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
6-4
ELEC
IGNITION SYSTEM
EC626003
IGNITION COIL INSPECTION
1. Inspect:
9
Primary coil resistance
Out of specification → Replace.
2. Inspect:
9
Secondary coil resistance
Out of specification → Replace.
NOTE:
9 Remove the spark plug cap by turning it coun-
terclockwise and inspect.
9 Install the spark plug cap by turning it clock-
wise until it is tight.
Tester (+) lead→Yellow lead 1
Tester (–) lead
→Black lead 2
Tester (+) lead→Spark plug lead 1
Tester (–) lead
→Yellow lead 2
Primary coil Tester selector
resistance position
0.24~0.36Ω at
Ω× 1
20°C (68°F)
Secondary coil Tester selector
resistance position
5.7~8.5kΩ at
kΩ× 1
20°C (68°F)
1C3-28199-10 233 04.5.17, 9:30:09 PM