Yamaha 25BMH, Service Manual

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FEATURES AND BENEFITS
GEN
INFO
1-10
E
IGNITION TIMING IN NEUTRAL
As the throttle is opened while the shift in neutral, the Lever moves to the right until it
touches the Arm , and ignition timing advance is stopped at the point "A".
The Arm moves to the right or to the left when the shift is engaged, since it is interlocked
with the shift lever. Thus, when the shift is engaged, the Lever does not touch the Arm
at the point "A", allowing ignition timing advance to take place.
Fig. 5
a
b
b
a b
Fig. 4