2006 YAMAHA YZ450F lock

ILLUSTRATED SYMBOLS
(Refer to the illustration)
Illustrated symbols 1 to 7 are designed as
thumb tabs to indicate the chapter’s number
and content.
1General information
2Specifications
3Regular inspection and adjustments
4Engine
5Chassis
6Electrical
7Tuning
Illustrated symbols 8 to D are used to identify
the specifications appearing in the text.
8With engine mounted
9Special tool
0Filling fluid
ALubricant
BTightening
CSpecified value, Service limit
DResistance (
Ω), Voltage (V), Electric current (A)
Illustrated symbols E to H in the exploded
diagrams indicate grade of lubricant and loca-
tion of lubrication point.
EApply engine oil
FApply molybdenum disulfide oil
GApply lightweight lithium-soap base grease
HApply molybdenum disulfide grease
Illustrated symbols I to J in the exploded
diagrams indicate where to apply a locking
agent and where to install new parts.
IApply locking agent (LOCTITE®)
JUse new one 12
34
56
78
90
AB
CD
EF
GH
IJ
GEN
INFOSPEC
INSP
ADJ
ENG
CHAS–+ELEC
TUN
T R..
EM
BM
New

1 - 4
GEN
INFO
IMPORTANT INFORMATION
EC132000
ALL REPLACEMENT PARTS
1. We recommend to use Yamaha genuine
parts for all replacements. Use oil and/or
grease recommended by Yamaha for
assembly and adjustment.
EC133000
GASKETS, OIL SEALS AND O-RINGS
1. All gaskets, oil seals, and O-rings should
be replaced when an engine is overhauled.
All gasket surfaces, oil seal lips, and O-
rings must be cleaned.
2. Properly oil all mating parts and bearings
during reassembly. Apply grease to the oil
seal lips.
EC134000
LOCK WASHERS/PLATES AND COTTER
PINS
1. All lock washers/plates 1 and cotter pins
must be replaced when they are removed.
Lock tab(s) should be bent along the bolt or
nut flat(s) after the bolt or nut has been
properly tightened.
EC135001
BEARINGS AND OIL SEALS
1. Install the bearing(s) 1 and oil seal(s) 2
with their manufacturer’s marks or numbers
facing outward. (In other words, the
stamped letters must be on the side
exposed to view.) When installing oil
seal(s), apply a light coating of light-weight
lithium base grease to the seal lip(s). Oil
the bearings liberally when installing.
CAUTION:
Do not use compressed air to spin the
bearings dry. This causes damage to the
bearing surfaces.

GEN
INFO
SPEZIALWERKZEUGE
Die folgenden Spezialwerkzeuge sind für korrekte und vollständige Einstell- und Montagearbeiten
unerlässlich. Durch die Verwendung dieser Werkzeuge werden Beschädigungen vermieden, die
beim Gebrauch ungeeigneter Hilfsmittel oder improvisierter Techniken entstehen können. Die Aus-
führung und Teilenummer der Spezialwerkzeuge weicht je nach Bestimmungsland ab. Bei der
Bestellung von Spezialwerkzeugen sollten die im Folgenden aufgeführten Bezeichnungen und Tei-
lenummern angegeben werden.
HINWEIS:
Teilenummern für U.S.A. und Kanada beginnen mit “YM-”, “YU-” bzw. “ACC-”.
Teilenummern für alle anderen Länder beginnen mit “90890-”.
Teilenummer Werkzeug/Anwendung Abbildung
YU-3097, 90890-01252
YU-1256Messuhr und Ständer
Ständer
Zum Kontrollieren von Bauteilen auf Schlag und Ver-
biegung.YU-3097
YU-125690890-01252
YU-90050, 90890-01274
YU-90050, 90890-01275
YU-91044, 90890-04081
YU-90063, 90890-01278Kurbelwellen-Einbauwerkzeug
Kurbelwellen-Einbaufassung
Kurbelwellen-Einbauschraube
Kurbelwellen-Einbauhülse
Adapter (M12)
Zum Einbau der Kurbelwelle.YU-90050
YU-90063
YU-9104490890-01274
90890-01275
90890-01278
90890-04081
YU-1304, 90890-01304 Kolbenbolzen-Abzieher
Zum Ausbau des Kolbenbolzens.YU-1304 90890-01304
YU-24460-01, 90890-01325
YU-33984, 90890-01352Kühlerverschlussdeckel-Prüfgerät
Adapter
Zur Prüfung des Kühlsystems.YU-24460-01
YU-3398490890-01325
90890-01352
YM-04151, 90890-04151 Rotorabzieher
Zum Ausbau des Lichtmaschinenrotors.YM-04151 90890-04151
YU-33975, 90890-01403 Hakenschlüssel
Zum vorschriftsmäßigen Festziehen der Lenkkopf-
Ringmutter.YU-33975 90890-01403
YM-01500, 90890-01500 Abdeckschraubenschlüssel
Zum Lockern und Festziehen des Gabelventils.YM-01500 90890-01500
SPEZIALWERKZEUGE
1 - 7

GEN
INFO
YM-01501, 90890-01501 Abdeckschrauben-Ringschlüssel
Zum Lockern und Festziehen des Dämpferrohrs.YM-01501 90890-01501
YM-A0948, 90890-01502 Gabeldichtring-Treiber
Zum Einbau des Gabeldichtrings.YM-A0948 90890-01502
YU-3112-C, 90890-03112 Taschen-Multimeter
Zur Prüfung von Widerständen, Spannungen und
Stromstärken.YU-3112-C 90890-03112
YM-33277-A, 90890-03141 Stroboskoplampe
Zur Prüfung des Zündzeitpunktes.YM-33277-A 90890-03141
YM-4019, 90890-04019 Ventilfederspanner
Zum Aus- und Einbau der Ventile.YM-4019 90890-04019
YM-91042, 90890-04086 Kupplungshalter
Zum Festhalten der Kupplung beim Lösen und Fest-
ziehen der Kupplungsnaben-Mutter.YM-91042 90890-04086
YM-4116, 90890-04116
YM-4097, 90890-04097Ventilführungs-Austreiber
Einlass: 4,5 mm (0,18 in)
Auslass: 5,0 mm (0,20 in)
Zum Aus- und Einbau der Ventilführungen Zum Aus-
und Einbau der Ventilführungen.YM-4116
YM-409790890-04116
90890-04097
YM-4117, 90890-04117
YM-4098, 90890-04098Ventilführungs-Einbauhülse
Einlass
Auslass
Zum Einbau der Ventilführungen.YM-4117
YM-409890890-04117
90890-04098
YM-4118, 90890-04118
YM-4099, 90890-04099Ventilführungs-Reibahle
Einlass: 4,5 mm (0,18 in)
Auslass: 5,0 mm (0,20 in)
Zum Ausbohren neuer Ventilführungen.YM-4118
YM-409990890-04118
90890-04099
Teilenummer Werkzeug/Anwendung Abbildung
SPEZIALWERKZEUGE
1 - 8

1 - 19
GEN
INFO
CLEANING AND STORAGE
EC1B0000
CLEANING AND STORAGE
EC1B1000
CLEANING
Frequent cleaning of your machine will
enhance its appearance, maintain good overall
performance, and extend the life of many com-
ponents.
1. Before washing the machine, block off the
end of the exhaust pipe to prevent water
from entering. A plastic bag secured with a
rubber band may be used for this purpose.
2. If the engine is excessively greasy, apply
some degreaser to it with a paint brush. Do
not apply degreaser to the chain, sprock-
ets, or wheel axles.
3. Rinse the dirt and degreaser off with a gar-
den hose; use only enough pressure to do
the job.
CAUTION:
Excessive hose pressure may cause water
seepage and contamination of wheel bear-
ings, front forks, brakes and transmission
seals. Many expensive repair bills have
resulted from improper high pressure
detergent applications such as those avail-
able in coin-operated car washers.
4. After the majority of the dirt has been
hosed off, wash all surfaces with warm
water and a mild detergent. Use an old
toothbrush to clean hard-to-reach places.
5. Rinse the machine off immediately with
clean water, and dry all surfaces with a soft
towel or cloth.
6. Immediately after washing, remove excess
water from the chain with a paper towel
and lubricate the chain to prevent rust.
7. Clean the seat with a vinyl upholstery
cleaner to keep the cover pliable and
glossy.

1 - 20
GEN
INFO
CLEANING AND STORAGE
8. Automotive wax may be applied to all
painted or chromed surfaces. Avoid combi-
nation cleaner-waxes, as they may contain
abrasives.
9. After completing the above, start the
engine and allow it to idle for several min-
utes.
EC1B2001
STORAGE
If your machine is to be stored for 60 days or
more, some preventive measures must be
taken to avoid deterioration. After cleaning the
machine thoroughly, prepare it for storage as
follows:
1. Drain the fuel tank, fuel lines, and the car-
buretor float bowl.
2. Remove the spark plug, pour a tablespoon
of SAE 10W-30 motor oil in the spark plug
hole, and reinstall the plug. With the engine
stop switch pushed in, kick the engine over
several times to coat the cylinder walls with
oil.
3. Remove the drive chain, clean it thoroughly
with solvent, and lubricate it. Reinstall the
chain or store it in a plastic bag tied to the
frame.
4. Lubricate all control cables.
5. Block the frame up to raise the wheels off
the ground.
6. Tie a plastic bag over the exhaust pipe out-
let to prevent moisture from entering.
7. If the machine is to be stored in a humid or
salt-air environment, coat all exposed
metal surfaces with a film of light oil. Do not
apply oil to rubber parts or the seat cover.
NOTE:
Make any necessary repairs before the
machine is stored.

SPEC
2 - 6 Valve spring:
Free length IN 37.03 mm (1.46 in) 36.03 mm
(1.42 in)
EX 37.68 mm (1.48 in) 36.68 mm
(1.44 in)
Set length (valve closed) IN 27.87 mm (1.10 in) ----
EX 27.38 mm (1.08 in) ----
Compressed force (installed) IN 111.3 ~ 127.9 N at 27.87 mm
(11.3 ~ 13.0 kg at 27.87 mm,
24.91 ~ 28.66 lb at 1.10 in)----
EX 127.4 ~ 146.4 N at 27.38 mm
(13.0 ~ 14.9 kg at 27.38 mm,
28.66 ~ 32.85 lb at 1.08 in)----
Tilt limit IN ----
2.5°/1.61 mm
(2.5°/0.063 in)
EX ----2.5°/1.65 mm
(2.5°/0.065 in)
Direction of winding (top view) IN Clockwise ----
EX Clockwise ----
Piston:
Piston to cylinder clearance 0.040 ~ 0.065 mm
(0.0016 ~ 0.0026 in)0.1 mm
(0.004 in)
Piston size “D”94.945 ~ 94.960 mm
(3.738 ~ 3.739 in)----
Measuring point “H”8 mm (0.315 in) ----
Piston off-set 1 mm (0.0394 in) ----
Piston pin bore inside diameter 18.004 ~ 18.015 mm
(0.7088 ~ 0.7093 in)18.045 mm
(0.7104 in)
Piston pin outside diameter 17.991 ~ 18.000 mm
(0.7083 ~ 0.7087 in)17.971 mm
(0.7075 in) Item Standard Limit
H
D
MAINTENANCE SPECIFICATIONS

SPEC
2 - 11 Part to be tightened Thread size Q’tyTightening torque
Nm m·kg ft·lb
Spark plug M10S × 1.0 1 13 1.3 9.4
Camshaft cap M6 × 1.0 10 10 1.0 7.2
Cylinder head blind plug screw M12 × 1.0 1 28 2.8 20
Cylinder head (stud bolt) M8 × 1.25 1 15 1.5 11
(bolt) M10 × 1.25 4 Refer to NOTE.*
1
(bolt) M6 × 1.0 2 10 1.0 7.2
Cylinder head cover M6 × 1.0 2 10 1.0 7.2
Cylinder M6 × 1.0 1 10 1.0 7.2
Timing chain tensioner M6 × 1.0 2 10 1.0 7.2
Tensioner cap bolt M6 × 1.0 1 7 0.7 5.1
Timing chain guide (rear) M6 × 1.0 2 10 1.0 7.2
Exhaust pipe (nut) M8 × 1.25 1 13 1.3 9.4
(bolt) M8 × 1.25 1 24 2.4 17
Silencer M8 × 1.25 2 35 3.5 25
Silencer clamp M8 × 1.25 1 16 1.6 11
Exhaust pipe protector M6 × 1.0 3 10 1.0 7.2
Carburetor joint M6 × 1.0 3 10 1.0 7.2
Carburetor joint clamp M4 × 0.7 1 3 0.3 2.2
Air filter case M6 × 1.0 2 8 0.8 5.8
Air filter joint clamp M6 × 1.0 1 3 0.3 2.2
Air filter joint and air filter case M5 × 0.8 1 4 0.4 2.9
Throttle cable adjust bolt and locknut M6 × 0.75 1 4 0.4 2.9
Throttle cable (pull) M6 × 1.0 1 4 0.4 2.9
Throttle cable (return) M12 × 1.0 1 11 1.1 8.0
Throttle cable cover M5 × 0.8 2 4 0.4 2.9
Hot starter plunger M12 × 1.0 1 2 0.2 1.4
Hot starter cable adjust bolt and locknut M6 × 0.75 1 4 0.4 2.9
Air filter element M6 × 1.0 1 2 0.2 1.4
Radiator panel (upper) M6 × 1.0 2 10 1.0 7.2
Radiator M6 × 1.0 4 10 1.0 7.2
Radiator hose clamp M6 × 1.0 8 2 0.2 1.4
Radiator pipe 1, 2 M6 × 1.0 2 10 1.0 7.2
Impeller M8 × 1.25 1 14 1.4 10
Water pump housing cover M6 × 1.0 3 10 1.0 7.2
Coolant drain bolt M6 × 1.0 1 10 1.0 7.2
Oil pump cover M4 × 0.7 1 2 0.2 1.4
Oil pump M6 × 1.0 2 10 1.0 7.2
Engine oil drain bolt (oil filter) M6 × 1.0 1 10 1.0 7.2
Oil filter cover M6 × 1.0 2 10 1.0 7.2
Oil check bolt (cylinder head) M6 × 1.0 1 10 1.0 7.2
Oil hose clamp—220.21.4
Clutch cover M6 × 1.0 7 10 1.0 7.2
MAINTENANCE SPECIFICATIONS