EasyManua.ls Logo

Yamaha YZ450F 2021 - Troubleshooting

Yamaha YZ450F 2021
368 pages
Print Icon
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Loading...
IGNITION SYSTEM
8-3
EAM30278
TROUBLESHOOTING
The ignition system fails to operate (no spark or intermittent spark).
TIP
Before troubleshooting, remove the following part(s):
1. Side cover (left/right)
2. Seat
3. Fuel tank
4. Air scoop (left/right)
5. Air filter case cover
1. Check the ignition system wire har-
ness connections.
NG
Reconnect.
OK
2. Check the fuse(s).
Refer to “CHECKING THE FUSES”
on page 8-45.
NG
Replace the fuse(s).
OK
3. Check the battery.
Refer to “CHECKING AND
CHARGING THE BATTERY” on
page 3-35.
NG
Clean the battery terminals.
Recharge or replace the battery.
OK
4. Check the spark plug.
Refer to “CHECKING THE SPARK
PLUG” on page 3-12.
NG
Correct or replace the spark plug.
OK
5. Check the ignition spark gap.
Refer to “CHECKING THE IGNI-
TION SPARK GAP” on page 8-48.
OK
The ignition system circuit is OK.
NG
6. Check the ignition coil.
Refer to “CHECKING THE IGNI-
TION COIL” on page 8-49.
NG
Replace the ignition coil.
OK
7. Check the engine stop switch.
Refer to “CHECKING THE
SWITCHES” on page 8-43.
NG
Replace the engine stop switch.
OK
8. Check the crankshaft position sen-
sor.
Refer to “CHECKING THE CRANK-
SHAFT POSITION SENSOR” on
page 8-49.
NG
Replace the crankshaft position sensor.
OK

Table of Contents

Related product manuals