2010 YAMAHA YFZ450R ABS

EBU17421
TABLE OF CONTENTS
LOCATION OF THE WARNING AND
SPECIFICATION LABELS .............................. 1-1
SAFETY INFORMATION ................................ 2-1
DESCRIPTION................................................ 3-1Left view ...................................................... 3-1
Right view.................................................... 3-2
Controls and instruments............................ 3-2
INSTRUMENT AND CONTROL
FUNCTIONS ................................................... 4-1 Main switch ................................................. 4-1
Indicator light and warning lights ................ 4-2
Handlebar switches .................................... 4-3
Throttle lever ............................................... 4-4
Speed limiter ............................................... 4-5
Clutch lever ................................................. 4-5
Brake lever .................................................. 4-6
Brake pedal ................................................. 4-6
Parking brake lever ..................................... 4-7
Shift pedal ................................................... 4-8
Fuel tank cap............................................... 4-8
Fuel ............................................................. 4-9 Seat .......................................................... 4-10
Adjusting the front shock absorber
assemblies .............................................. 4-11
Adjusting the rear shock absorber assembly ................................................ 4-16
Handlebar position ................................... 4-24
PRE-OPERATION CHECKS .......................... 5-1 Fuel ............................................................. 5-4
Engine oil .................................................... 5-4
Coolant ....................................................... 5-4
Front and rear brakes ................................. 5-4
Throttle lever ............................................... 5-5
Drive chain .................................................. 5-5
Tires ............................................................ 5-5
Chassis fasteners ....................................... 5-7
Instruments, lights and switches ................ 5-8
OPERATION .................................................. 6-1 Starting the engine ..................................... 6-1
Shifting........................................................ 6-2
Engine break-in........................................... 6-4
Parking........................................................ 6-4
Parking on a slope ...................................... 6-5U1TD61E0.book Page 1 Tuesday, July 8, 2014 11:30 AM

3-1
3
EBU17681
DESCRIPTION
EBU17691Left view1. Front shock absorber assembly compression damping force adjusting bolt (for fast compression damping)
2. Front shock absorber assembly compression damping force adjusting screw (for slow compression damping)
3. Front shock absorber assembly spring preload adjusting nut
4. Engine oil tank filler cap
5. Rear brake fluid reservoir
6. Battery
7. Shift pedal
8. Coolant reservoir
9. Front shock absorber assembly rebound damping force adjusting screw
78
9 5
31
6
4
2
U1TD61E0.book Page 1 Tuesday, July 8, 2014 11:30 AM

3-2
3
EBU17701Right view
EBU17713Controls and instrumentsTIPThe ATV you have purchased may differ slightly
from the figures shown in this manual.
1. Spark arrester
2. Fuse
3. Rear shock absorber assembly spring preload adjusting nut
4. Rear shock absorber assembly compression damping force adjusting bolt (for fast compression damping)
5. Rear shock absorber assembly compression damping force adjusting screw (for slow compression damping)
6. Fuel tank cap
7. Oil filter element
8. Brake pedal
9. Rear brake light switch
10.Rear shock absorber assembly rebound damping force adjusting screw
789
1
2
3
4
5
10
6
1. Clutch lever
2. Parking brake lever
3. Handlebar switches
4. Main switch
5. Front brake fluid reservoir
6. Throttle lever
7. Brake lever
2
1
3
6
5
4
7
U1TD61E0.book Page 2 Tuesday, July 8, 2014 11:30 AM

4-11
4
To install the seat
Insert the projections on the front of the seat into
the seat holders and push down on the seat at the
rear. Make sure that the seat is securely fitted.
EBU30051Adjusting the front shock absorber as-
sembliesThese shock absorber assemblies are equipped
with a spring preload adjusting nut, a rebound
damping force adjusting screw, with a compres-
sion damping force adjusting bolt (for fast com-
pression damping), and a compression damping
force adjusting screw (for slow compression
damping).
1. Seat lock lever
1
1. Projection
2. Seat holder
1
2
U1TD61E0.book Page 11 Tuesday, July 8, 2014 11:30 AM

4-12
4
WARNING
EWB02492Suspension components become hot during
operation. Never touch the compression
damping force adjusting bolt and screw, the
rebound damping force adjusting screw or
the oil reservoir with your bare hand or skin
until suspension components have cooled.
 Always adjust the shock absorber assem-
blies 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 accident. NOTICEECB00091Never turn an adjusting mechanism beyond
the minimum and maximum settings. TIPAlthough the total number of clicks or turns of a
damping force adjusting mechanism may not ex-
actly match the following specifications due to
small differences in production, the actual number
of clicks or turns always represents the entire ad-
justing range. To obtain a precise adjustment, it would be advisable to check the number of clicks
or turns of each damping force adjusting mecha-
nism and to modify the specifications as neces-
sary.
Spring preload
1. Loosen the locknut.
2. Turn the spring preload adjusting nut in direc- tion (a) to increase the spring preload and
thereby harden the suspension, and in direc-
tion (b) to decrease the spring preload and
thereby soften the suspension.1. Locknut
2. Spring preload adjusting nut
3. Special wrench
(a)
(b) 2 1
3
U1TD61E0.book Page 12 Tuesday, July 8, 2014 11:30 AM

4-16
4
WARNING
EWB00411These 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.
EBU30142Adjusting the rear shock absorber as-
semblyThis shock absorber assembly is equipped with a
spring preload adjusting nut, a rebound damping
force adjusting screw, a compression damping
force adjusting bolt (for fast compression damp-
ing), and a compression damping force adjusting
screw (for slow compression damping).
WARNING
EWB02681Suspension components become hot during
operation. Never touch the compression
damping force adjusting bolt and screw, the
rebound damping force adjusting screw or the
oil reservoir with your bare hand or skin until
the suspension components have cooled.
Compression damping setting (for slow com-
pression damping):
Minimum (soft):20 click(s) in direction (b)*
Standard: 7 click(s) in direction (b)*
Maximum (hard): 1 click(s) in direction (b)*
* With the adjusting screw fully turned in di- rection (a)
U1TD61E0.book Page 16 Tuesday, July 8, 2014 11:30 AM

4-24
4
WARNING
EWB00431This shock absorber assembly contains highly
pressurized nitrogen gas. Read and under-
stand the following information before han-
dling the shock absorber assembly.
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 source.
This may cause the unit to explode due to ex-
cessive gas pressure.
 Do not deform or damage the cylinder 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. EBU29403Handlebar positionThe handlebar can be adjusted to one of two po-
sitions to suit the rider’s preference. Have a
Yamaha dealer adjust the position of the handle- bar.
1. Handlebar
1
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8-7
8
14*Drive chain roller • Check for wear and replace if necessary. √√√
15 *Chassis fasteners • Make sure that all nuts, bolts, and screws are
properly tightened. √√√√√
16 *Shock absorber as-
semblies • Check operation and correct if necessary.
• Check for oil leakage and replace if necessary.
√√√
17 *Rear suspension re-
lay arm and con-
necting arm
pivoting points • Check operation and correct if necessary.
√√√√
18 *Steering shaft • Lubricate with lithium-soap-based grease. √√√
19 *Steering system • Check operation and repair or replace if dam-
aged.
• Check toe-in and adjust if necessary. √√√√√
20 Engine oil • Change.
• Check ATV for oil leakage, and correct if neces-
sary. √ √√√
21 Engine oil filter ele-
ment
• Replace.
√√√
22 *Cooling system • Check coolant level and ATV for coolant leakage,
and correct if necessary. √√√√√
• Replace coolant. Every 2 years
NO. ITEM
CHECK OR MAINTENANCE
JOB INITIAL EVERY
Whichev-
er comes first month136612
km (mi) 320
(200) 1300
(800) 2500
(1600) 2500
(1600) 5000
(3200)
hours 20 80 160 160 320U1TD61E0.book Page 7 Tuesday, July 8, 2014 11:30 AM