2007 YAMAHA YFM50R wheel

RIDING YOUR ATV ...................................... 7-1
GETTING TO KNOW YOUR ATV.............. 7-2
RIDE WITH CARE AND GOOD
JUDGEMENT ...........................................7-2
BE CAREFUL WHERE YOU RIDE ............ 7-8
TURNING YOUR ATV ............................. 7-12
CLIMBING UPHILL .................................. 7-13
RIDING DOWNHILL................................. 7-16
CROSSING A SLOPE.............................. 7-17
CROSSING THROUGH SHALLOW
WATER ..................................................7-18
RIDING OVER ROUGH TERRAIN .......... 7-19
SLIDING AND SKIDDING ........................ 7-20
WHAT TO DO IF... ................................... 7-21
WHAT TO DO... ....................................... 7-21
PERIODIC MAINTENANCE AND MINOR
REPAIR .......................................................... 8-1
Owner’s manual and tool kit ...................... 8-1
Periodic maintenance and lubrication
chart ........................................................ 8-3
Checking the spark plug ............................ 8-7
Engine oil .................................................. 8-8
Final gear oil ............................................ 8-11
Cleaning the air filter element ................. 8-12
Cleaning the spark arrester ..................... 8-15
Adjusting the carburetor .......................... 8-17
Adjusting the engine idling speed ........... 8-17
Checking the throttle cable free play ....... 8-18Valve clearance ....................................... 8-18
Checking the front and rear brake
shoes .....................................................8-19
Adjusting the front brake lever free
play ........................................................8-20
Adjusting the rear brake lever free play ... 8-22
Checking and lubricating the cables ........ 8-23
Checking and lubricating the front and
rear brake levers ....................................8-24
Checking the wheel bearings ................... 8-24
Lubricating the knuckle shafts ................. 8-24
Lubricating the steering shaft ................... 8-25
Battery ..................................................... 8-25
Replacing the fuse ................................... 8-28
Removing a wheel ................................... 8-28
Installing a wheel ..................................... 8-29
Troubleshooting ....................................... 8-31
Troubleshooting chart .............................. 8-32
CLEANING AND STORAGE ..........................9-1
Cleaning ..................................................... 9-1
Storage ...................................................... 9-2
SPECIFICATIONS .......................................10-1
CONSUMER INFORMATION.......................11-1
Identification numbers .............................. 11-1

1-2
1
2
3
4
5
6
7
8
9
10
11


Never consume alcohol or drugs before or while
operating this ATV.

Never operate at speeds too fast for your skills
or the riding conditions. Always go at a speed
that is proper for the terrain, visibility, operating
conditions, and your experience.

Never attempt wheelies, jumps, or other stunts.

Always inspect your ATV each time you use it to
make sure it is in safe operating condition. Al-
ways follow the inspection and maintenance
procedures and schedules described in this
manual.

Always keep both hands on the handlebars and
both feet on the footrests of the ATV during op-
eration.

Always go slowly and be extra careful when op-
erating on unfamiliar terrain. Always be alert to
changing terrain conditions when operating the
ATV.

Never operate on excessively rough, slippery or
loose terrain until you have learned and prac-
ticed the skills necessary to control the ATV on
such terrain. Always be especially cautious on
these kinds of terrain.

Always follow proper procedures for turning as
described in this manual. Practice turning at lowspeeds before attempting to turn at faster
speeds and never turn at excessive speeds.

Never operate the ATV on hills too steep for the
ATV or for your abilities. Practice on smaller hills
before attempting larger hills.

Always follow proper procedures for climbing
hills as described in this manual. Check the ter-
rain carefully before you start up any hill. Never
climb hills with excessively slippery or loose sur-
faces. Shift your weight forward. Never open the
throttle suddenly or make sudden gear changes.
Never go over the top of a hill at high speed.

Always follow proper procedures for going down
hills and for braking on hills as described in this
manual. Check the terrain carefully before you
start down any hill. Shift your weight backward.
Never go down a hill at high speed. Avoid going
down a hill at an angle that would cause the ve-
hicle to lean sharply to one side. Go straight
down the hill where possible.

Always follow proper procedures for crossing
the side of a hill as described in this manual.
Avoid hills with excessively slippery or loose sur-
faces. Shift your weight to the uphill side of the
ATV. Never attempt to turn the ATV around on
any hill until you have mastered the turning tech-

5-2
1
2
3
45
6
7
8
9
10
11
WARNING

EWB00480
Always inspect your ATV each time you use it to make sure it is in safe operating condition.
Always follow the inspection and maintenance procedures and schedules described in the Owner’s
Manual. Failure to inspect increases the possibility of an accident or equipment damage.
Wheels and tires

Check wheel condition, and replace if damaged.

Check tire condition and tread depth. Replace if necessary.

Check air pressure. Correct if necessary.5-4, 5-5, 5-6
Brake levers

Make sure that operation is smooth. Lubricate lever pivoting points
if necessary.8-24
Chassis fasteners

Make sure that all nuts, bolts and screws are properly tightened. 5-6
Instruments and switches

Check operation, and correct if necessary. 5-6
Battery

Check electrolyte level. Fill with distilled water if necessary. 5-6, 8-25
ITEM ROUTINE PAGE

6-4
1
2
3
4
56
7
8
9
10
11
NOTE:

Before shifting the transmission into drive, be sure
to apply the parking brake. The engine will stop if
you attempt to shift into drive without applying the
parking brake first.
4. Squeeze the rear brake lever to release the
parking brake.
5. Gradually open the throttle while slowly re-
leasing the rear brake lever.
WARNING
EWB00740
Always open the throttle gradually. Opening
the throttle abruptly would increase the chance
of an accident. It could make the ATV wheelie
or overturn.
EBU20660
To decelerate
When slowing down or stopping, release the throt-
tle and apply the brakes smoothly and evenly. Im-
proper use of the brakes can cause the tires to lose
traction, reducing control and increasing the possi-
bility of an accident.
CAUTION:

ECB00190
Even with the transmission in the neutral posi-
tion, do not coast for long periods of time with
the engine off, and do not tow the ATV for long
distances. The transmission is properly lubri-
cated only when the engine is running. Inade-
quate lubrication may damage the
transmission.
1. Drive select lever
2. Drive position
1
2

6-6
1
2
3
4
56
7
8
9
10
11

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. Locked position
1

7-6
1
2
3
4
5
67
8
9
10
11

Yamaha recommends that all beginning riders
start off with the speed limiter turned in to limit the
amount of speed available while they learn. The
limiter may be gradually adjusted to increase max-
imum speed as the beginner becomes more famil-
iar with operating the ATV.
Loading and accessories
Use extra caution when riding the ATV with addi-
tional loads, such as accessories or cargo. The
ATV’s handling may be adversely affected. Re-
duce your speed when adding additional loads.
WARNING
EWB01460

Never exceed the stated load capacity for
this ATV.

Cargo should be properly distributed and se-
curely attached.

Reduce speed when carrying cargo or pull-
ing a trailer. Allow greater distance for brak-
ing.

Always follow the instructions in your Own-
er’s Manual for carrying cargo or pulling a
trailer.
During operation
Always keep your feet on the footboards during op-
eration, otherwise they may contact the rear
wheels.
1. Adjusting screw
1

MAXIMUM LOADING LIMIT
ATV loading limit (total weight of cargo, rider,
accessories, and tongue):
40.0 kg (88 lb)

7-7
1
2
3
4
5
67
8
9
10
11
WARNING

EWB01470
Always keep both hands on the handlebars
and both feet on the footboards of your ATV
during operation. Removing even one hand or
foot can reduce your ability to control the ATV
or could cause you to lose your balance and
fall off of the ATV. If you remove a foot from a
footboard, your foot or leg may come into con-
tact with the rear wheels, which could injure
you or cause an accident.
Avoid wheelies and jumping. You may lose controlof the ATV or overturn.WARNING
EWB01480
Never attempt stunts, such as wheelies or
jumps. Don’t try to show off.
ModificationsWARNING

EWB01490
Never modify this ATV through improper in-
stallation or use of accessories. All parts and
accessories added to this ATV should be gen-
uine Yamaha or equivalent components de-

7-12
1
2
3
4
5
67
8
9
10
11

With the engine idling, shift the transmission into
the drive position and then release the parking
brake. Apply the throttle slowly and smoothly. The
centrifugal clutch will engage and you will start to
accelerate. If the throttle is applied too abruptly, the
front wheels may lift off the ground, resulting in a
loss of directional control. Avoid higher speeds un-
til you are thoroughly familiar with the operation of
your ATV.
When slowing down or stopping, release the throt-
tle and apply the brakes smoothly and evenly. Im-
proper use of the brakes can cause the tires to lose
traction, reducing control and increasing the possi-
bility of an accident.
TURNING YOUR ATV
To achieve maximum traction on unpaved surfac-
es, the two rear wheels are mounted solidly on one
axle and turn together at the same speed. There-
fore, unless the wheel on the inside of the turn is al-
lowed to slip or lose some traction, the ATV will
resist turning. A special turning technique must be
used to allow the ATV to make turns quickly and
easily. It is essential that this skill be learned first at
low speed.
WARNING
EWB01570
Always follow proper procedures for turning
as described in this Owner’s Manual. Practice
turning at low speeds before attempting to turn
at faster speeds. Do not turn at speeds too fast
for your skills or the conditions.
As you approach a curve, slow down and begin to
turn the handlebars in the desired direction. As you
do so, put your weight on the footboard to the out-
side of the turn (opposite your desired direction)
and lean your upper body into the turn. Use the
throttle to maintain an even speed through the
turn. This maneuver will let the wheel on the inside
of the turn slip slightly, allowing the ATV to make
the turn properly.