CHASSIS
10-7
EAM30180
SUSPENSION SETTING (REAR SHOCK ABSORBER)
TIP
•
If any of the following symptoms is experienced with the standard position as the base, make resetting
by reference to the adjustment procedure given in the same chart.
•
Adjust the rebound damping in 2-click increments or decrements.
•
Adjust the low compression damping in 1-click increments or decrements.
•
Adjust the high compression damping in 1/6 turn increments or decrements.
Low front, tend-
ing to lower front
posture
Compression
damping force
Turn adjuster clockwise (about 2
clicks) to increase damping.
Rebound damp-
ing force
Turn adjuster counterclockwise
(about 2 clicks) to decrease
damping.
Balance with rear
end
Set sunken length for 95–100
mm (3.7–3.9 in) when one pas-
senger is astride seat (lower rear
posture).
Oil amount
Increase oil amount by about 5
cm³ (0.2 US oz, 0.2 Imp.oz).
“Obtrusive” front,
tending to upper
front posture
Compression
damping force
Turn adjuster counterclockwise
(about 2 clicks) to decrease
damping.
Balance with rear
end
Set sunken length for 90–95 mm
(3.5–3.7 in) when one passenger
is astride seat (upper rear pos-
ture).
Spring
Replace with soft spring.
Oil amount
Decrease oil amount by about 5–
10 cm³ (0.2–0.3 US oz, 0.2–0.4
Imp.oz).
Symptom
Section
Check
Adjust
Jump
Large
gap
Medium
gap
Small
gap
Stiff, tending to
sink
Rebound damp-
ing force
Turn adjuster counterclockwise
(about 2 clicks) to decrease
damping.
Spring set length
Set sunken length for 90–100
mm (3.5–3.9 in) when one pas-
senger is astride seat.
Spongy and
unstable
Rebound damp-
ing force
Turn adjuster clockwise (about 2
clicks) to increase damping.
Low compres-
sion damping
Turn adjuster clockwise (about 1
click) to increase damping.
Spring
Replace with stiff spring.
Symptom
Section
Check
Adjust
Jump
Large
gap
Medium
gap
Small
gap
Summary of Contents for YZ450F 2021
Page 6: ...EAM20162 YAMAHA MOTOR CORPORATION U S A YZ MOTORCYCLE LIMITED WARRANTY ...
Page 10: ......
Page 44: ...MOTORCYCLE CARE AND STORAGE 1 32 ...
Page 61: ...TIGHTENING TORQUES 2 16 ...
Page 62: ...CABLE ROUTING DIAGRAM 2 17 EAM20152 CABLE ROUTING DIAGRAM Frame and engine left side view ...
Page 64: ...CABLE ROUTING DIAGRAM 2 19 Frame and engine right side view ...
Page 66: ...CABLE ROUTING DIAGRAM 2 21 Handlebar front view ...
Page 68: ...CABLE ROUTING DIAGRAM 2 23 Frame and engine top view ...
Page 70: ...CABLE ROUTING DIAGRAM 2 25 Frame and battery top view ...
Page 72: ...CABLE ROUTING DIAGRAM 2 27 Rear brake right side view ...
Page 74: ...CABLE ROUTING DIAGRAM 2 29 ...
Page 112: ...ELECTRICAL SYSTEM 3 36 ...
Page 148: ...REAR BRAKE 4 34 system Refer to BLEEDING THE HYDRAULIC BRAKE SYSTEM on page 3 25 ...
Page 189: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 5 3 1 Connecting rod 2 Oil nozzle 3 Crankshaft ...
Page 191: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 5 5 1 Oil filter element 2 Oil pump 3 Oil strainer ...
Page 262: ...TRANSMISSION 5 76 ...
Page 272: ...WATER PUMP 6 9 ...
Page 282: ...THROTTLE BODY 7 9 ...
Page 289: ...IGNITION SYSTEM 8 6 ...
Page 290: ...ELECTRIC STARTING SYSTEM 8 7 EAM20143 ELECTRIC STARTING SYSTEM EAM30279 CIRCUIT DIAGRAM ...
Page 294: ...CHARGING SYSTEM 8 11 EAM20144 CHARGING SYSTEM EAM30282 CIRCUIT DIAGRAM ...
Page 297: ...CHARGING SYSTEM 8 14 ...
Page 298: ...FUEL INJECTION SYSTEM 8 15 EAM20145 FUEL INJECTION SYSTEM EAM30284 CIRCUIT DIAGRAM ...
Page 321: ...FUEL INJECTION SYSTEM 8 38 ...
Page 322: ...FUEL PUMP SYSTEM 8 39 EAM20146 FUEL PUMP SYSTEM EAM30287 CIRCUIT DIAGRAM ...
Page 352: ...SELF DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE 9 15 ...
Page 362: ...CHASSIS 10 9 ...
Page 364: ......
Page 366: ......
Page 368: ...YZ450FM 2021 WIRING DIAGRAM B2W 2819U 11_W D indd 2 2020 02 05 10 21 39 ...