
a soft hammer.
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)
(1.77 1.97 in)
(0.98 1.50 in)
(0.16 0.20 in)