Speed Limiter And Air Intake Restrictor Plate - Yamaha YFM80GX Owner's Manual

EWB00200
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POTENTIAL HAZARD
Malfunction of throttle.
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WHAT CAN HAPPEN
The throttle could be hard to operate, making
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it difficult to speed up or slow down when
you need to. This could cause an accident.
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HOW TO AVOID THE HAZARD
Check the operation of the throttle lever be-
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fore you start the engine. If it does not work
smoothly, check for the cause. Correct the
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problem before riding the ATV. Consult a
Yamaha dealer if you can't find or solve the
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problem yourself.
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EBU18331
Speed limiter and air intake restrictor
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plate
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Your ATV was delivered with an adjustable speed
limiter and an air intake restrictor plate. Yamaha
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recommends that all beginning riders start off with
the speed limiter adjusting screw fully turned in and
the air intake restrictor plate installed to limit the
amount of speed available while they learn.
The speed limiter keeps the throttle from fully
WARNING
opening, even when the throttle lever is pushed to
the maximum. The adjusting screw may be gradu-
ally turned out as the beginner becomes more fa-
miliar with operating the ATV. Parents should
decide when to adjust the ATV for more power as
their youngster's riding skills improve. Once the
ATV rider can operate with skill at the top speed
permitted by adjusting the speed limiter alone, the
air intake restrictor plate can be removed. Since re-
moval of this plate will result in a significant in-
crease in power, turn the adjusting screw
completely back in again; adjust it out in stages as
done previously.
1. Loosen the locknut.
2. To increase the maximum engine power avail-
able and the maximum speed of the ATV, turn
the adjusting screw in direction (a). To de-
crease the maximum engine power available
and the maximum speed of the ATV, turn the
adjusting screw in direction (b).
NOTE:
Adjusting for maximum throttle lever movement
without removing the air intake restrictor plate will
cause the engine to run roughly at higher speeds.
(See page 8-18.)
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