Note: To prevent the timing chain from falling into the crankcase, fasten it with a wire.
2. Install:
- timing chain drive gear sprocket
- timing chain drive gear shaft
Note: Make sure that the "2" mark on the timing chain drive gear sprocket is installed in the rear cylinder and the "3" mark on the timing chain drive gear sprocket is installed in the front cylinder.
![](https://motoinstruction.ru/img/yamaha/16/122326.jpg)
3. Install:
- stopper plate (1)
- stopper plate bolt: 10 Nm (1.0 m·kg)
Note: Turn the timing chain drive gear shaft so that the stopper plate fits correctly into the slot and then fasten the stopper plate with the bolt.
![](https://motoinstruction.ru/img/yamaha/16/122327.jpg)
Front cylinder
1. Install:
- (Front cylinder)
- springs (1)
- dowel pins
- timing drive gear (2)
![](https://motoinstruction.ru/img/yamaha/16/122328.jpg)
Note:
- Insert the suitable pin (3) into the hole of timing chain drive gear sprocket and match the gear teeth.
- Push the projections (a) on the timing drive gear into the spaces (b).
- Align the punch mark (c) on the timing drive gear, the punch mark (d) on the timing chain drive gear sprocket and the key posision (e) as shown.
![](https://motoinstruction.ru/img/yamaha/16/122329.jpg)
2. Install:
- claw washer
- lock washer (1) New
- primary drive gear nut (2): 110 Nm (11.0 m·kg)
Note: While holding the generator rotor with the sheave holder, tighten the primary drive gear nut.
![](https://motoinstruction.ru/img/yamaha/16/122330.jpg)
3. Bend the lock washer tab along a flat side of the nut.
Rear cylinder
Note: When installing the rear cylinder timing gear, repeat the front cylinder timing gear installation procedure. However, note the following points.
1. Install:
- springs
- dowel pins
- timing drive gear
- rotor assembly. Refer to "Generator and starter clutch".