Checking The Ignition Timing - Yamaha YFM450FAR Service Manual

CHECKING THE IGNITION TIMING

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CHECKING THE IGNITION TIMING
NOTE:
Engine idling speed and throttle cable free play
should be adjusted properly before checking
the ignition timing.
1.Remove:
Seat
G
Fuel tank side panel (right)
G
Refer to "SEAT, CARRIERS, FENDERS
AND FUEL TANK".
2.Attach:
Inductive tachometer or engine tachometer
G
Timing light
G
(to spark plug lead)
Inductive tachometer:
P/N. YU-8036-A
Engine tachometer:
P/N. 90890-03113
Timing light:
P/N. YM-33277-A, 90890-03141
3.Check:
Ignition timing
G
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Checking steps:
G
Warm up the engine and keep it at the
specified speed.
Engine speed:
1,450 ~ 1,550 r/min
Remove the recoil starter 1.
G
Remove the timing plug 2.
G
Visually check the stationary pointer 3 to
G
verify it is within the required firing range 4
indicated on the flywheel.
Incorrect firing range → Check the pulser coil
assembly.
G
Install the timing plug.
G
Install the recoil starter.
Recoil starter bolt:
10 Nm (1.0 m • kg, 7.2 ft • Ib)
LOCTITE
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CHK
ADJ
®