lock YAMAHA YFM50R 2009 Owners Manual

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WARNING

EWB00250
Malfunction of the throttle could make it diffi-
cult to speed up or slow down when you need
to. This could cause an accident. Check the op-
eration of the throttle lever before you start the
engine. If the throttle does not work smoothly,
check for the cause. Correct the problem be-
fore riding the ATV or consult a Yamaha dealer.
EBU18361
Speed limiter
Your ATV was delivered with an adjustable speed
limiter. Yamaha recommends that all beginning
riders start off with the speed limiter adjusting
screw fully turned in to limit the amount of speed
available while they learn.
The speed limiter keeps the throttle from fully
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.
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).
3. Tighten the locknut.
WARNING

EWB00230
Improper adjustment of the speed limiter and
throttle could cause throttle cable damage or
improper throttle operation. The child could
lose control, have an accident or be injured. Do
not turn the adjusting screw out more than 12
1. Locknut
2. Adjusting screw
3. No more than 12 mm (0.47 in)
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(b)
(a)

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mm (0.47 in) or the throttle cable could be dam-
aged.
EBU18391
Front brake lever
The front brake lever is located on the right handle-
bar. To apply the front brake, pull the brake lever
toward the handlebar grip.
EBU18401
Rear brake lever
The rear brake lever is located on the left handle-
bar. To apply the rear brake, pull the brake lever to-
ward the handlebar grip.
EBU18460
Parking brake
Use the parking brake before starting the engine or
parking the ATV, especially on a slope. Apply the
rear brake lever and push down the lock plate to
apply the parking brake. Squeeze the rear brake
lever to release the parking brake.
1. Front brake lever
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1. Rear brake lever
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WARNING

EWB00220

Always set the parking brake before starting
the engine. The ATV could start moving un-
expectedly if the parking brake is not ap-
plied. This could cause loss of control or a
collision.

Always be sure you have released the park-
ing brake before you begin to ride. The brake
could overheat if you ride the ATV without re-
leasing the parking brake. You could lose
braking performance which could cause an
accident. You could also wear out the brakes
prematurely.
EBU18630
Drive select lever
The drive select lever is located on the left side of
the engine. Use the drive select lever to shift the
transmission into drive or neutral.
EBU18720
Fuel tank cap
Remove the fuel tank cap by turning it counter-
clockwise.
1. Parking brake lock plate
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1. Drive select lever
2. Drive position
3. Neutral position
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Move the choke in direction (b) to turn off the
choke.
See the “Starting a cold engine” section on page
6-1 for proper operation.
EBU18870
Seat
To remove the seat
Pull the seat lock lever upward 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.TIP

Make sure that the seat is securely fitted.
1. Fully open “ON”
2. Half open (warming up position)
3. Closed “OFF”
4. Choke
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(b) (a)

1. Seat lock lever
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EBU20800
Parking on a slope
WARNING

EWB00880
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 ATV transversely across the
incline, shift the shift lever to the drive posi-
tion, stop the engine, apply the parking brake,
and then 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 easily.
1. Bring the ATV to a stop by applying the brakes
in the drive position.
2. Stop the engine.
3. With the rear brake lever applied, apply the
parking brake and slowly release the brake le-
ver.
1. Parking brake lock plate
1. Locked position
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to continue up the hill, dismount the ATV on the up-
hill side. Physically turn the ATV around and then
descend the hill.
If you start to roll backwards, DO NOT apply the
rear brake to stop or try to put the ATV in gear. The
ATV could easily tip over backwards. Instead, ap-
ply the front brake gradually, or dismount the ATV
immediately on the uphill side.
WARNING

EWB01761
Maintain a steady speed when climbing a hill.
If you lose all forward speed:

Keep weight uphill.

Apply the brakes.

Lock the parking brake after you are
stopped.
If you begin rolling backwards:

Keep weight uphill.

Never apply the rear brake while rolling
backwards. Apply the front brake.

When fully stopped, apply the rear brake as
well, and then lock the parking brake.
Dismount on uphill side or to a side if pointed
straight uphill. Turn the ATV around and re-
mount, following the procedure described in
the Owner’s Manual.RIDING DOWNHILL
When riding your ATV downhill, shift your weight
as far to the rear and uphill side of the ATV as pos-
sible. Move back on the seat and sit with your arms
straight. Allow the engine compression to do most
of the braking for you. Improper braking may cause
a loss of traction.
Use caution while descending a hill with loose or
slippery surfaces. Braking ability and traction may
be adversely affected by these surfaces. Improper
braking may also cause a loss of traction.
Whenever possible, ride your ATV straight down-

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Rear brake

EBU24330
Adjusting the front brake lever free
play
The brake lever free play must be checked and, if
necessary, adjusted at the intervals specified in
the periodic maintenance and lubrication chart.
TIP

Before adjusting the brake lever free play, check
the front brake shoes for wear.The brake lever free play should measure 10.0–
12.0 mm (0.39–0.47 in) as shown. If the free play
is incorrect, adjust it as follows.
1. Loosen the upper locknut and fully turn in the
upper adjusting bolt.
2. Loosen the lower locknut.
3. Turn the lower adjusting bolt in direction (a) to
increase the free play, and in direction (b) to
decrease it.
1. Wear limit mark
2. Wear indicator
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1. Brake lever free play
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4. Tighten the lower locknut.
5. While applying the front brake, turn out the up-
per adjusting bolt until the upper and lower ca-
ble lengths are equal. The cable joint will
become vertical.6. Tighten the upper locknut.
WARNING

EWB02080
Operating with improperly serviced or adjust-
ed brakes could cause loss of braking ability,
which could lead to an accident.
After servicing:

Make sure the brakes operate smoothly and
that the free play is correct.

Make sure the brakes do not drag.
Replacement of brake components requires
professional knowledge. These procedures
1. Upper locknut
2. Upper adjusting bolt
3. Lower locknut
4. Lower adjusting bolt
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3(a)(b)(a)
(b)

1. Cable joint1

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should be performed by a Yamaha dealer.
EBU24451
Adjusting the rear brake lever free play
The brake lever free play must be checked and, if
necessary, adjusted at the intervals specified in
the periodic maintenance and lubrication chart.
TIP

Before adjusting the brake lever free play, check
the rear brake shoes for wear.
The brake lever free play should measure 7.0–
10.0 mm (0.28–0.39 in) as shown. If the free play
is incorrect, adjust it as follows.
1. Loosen the locknut at the brake lever.
2. Turn the brake lever free play adjusting bolt at
the brake lever in direction (a) to increase the
free play, and in direction (b) to decrease it.
3. Tighten the locknut at the brake lever.
If the specified free play cannot be obtained,
proceed with the following steps.
4. Loosen the locknut at the brake lever.
5. Fully turn the adjusting bolt at the brake lever
in direction (a) to loosen the brake cable.
6. To increase the brake lever free play, turn the
1. Locknut
2. Brake lever free play adjusting bolt
3. Brake lever free play
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(a)
(b)

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adjusting nut on the brake cable at the rear
wheel hub in direction (a), and to decrease it,
turn the nut in direction (b).
7. Tighten the locknut at the brake lever.
TIP

If the specified free play cannot be obtained as de-
scribed above or if the rear brake does not operate
correctly, have a Yamaha dealer check the internal
rear brake mechanism.
WARNING

EWB02080
Operating with improperly serviced or adjust-
ed brakes could cause loss of braking ability,
which could lead to an accident.
After servicing:

Make sure the brakes operate smoothly and
that the free play is correct.

Make sure the brakes do not drag.
Replacement of brake components requires
professional knowledge. These procedures
should be performed by a Yamaha dealer.
EBU24900
Checking and lubricating the cables
The operation and the condition of all control ca-
bles should be checked before each ride, and the
cables and cable ends should be lubricated if nec-
essary. If a cable is damaged or does not move
smoothly, have a Yamaha dealer check or replace
it.
1. Brake lever free play adjusting nut
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(a)(b)

Recommended lubricant:
Engine oil