Yamaha WR450FB 2012 Owner's Service Manual page 309

8. Check the engine stop switch.
Refer to "CHECKING THE
SWITCHES" on page 9-60.
OK
9. Check the neutral switch.
Refer to "CHECKING THE
SWITCHES" on page 9-60.
OK
10.Check the relay unit (Starting circuit
cut-off relay).
Refer to "CHECKING THE RE-
LAYS" on page 9-69.
OK
11.Check the lean angle sensor.
Refer to "CHECKING THE LEAN
ANGLE SENSOR" on page 9-72.
OK
12.Check the entire ignition system's
wiring.
Refer to "CIRCUIT DIAGRAM" on
page 9-2.
OK
Replace the ECU.
NG
Replace the engine stop switch.
NG
Replace the neutral switch.
NG
Replace the relay unit.
NG
Replace the lean angle sensor.
NG
Properly connect or repair the ignition sys-
tem's wiring.
9-5