- Crankshaft journal bearings (with the recommended lubricant)
Recommended lubricant: Engine oil.
2. Apply:
- Sealant (onto the crankcase mating surfaces)
Yamaha bond No.1215. (Three Bond No.1215®) 90890-85505.
Do not allow any sealant to come into contact with the oil gallery or crankshaft journal bearings. Do not apply sealant to within 2-3 mm (0.08-0.12 in) of the crankshaft journal bearings.
![](https://motoinstruction.ru/img/yamaha/20/126743.jpg)
3. Install:
- Dowel pins
4. Set the shift drum assembly and transmission gears in the neutral position.
5. Install:
- Lower crankcase "1" (onto the upper crankcase "2")
Notice: Before tightening the crankcase bolts, make sure the transmission gears shift correctly when the shift drum assembly is turned by hand.
![](https://motoinstruction.ru/img/yamaha/20/126744.jpg)
6. Install:
- Crankcase bolts
- Lubricate the bolts "1"-"18" thread, mating surfaces and washers with engine oil.
- Lubricate the bolts "19"-"40" thread and mating surfaces with engine oil (except "31").
- Apply LOCTITE® to the screw of the bolt "31" and engine oil to the bearing surface.
- M9 x 100 mm bolts with washers: "1"- "10".
- M8 x 60 mm bolts with washers: "11"-"18".
- M8 x 60 mm bolts: "19", "20".
- M6 x 70 mm bolt: "31".
- M6 x 65 mm shoulder bolts: "21", "22"
- M6 x 60 mm bolts: "30", "32"-"36".
- M6 x 50 mm bolts: "23"-"25", "27"-"29", "40".
- M6 x 40 mm bolts: "26", "37"-"39".
![](https://motoinstruction.ru/img/yamaha/20/126745.jpg)
7. Tighten:
- Crankcase bolts "1"-"10"
Crankcase bolts (M9 x 100 mm) 1st: 30 Nm (3.0 m·kgf, 22 ft·lbf) *2nd: 18 Nm (1.8 m·kgf, 13 ft·lbf) 3rd: + 60°
* Following the tightening order, loosen the bolt one by one and then retighten it to the specific torque.
Tighten the bolts in the tightening sequence cast on the crankcase.
![](https://motoinstruction.ru/img/yamaha/20/126746.jpg)
8. Tighten:
- Crankcase bolts "11"-"40"
Crankcase bolts "11"-"20" 24 Nm (2.4 m·kgf, 17 ft·lbf).
Crankcase bolts "21"-"40" 10 Nm (1.0 m·kgf, 7.2 ft·lbf).
Tighten the bolts in the tightening sequence cast on the crankcase.
![](https://motoinstruction.ru/img/yamaha/20/126747.jpg)