Page 16 of 142
1-6
1
******
*** kW *** kg1
23
YAMAHA MOTOR CO., LTD.
2500 SHINGAI, IWATA, JAPAN
****1This pictogram shows trailer Hitch Tow
weight limit. (Combined weight of the trailer
and all cargo in the trailer.)
Overloading can cause loss of control.
Loss of control can result in severe injury or
death.
This pictogram shows trailer Hitch Tongue
weight limit. (Weight on the trailer tongue.)
Overloading can cause loss of control.
Loss of control can result in severe injury or
death.
1
2
3Model Name
Max. Power
Mass In Running Order
1
Year of construction
U1BT61E0.book Page 6 Tuesday, April 6, 2010 1:28 PM
Page 19 of 142
1-9
1
WARNING
OPERATING TIRE PRESSURE : Set with tires cold
Recommended
: Front
: 27.5
kPa,
Rear
: 27.5
kPa,
Minimum
: Front
: 24.5
kPa,
Rear
: 24.5
kPa,
Never set tire pressure below minimum.
It could cause the tire to dislodge from the rim.LOADINGMaximum weight capacity:
100 kg,(220 lbs).
Includes weight of operator, cargo and accessories.Improper tire pressure or overloading can cause
loss of control.
Loss of control can result in severe injury or
death.
4.0 psi
4.0 psi
3.6 psi
3.6 psi(
()
()
())
4D3-2816M-00
4AA-22259-40
4AA-22259-40
4 5 YFM250RSEA
6
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Page 21 of 142

2-2
2
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 low
speeds 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-
nique described in this manual on level ground.
Avoid crossing the side of a steep hill if possible.Always use proper procedures if you stall or roll
backwards when climbing a hill. To avoid stall-
ing, use the proper gear and maintain a steady
U1BT61E0.book Page 2 Tuesday, April 6, 2010 1:28 PM
Page 38 of 142
4-13
4
EBU18992Adjusting the front shock absorber as-
semblies (YFM25RA/YFM250RA)The spring preload can be adjusted to suit the rid-
er’s weight and the riding conditions.
WARNING
EWB00400Always adjust the shock absorber assemblies
on the left and right side to the same setting.
Uneven adjustment can cause poor handling
and loss of stability, which could lead to an ac-
cident.
Adjust the spring preload as follows.
Turn the spring preload adjusting ring in direction
(a) to increase the spring preload and thereby
harden the suspension, and in direction (b) to de-
crease the spring preload and thereby soften the
suspension.TIPA special wrench can be obtained at a Yamaha
dealer to make this adjustment.
1. Projection
2. Seat holder
1
2
1. Spring preload adjusting ring
2. Special wrench
3. Position indicator
1
2
3
4
5
(a)
(b)1
2
3
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4-18
4
WARNING
EWB00410These shock absorber assemblies contain
highly pressurized nitrogen gas. Read and un-
derstand the following information before han-
dling the shock absorber assemblies.Do not tamper with or attempt to open the
cylinder assemblies.Do not subject the shock absorber assem-
blies to an open flame or other high heat
source. This may cause the unit to explode
due to excessive gas pressure.Do not deform or damage the cylinders in
any way. Cylinder damage will result in poor
damping performance.Do not dispose of a damaged or worn out
shock absorber assembly yourself. Take the
shock absorber assembly to a Yamaha deal-
er for any service.EBU28243Adjusting the rear shock absorber as-
sembly (YFM25RA/YFM250RA)The spring preload can be adjusted to suit the rid-
er’s weight and the riding conditions.
1. Compression damping force adjusting screw (for slow
compression damping)Compression damping setting (for slow com-
pression damping):
Minimum (soft):
16 click(s) in direction (b)*
Standard:
10 click(s) in direction (b)*
Maximum (hard):
1 click(s) in direction (b)*
* With the adjusting screw fully turned in di-
rection (a)
(b)(a)
1
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4-20
4
WARNING
EWB00450This shock absorber assembly contains highly
pressurized nitrogen gas. If the shock absorb-
er assembly is damaged, it could explode
causing injury or property damage. Shock ab-
sorber cylinder damage could also result in
poor handling which could cause an accident.Do not tamper with or attempt to open the
cylinder assembly.Do not subject the shock absorber assembly
to an open flame or other high heat.Do not deform or damage the cylinder in any
way.Do not dispose of a damaged or worn out
shock absorber assembly yourself. Take the
shock absorber assembly to a Yamaha deal-
er for any service.
EBU29312Adjusting the rear shock absorber as-
sembly (YFM25RSEA/YFM250RSEA)The spring preload, rebound damping and com-
pression damping forces of the rear shock absorb-
er assembly can be adjusted to suit the rider’s
weight and the riding conditions.
WARNING
EWB02500Suspension components become hot during
operation. Never touch the compression
damping force adjusting screw, the rebound
damping force adjusting dial or the oil reser-
voir with your bare hand or skin until suspen-
sion components have cooled.NOTICEECB00090Never turn an adjusting mechanism beyond
the minimum and maximum settings.Spring preload
1. Loosen the locknut. Tightening torque:
Locknut:
42 Nm (4.2 m·kgf, 30 ft·lbf)
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Page 63 of 142

6-8
6 er, you must use common sense and good
judgment as the stability and handling of an ATV
can be changed. When adding accessories, keep
the following points in mind:
Never exceed the weight limits shown. An over-
loaded ATV can be unstable.If you are carrying cargo and towing a trailer, in-
clude the tongue weight in the maximum ATV
load limit.Load cargo on the carriers as close to the center
of the ATV as possible. Put cargo at the rear of
the front carrier, at the front of the rear carrier,
and center it.Tie down cargo securely to the carriers. Make
sure cargo in the trailer cannot move around. A
shifting load can cause an accident.Make sure the load does not interfere with con-
trols or your ability to see where you are going.Ride more slowly than you would without a load.
The more weight you carry, the slower you
should go. Although conditions vary, it is goodpractice not to exceed 2nd gear whenever you
are carrying heavier loads or when towing a trail-
er.
Allow more braking distance. A heavier ATV
takes longer to stop.Avoid making sharp turns unless at very slow
speeds.Avoid hills and rough terrain. Choose terrain
carefully. Added weight affects the stability and
handling of the ATV. MAXIMUM LOADING LIMIT
ATV loading limit (total weight of rider, cargo,
accessories, and tongue):
100.0 kg (220 lb)
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Page 69 of 142

7-6
7 opening, even when the throttle lever is pushed to
the maximum. Turning in the adjusting screw limits
the maximum engine power available and de-
creases the maximum speed of the ATV. Turning
in the adjusting screw decreases top speed, and
turning it out increases top speed. (See page 4-4.)
Loading and accessories
WARNING
EWB00971Improper loading or towing can increase the
risk of loss of control, an overturn, or other ac-
cident. To reduce the risk of an accident:
Do not exceed the maximum loading limits
for the vehicle (see box in this section or ve-
hicle labeling).Make sure the load does not interfere with
your control or ability to see where you are
going.Reduce speed and allow more room to stop.
A heavier vehicle takes longer to stop.Avoid hills and rough terrain. Choose terrain
carefully. Use extreme caution when towing
or carrying a load on inclines.Turn gradually and go slowly.As originally equipped, this ATV is not designed to
carry cargo or tow a trailer. If you choose to add ac-
cessories to carry cargo, you must use common
sense and good judgment.
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.
1. Adjusting screw
2. Locknut
2
1
MAXIMUM LOADING LIMIT
ATV loading limit (total weight of cargo, rider,
accessories, and tongue):
100.0 kg (220 lb)
U1BT61E0.book Page 6 Tuesday, April 6, 2010 1:28 PM