Yamaha CS50 User Manual

ELEC
IGNITION SYSTEM
8-10
EAS00744
3. Spark plug cap resistance
• Remove the spark plug cap from the spark
plug lead.
• Connect the pocket tester (“Ω x 1k” range)
to the spark plug cap as shown.
• Measure the spark plug cap resistance.
Spark plug cap resistance
10KΩ at 20°C
• Is the spark plug cap OK?
EAS00746
4. Ignition coil resistance
• Disconnect the ignition coil connectors
from the ignition coil terminals.
• Connect the pocket tester (Ω x 1) to the
ignition coil as shown.
Positive tester probe  red/black
Negative tester probe
 orange (gray)
• Measure the primary coil resistance.
Primary coil resistance
0.56 ~ 0.84 at 20°C
• Connect the pocket tester (Ω x 1k) to the
ignition coil as shown.
Negative tester probe

spark plug lead 
Positive tester probe

ground 
• Measure the secondary coil resistance.
Secondary coil resistance
5.68 ~ 8.52 kΩ at 20°C
• Is the ignition coil OK?
EAS00749
5. Main switch
• Check the main switch for continuity.
Refer to “CHECKING THE SWITCHES”.
• Is the main switch OK?
Replace the spark
plug cap.
Replace the ignition
coil.
Replace the main
switch.
YES
NO


YES
NO
YES
NO

Yamaha CS50 Specifications

General

Brand	Yamaha
Model	CS50
Category	Scooter
Language	English