2001 YAMAHA YFM400F lock

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Speed limiter
The speed limiter keeps the throttle from fully
opening, even when the throttle lever is
pushed to the maximum. Screwing in the ad-
juster limits the maximum engine power avail-
able and decreases the maximum speed of the
ATV.
WARNING

Improper adjustment of the speed limiter and
throttle could cause throttle cable damage or
improper throttle operation. You could lose
control, have an accident or be injured. Do not
turn the speed adjuster out more than 12 mm
or the throttle cable could be damaged. Al-
ways make sure the throttle lever free play is
adjusted to 3 ~ 5 mm. See page 8-87.
1. Locknut 2. Adjusting bolt
1. Contre-écrou 2. Boulon de réglage
1. Contratuerca 2. Perno de ajuste

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Fuel tank cap
Remove the fuel tank cap by turning it counter-
clockwise.
1. Fuel tank cap
1. Bouchon de réservoir de carburant
1. Tapón del depósito de combustible

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Seat
To remove the seat, pull the seat lock lever up-
ward and pull up the seat at the rear.
To install the seat, insert the projection on the
front of the seat into the seat holder and push
down on the seat at the rear.NOTE:Make sure that the seat is securely fitted.
1. Seat 2. Seat lock lever
1. Selle 2. Levier de verrouillage de la selle
1. Asiento 2. Palanca de bloqueo del
asiento

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Parking on a slope
WARNING
Avoid parking on hills or other inclines. Park-
ing on a hill or other incline could cause the
ATV to roll out of control, increasing the
chance of an accident. If you must park on an
incline, place the machine transversely across
the incline, apply the parking brake, and block
the front and rear wheels with rocks or other
objects. Do not park the ATV at all on hills that
are so steep you could not walk up them easi-ly.
1. Bring the machine to a stop by applying
the brakes.
2. Stop the engine.
3. With the rear brake applied, shift the drive
select lever to the park position.

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1. Locknut 2. Adjusting bolt
1. Contre-écrou 2. Boulon de réglage
1. Contratuerca 2. Perno de ajuste
Speed limiter
For riders less experienced with this model,
this model is equipped with a speed limiter in
the throttle lever housing. The speed limiter
keeps the throttle from fully opening, even
when the throttle lever is pushed to the maxi-
mum. Screwing in the adjuster limits the max-
imum engine power available and decreases
the maximum speed of the ATV. Turning the
screw in decreases top speed and turning it out
increases top speed.
Loading and accessories
Use extra caution when riding the machine
with additional loads, such as accessories or
cargo. The machine’s handling may be ad-
versely affected. Reduce your speed when
adding additional loads.

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Throttle lever adjustmentNOTE:Adjust the engine idling speed before adjust-ing the throttle lever free play.
1. Loosen the locknut.
2. Turn the adjusting bolt until the throttle le-
ver free play is 3 ~ 5 mm.
3. Tighten the locknut.
1. Locknut 2. Adjusting bolt
1. Contre-écrou 2. Bouchon de réglage
1. Contratuerca 2. Perno de ajustea. Free play
a. Jeu
a. Juego libre

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3. Refill with the same type of brake fluid.
Mixing fluids may result in a harmful
chemical reaction and lead to poor brake
performance.
4. Be careful that water does not enter the
master cylinder reservoir when refilling.
Water will significantly lower the boiling
point of the fluid and may result in vapor
lock.
5. Brake fluid may deteriorate painted sur-
faces or plastic parts. Always clean up
spilled fluid immediately.
6. Have a Yamaha dealer check the cause if
the brake fluid level goes down.

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Rear brake lever adjustment
The rear brake lever free play should be 0.5 ~
2 mm.
1. Loosen the locknut.
2. Turn the adjusting bolt in direction a to
increase free play, and in direction b to
decrease free play.
3. Tighten the locknut.
If correct free play cannot be obtained, ask a
Yamaha dealer to make that adjustment.
Rear brake pedal height adjustmentNOTE:Adjust the rear brake before inspecting the rearbrake pads.
The top of the brake pedal should be posi-
tioned 53 ~ 60 mm above the top of the foot-
rest. If not, ask a Yamaha dealer to adjust it.
1. Locknut 2. Adjusting bolt
c. Free play
1. Contre-écrou 2. Boulon de réglage
c. Jeu
1. Contratuerca 2. Perno de ajuste
c. Juego librea. 53 ~ 60 mm