ENGINE
3-12
2. Adjust:
•
Throttle grip free play
a. Loosen the locknut “1”.
b. Turn the adjuster “2” until the specified
throttle grip free play is obtained.
c. Tighten the locknut.
WARNING
EWA18470
After adjusting the throttle grip free play,
start the engine and turn the handlebar to the
right and to the left to ensure that this does
not cause the engine idling speed to change.
EAM30254
CHECKING THE SPARK PLUG
1. Remove:
•
Seat
•
Air scoop (left/right)
Refer to “GENERAL CHASSIS” on page 4-1.
•
Fuel tank “1”
Refer to “FUEL TANK” on page 7-1.
NOTICE
ECA24400
Do not use too much force to pull the hose.
TIP
Remove the fuel tank, turn this 180
clockwise,
and put it in the frame “2” as shown.
2. Remove:
•
Spark plug cap
•
Spark plug
Refer to “CAMSHAFT” on page 5-13.
NOTICE
ECA24410
In order not to allow the dirt accumulated
around the spark plug to drop from the spark
plug hole into the cylinder, clean it before re-
moving the spark plug.
3. Check:
•
Spark plug type
Wrong type
Replace.
4. Check:
•
Electrode
Damage/wear
Replace the spark plug.
•
Insulator
Abnormal color
Replace the spark plug.
Normal color is medium-to-light tan.
5. Clean:
•
Spark plug
(with a spark plug cleaner or a wire brush)
6. Measure:
•
Spark plug gap “a”
Out of specification
Adjust the spark plug
gap.
7. Install:
•
Spark plug
TIP
Before installing the spark plug, clean the spark
plug and gasket surface.
8. Install:
•
Spark plug cap
•
Fuel tank
•
Air scoop (left/right)
•
Seat
1
2
1
1
2
Manufacturer/model
NGK/LMAR8G
Spark plug gap
0.7–0.8 mm (0.028–0.031 in)
Spark plug
13 N·m (1.3 kgf·m, 9.6 lb·ft)
T
R
.
.
Содержание YZ450F 2021
Страница 6: ...EAM20162 YAMAHA MOTOR CORPORATION U S A YZ MOTORCYCLE LIMITED WARRANTY ...
Страница 10: ......
Страница 44: ...MOTORCYCLE CARE AND STORAGE 1 32 ...
Страница 61: ...TIGHTENING TORQUES 2 16 ...
Страница 62: ...CABLE ROUTING DIAGRAM 2 17 EAM20152 CABLE ROUTING DIAGRAM Frame and engine left side view ...
Страница 64: ...CABLE ROUTING DIAGRAM 2 19 Frame and engine right side view ...
Страница 66: ...CABLE ROUTING DIAGRAM 2 21 Handlebar front view ...
Страница 68: ...CABLE ROUTING DIAGRAM 2 23 Frame and engine top view ...
Страница 70: ...CABLE ROUTING DIAGRAM 2 25 Frame and battery top view ...
Страница 72: ...CABLE ROUTING DIAGRAM 2 27 Rear brake right side view ...
Страница 74: ...CABLE ROUTING DIAGRAM 2 29 ...
Страница 112: ...ELECTRICAL SYSTEM 3 36 ...
Страница 148: ...REAR BRAKE 4 34 system Refer to BLEEDING THE HYDRAULIC BRAKE SYSTEM on page 3 25 ...
Страница 188: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 5 2 EAM30507 LUBRICATION DIAGRAMS 1 Camshaft 2 Drive axle 3 Main axle ...
Страница 189: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 5 3 1 Connecting rod 2 Oil nozzle 3 Crankshaft ...
Страница 190: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 5 4 1 Exhaust camshaft 2 Intake camshaft 3 Oil filter element 4 Oil pump ...
Страница 191: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 5 5 1 Oil filter element 2 Oil pump 3 Oil strainer ...
Страница 206: ...CAMSHAFT 5 20 6 Install Cylinder head breather hose Spark plug Spark plug 13 N m 1 3 kgf m 9 6 lb ft T R ...
Страница 262: ...TRANSMISSION 5 76 ...
Страница 272: ...WATER PUMP 6 9 ...
Страница 282: ...THROTTLE BODY 7 9 ...
Страница 289: ...IGNITION SYSTEM 8 6 ...
Страница 290: ...ELECTRIC STARTING SYSTEM 8 7 EAM20143 ELECTRIC STARTING SYSTEM EAM30279 CIRCUIT DIAGRAM ...
Страница 294: ...CHARGING SYSTEM 8 11 EAM20144 CHARGING SYSTEM EAM30282 CIRCUIT DIAGRAM ...
Страница 297: ...CHARGING SYSTEM 8 14 ...
Страница 298: ...FUEL INJECTION SYSTEM 8 15 EAM20145 FUEL INJECTION SYSTEM EAM30284 CIRCUIT DIAGRAM ...
Страница 321: ...FUEL INJECTION SYSTEM 8 38 ...
Страница 322: ...FUEL PUMP SYSTEM 8 39 EAM20146 FUEL PUMP SYSTEM EAM30287 CIRCUIT DIAGRAM ...
Страница 352: ...SELF DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE 9 15 ...
Страница 362: ...CHASSIS 10 9 ...
Страница 364: ......
Страница 366: ......
Страница 368: ...YZ450FM 2021 WIRING DIAGRAM B2W 2819U 11_W D indd 2 2020 02 05 10 21 39 ...