Yamaha YZF-R25 Service Manual page 291

Crankcase bolts "1"–"6"
1st: 20 Nm (2.0 m·kgf, 14 ft·lbf)
*2nd: 24 Nm (2.4 m·kgf, 17 ft·lbf)
Crankcase bolts "7"–"8"
1st: 20 Nm (2.0 m·kgf, 14 ft·lbf)
*2nd: 26 Nm (2.6 m·kgf, 19 ft·lbf)
* Following the tightening order, loosen the
bolt one by one, and then retighten it to the
specific torque.
TIP
Tighten the bolts in the proper tightening se-
quence as shown.
8
5 1
4 2
8. Tighten:
• Crankcase bolts "9"–"21"
Crankcase bolts "9"–"21"
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
TIP
Tighten the bolts in the proper tightening se-
quence as shown.
×6 ×2
7
3
6
5-74
A
B
×3 ×3
19
18
17
16
A. Lower crankcase
B. Upper crankcase
9. Install:
• Balancer drive gear "1"
TIP
Align the punch mark "a" in the balancer drive
gear with the punch mark "b" in the balancer
driven gear.
CRANKCASE
9
10
×3 ×2
20
11
12
21
13
14
15
×2