Service manual
Table Of Contents
- Inroduction
- Yamaha Motor Corporation, USA YZ/WR Motorcycle Limited Warranty
- How to use this Manual
- Index
- Contents
- Chapter 1 General Information
- Chapter 2 Specifications
- Chapter 3 Regular Inspection and Adjustments
- Chapter 4 Engine
- Seat, Fuel Tank and Side Covers
- Exhaust Pipe and Silencer
- Radiator
- Carburetor and Reed Valve
- Cylinder Head, Cylinder and Piston
- Clutch and Primary Driven Gear
- Kick Axle, Shift Shaft and Primary Drive Gear
- YPVS Govenor
- Water Pump
- CDI Magneto
- Engine Removal
- Crankcase and Crankshaft
- Transmission, Shift Cam and Shift Fork
- Chapter 5 Chassis
- Chapter 6 Electrical
- Chapter 7 Tuning
4-29
ENG
CYLINDER HEAD, CYLINDER AND PISTON
7. Install:
9
Cylinder head 1
9
Copper washer 2
9
Nut (cylinder head) 3
NOTE:
Tighten the nuts (cylinder head) in stage, using a
crisscross pattern.
8. Install:
9
Engine bracket 1
9
Nut (engine bracket) 2
9
Engine mounting nut (upper) 3
9. Install:
9
Spark plug 1
9
Spark plug cap 2
28 Nm (2.8 m•kg, 20 ft•lb)
34 Nm (3.4 m•kg, 24 ft•lb)
34 Nm (3.4 m•kg, 24 ft•lb)
20 Nm (2.0 m•kg, 14 ft•lb)
5. Install:
9
Gasket (power valve housing)
9
Power valve housing 1
9
Bolt (power valve housing) 2
6. Install:
9
O-ring 1
NOTE:
Apply the lithium soap base grease on the O-
rings.
4 Nm (0.4 m•kg, 2.9 ft•lb)
1C3-28199-10 118 04.5.17, 9:22:33 PM