engine YAMAHA YFM250R-W 2011 Owners Manual

EBU17420
TABLE OF CONTENTS
SAFETY INFORMATION .............................. 1-1
LOCATION OF THE WARNING AND
SPECIFICATION LABELS ............................ 2-1
DESCRIPTION .............................................. 3-1
Left view ...................................................... 3-1
Right view.................................................... 3-1
Controls and instruments ............................ 3-2
INSTRUMENT AND CONTROL
FUNCTIONS .................................................. 4-1
Main switch ................................................ 4-1
Indicator lights ............................................ 4-2
Speedometer .............................................. 4-2
Handlebar switches .................................... 4-3
Throttle lever .............................................. 4-4
Speed limiter .............................................. 4-5
Clutch lever ................................................ 4-6
Brake lever (YFM250R-W) .......................... 4-6
Brake lever (YFM250RSE-W) ..................... 4-7
Brake pedal ................................................ 4-7
Parking brake lever .................................... 4-8
Shift pedal .................................................. 4-9Fuel tank cap ..............................................4-9
Fuel ...........................................................4-10
Fuel cock ..................................................4-11
Starter (choke) ..........................................4-12
Steering lock .............................................4-13
Seat ..........................................................4-14
Adjusting the front shock absorber
assemblies (YFM250R-W).......................4-14
Adjusting the front shock absorber
assemblies (YFM250RSE-W) ..................4-15
Adjusting the rear shock absorber
assembly (YFM250R-W) .........................4-20
Adjusting the rear shock absorber
assembly (YFM250RSE-W).....................4-22
PRE-OPERATION CHECKS ..........................5-1
Pre-operation check list ..............................5-1
Fuel .............................................................5-3
Engine oil ....................................................5-3
Front and rear brakes .................................5-3
Throttle lever ...............................................5-4
Drive chain ..................................................5-4
Tires ............................................................5-4
Measuring the tire pressure ........................5-5U33B70E0.book Page 1 Wednesday, June 11, 2008 1:38 PM

Tire wear limit ............................................. 5-6
Chassis fasteners ....................................... 5-6
Instruments, lights and switches ................ 5-6
OPERATION .................................................. 6-1
Starting a cold engine ................................ 6-1
Starting a warm engine .............................. 6-3
Shifting ....................................................... 6-3
Engine break-in .......................................... 6-5
Parking ....................................................... 6-5
Parking on a slope ..................................... 6-6
Accessories and loading ............................ 6-7
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 ............. 7-9
TURNING YOUR ATV .............................. 7-13
CLIMBING UPHILL ................................... 7-14
RIDING DOWNHILL.................................. 7-17
CROSSING A SLOPE............................... 7-18
CROSSING THROUGH SHALLOW
WATER ................................................... 7-19
RIDING OVER ROUGH TERRAIN ........... 7-21
SLIDING AND SKIDDING ......................... 7-22
WHAT TO DO IF... .................................... 7-23WHAT TO DO... .........................................7-23
PERIODIC MAINTENANCE AND MINOR
REPAIR ..........................................................8-1
Owner’s manual and tool kit .......................8-1
Periodic maintenance chart for the
emission control system ...........................8-3
General maintenance and lubrication
chart ..........................................................8-5
Checking the spark plug .............................8-8
Engine oil and oil filter element ...................8-9
Cleaning the air filter element ...................8-13
Cleaning the spark arrester ......................8-17
Adjusting the carburetor ............................8-18
Adjusting the engine idling speed .............8-19
Adjusting the throttle cable free play .........8-20
Valve clearance ........................................8-20
Checking the front and rear brake pads ...8-21
Checking the brake fluid level ...................8-22
Changing the brake fluid ...........................8-24
Checking the front brake lever free play ...8-24
Checking the brake pedal position ............8-25
Adjusting the parking brake free play .......8-26
Brake light switches ..................................8-27
Adjusting the clutch lever free play ...........8-28
Drive chain slack .......................................8-29
Lubricating the drive chain ........................8-31
U33B70E0.book Page 2 Wednesday, June 11, 2008 1:38 PM

1-1
1
EBU17430
SAFETY INFORMATION
EBU17592AN ATV IS NOT A TOY AND CAN BE HAZARD-OUS TO OPERATE.An ATV handles differently from other vehicles, in-
cluding motorcycles and cars. A collision or roll-
over can occur quickly, even during routine
maneuvers such as turning and riding on hills or
over obstacles, if you fail to take proper precau-
tions.
SEVERE INJURY OR DEATH can result if you do
not follow these instructions:
Read this manual and all labels carefully and fol-
low the operating procedures described.
Never operate an ATV without proper training or
instruction.
Always follow the age recommendation:
– A child under 16 years old should never oper-
ate an ATV with engine size greater than 90 cc.
Never allow a child under age 16 to operate an
ATV without adult supervision, and never allow
continued use of an ATV by a child if he or she
does not have the abilities to operate it safely.

Never carry a passenger on an ATV.
Always avoid operating an ATV on any paved
surfaces, including sidewalks, driveways, park-
ing lots and paved streets.
Never operate an ATV on any paved street,
paved road or motorway.
Watch carefully for other vehicles when operat-
ing on unpaved public streets or roads. Make
sure you know your country’s laws and regula-
tions before you ride on unpaved public streets
or roads.
Never operate an ATV without wearing an ap-
proved motorcycle helmet that fits properly. You
should also wear eye protection (goggles or face
shield), gloves, boots, a long-sleeved shirt or a
jacket, and long pants.
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.
U33B70E0.book Page 1 Wednesday, June 11, 2008 1:38 PM

1-3
1 speed when climbing a hill. If you stall or roll
backwards, follow the special procedure for
braking described in this manual. Dismount on
the uphill side or to a side if pointed straight up-
hill. Turn the ATV around and remount, following
the procedure described in this manual.

Always check for obstacles before operating in a
new area.
Never attempt to operate over large obstacles,
such as large rocks or fallen trees. Always follow
proper procedures when operating over obsta-
cles as described in this manual.
Always be careful when skidding or sliding.
Learn to safely control skidding or sliding by
practicing at low speeds and on level, smooth
terrain. On extremely slippery surfaces, such as
ice, go slowly and be very cautious in order to re-
duce the chance of skidding or sliding out of con-
trol.
Never operate an ATV in fast flowing water or in
water deeper than that recommended in this
manual. Remember that wet brakes may have
reduced stopping ability. Test your brakes after
leaving water. If necessary, apply them several
times to let friction dry out the linings.

Always use the size and type of tires specified in
this manual.
Always maintain proper tire pressure as de-
scribed in this manual.
Never modify an ATV through improper installa-
tion or use of accessories.
Never exceed the stated load capacity for an
ATV. Cargo should be properly distributed and
securely attached. Reduce speed and follow in-
structions in this manual for carrying cargo or
pulling a trailer. Allow greater distance for brak-
ing.
WARNING
EWB00061
Always turn off the engine when refueling.
Do not refuel right after the engine has been
running and is still very hot.
Do not spill gasoline on the engine or ex-
haust pipe/muffler when refueling. Never re-
fuel while smoking, or in the vicinity of
sparks, open flames, or other sources of ig-
nition such as the pilot lights of water heat-
ers and clothes dryers. Gasoline can catch
fire and you could be burned.
U33B70E0.book Page 3 Wednesday, June 11, 2008 1:38 PM

1-4
1

When transporting the ATV in another vehi-
cle, be sure it is kept upright and that the fuel
cock is in the “OFF” position. Otherwise, fuel
may leak out of the carburetor or fuel tank.
Gasoline is poisonous. If you should swal-
low some gasoline or inhale a lot of gasoline
vapor, or get some gasoline in your eyes,
seek medical help immediately. If gasoline
spills on your skin, wash with soap and wa-
ter. If gasoline spills on your clothing,change your clothes.
WARNING
EWB00070Always operate your ATV in an area with ade-
quate ventilation. Never start or run the engine
in a closed area. Exhaust fumes are poisonous
and may cause loss of consciousness anddeath within a short time.
U33B70E0.book Page 4 Wednesday, June 11, 2008 1:38 PM

3-2
3
EBU17712Controls and instruments
TIPThe ATV you have purchased may differ slightlyfrom the figures shown in this manual.
1. Clutch lever
2. Handlebar switches
3. Speedometer unit
4. Parking brake lever
5. Main switch
6. Engine stop switch
7. Throttle lever
8. Brake lever
1
4 2
3
5
7
6
8
U33B70E0.book Page 2 Wednesday, June 11, 2008 1:38 PM

4-1
4
EBU17732
INSTRUMENT AND CONTROL FUNCTIONS
EBUM0020Main switch The positions of the main switch are as follows:
ON
All electrical systems are supplied with power. The
auxiliary light, meter lighting and taillight come on
when the light switch is on, and the engine can be
started. The key cannot be removed.
OFF
All electrical systems are off. The key can be re-
moved.
1. Main switch
OFF ON
1
U33B70E0.book Page 1 Wednesday, June 11, 2008 1:38 PM

4-3
4
EBU18061Handlebar switches
EBU18080Engine stop switch“/”
Set this switch to “ ” before starting the engine.
The engine stop switch controls the ignition and
stops the engine when it is running. Use this switch
to stop the engine in an emergency situation. The
engine will not start or run when this switch is set
to “ ”.EBU18100Start switch“”
Push this switch to crank the engine with the start-
er.
1. Light switch “ / / ”
2. Start switch “ ”
3. Horn switch “ ”
4. Hazard switch “ ”
5. Turn signal switch “ / ”
12345
1. Engine stop switch “ / ”
U33B70E0.book Page 3 Wednesday, June 11, 2008 1:38 PM

4-4
4
NOTICEECB00050See the starting instructions on page 6-1 priorto starting the engine.EBU28061Light switch“//”
Set the switch to “ ” to turn on the high beam.
Set this switch to “ ” to turn on the low beam.
Set the switch to “ ” to turn off the headlight.NOTICEECB00030Do not use the headlight with the engine turned
off for an extended period of time, otherwise
the battery may discharge to the point that the
starter motor will not operate properly. If this
should happen, remove the battery and re-charge it.EBU27990Turn signal switch“/”
To signal a right-hand turn, push this switch
to “ ”. To signal a left-hand turn, push this switch
to “ ”. When released, the switch returns to the
center position. To cancel the turn signal lights,
push the switch in after it has returned to the center
position.
EBU18170Horn switch“”
Press the switch to sound the horn.EBUM0220Hazard switch“”
Turn this switch to “ ” to turn on the hazard lights
(simultaneous flashing of all turn signal lights).
The hazard lights are used in case of an emergen-
cy or to warn other drivers when your vehicle is
stopped where it might be a traffic hazard.NOTICEECB00860Do not use the hazard lights for an extended
length of time with the engine not running, oth-erwise the battery may discharge.EBU18280Throttle lever Once the engine is running, movement of the throt-
tle lever will increase the engine speed.
Regulate the speed of the ATV by varying the
throttle position. Because the throttle is spring-
loaded, the ATV will decelerate, and the engine will
return to an idle any time the hand is removed from
the throttle lever.
U33B70E0.book Page 4 Wednesday, June 11, 2008 1:38 PM

4-5
4
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.
WARNING
EWB00250Malfunction 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.
EBU18321Speed limiter Your ATV was delivered with an adjustable speed
limiter. The speed limiter keeps the throttle from
fully opening, even when the throttle lever is
pushed to the maximum.
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).
1. Throttle lever
1. Locknut
2. Adjusting screw
3. No more than 12 mm (0.47 in)
31
2
(a)(b)
U33B70E0.book Page 5 Wednesday, June 11, 2008 1:38 PM