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Throttle Lever; Speed Limiter - Yamaha YFZ450R 2017 Owner's Manual

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EBU18284

Throttle lever

4
1. Throttle lever
Push the throttle lever to increase engine speed
and the speed of the ATV. Because the throttle is
spring-loaded, the ATV will decelerate and the en-
gine will return to an idle any time the throttle lever
is released.
TIP
Before starting the engine, check the throttle to be
sure it is operating smoothly. Make sure it returns
to the idle position as soon as the lever is released.
1
EBU18325

Speed limiter

3
1. Locknut
2. Adjusting screw
3. No more than 12 mm (0.47 in)
The speed limiter keeps the throttle from fully
opening, even when the throttle lever is pushed to
the maximum.
Adjusting the speed limiter
1. Loosen the locknut.
2. To increase the maximum engine power
available and the maximum speed of the ATV,
turn the adjusting screw in direction (a). To
decrease the maximum engine power avail-
able and the maximum speed of the ATV, turn
4-4
1
2
(b)
(a)

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