Yamaha 2009 YFM25RY Service Manual page 221

3. Install:
• Right crankcase
(onto the left crankcase)
TIP
Tap lightly on the right crankcase with a soft-
face hammer.
4. Install:
• Crankcase bolt M6 × 70 mm: "1"–"3"
• Copper washers
To "1"–"3".
• Crankcase bolt M6 × 60 mm: "4", "5"
• Crankcase bolt M6 × 55 mm: "6"–"8"
• Crankcase bolt M6 × 45 mm: "9"–"12"
5. Tighten:
• Crankcase bolts "1"–"12"
Crankcase bolt
10 Nm (1.0 m·kg, 7.2 ft·lb)
TIP
Tighten each bolt 1/4 of a turn at a time, in
stages and in a crisscross pattern.
6. Install:
• Neutral switch "13"
7. Install:
• Crankshaft sprocket "1"
• Timing chain guide (intake side) "2"
• Timing chain "3"
8. Tighten:
• Timing chain guide (intake side) bolt
Timing chain guide (intake side)
bolt
8 Nm (0.8 m·kg, 5.9 ft·lb)
LOCTITE®
9. Apply:
• Engine oil
(onto the crankshaft pins bearings and oil
delivery holes)
10. Check:
• Crankshaft and transmission operation
Rough movement → Repair.
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CRANKCASE