Spark Plug Cap; Ignition Coil; Source Coil/Pulser Coil - Yamaha VK540EF Service Manual

IGNITION SYSTEM

SPARK PLUG CAP

1. Remove:
S Spark plug cap
2. Connect:
S Pocket tester
(to the spark plug cap)
3. Measure:
S Spark plug cap resistance
Out of specification ! Replace.
Spark plug cap resistance:
5 kΩ at 20_C (68_F)

IGNITION COIL

1. Disconnect:
S Ignition coil lead
S Spark plug lead
2. Connect:
S Pocket tester
(to the ignition coil and spark plug lead)
3. Measure:
S Primary coil resistance 1
S Secondary coil resistance 2
Out of specification ! Replace.
Primary coil resistance 1 :
0.2 Ω
Secondary coil resistance 2 :
4.9 kΩ

SOURCE COIL/PULSER COIL

1. Disconnect:
S CDI magneto coupler
2. Connect:
S Pocket tester
(to CDI magneto coupler)
3. Measure:
S Source coil/pulser coil resistance
Out of specification ! Replace.
Source coil resistance: 1 (Br-R)
275 Ω
Pulser coil resistance: 2 (W/R-B)
20 Ω
7-4
ELEC
20% at 20_C (68_F)
20% at 20_C (68_F)
20% at 20_C (68_F)
20% at 20_C (68_F)