CHASSIS
10-2
on the rider’s feeling of an actual run and the cir-
cuit conditions.
The front fork setting includes the following three
factors:
1. Setting of air spring characteristics
•
Change the fork oil amount.
2. Setting of spring preload
•
Change the spring.
3. Setting of damping force
•
Change the compression damping force.
•
Change the rebound damping force.
The spring acts on the load and the damping
force acts on the cushion travel speed.
EAM30172
CHANGE IN AMOUNT AND
CHARACTERISTICS OF FORK OIL
Damping characteristic near the final stroke can
be changed by changing the fork oil amount.
WARNING
EWA19190
Adjust the oil amount in 5 cm³ (0.2 US oz, 0.2
Imp.oz) increments or decrements. Too
small oil amount causes the front fork to pro-
duce a noise at full rebound or the rider to
feel some pressure on his hands or body. Al-
ternatively, too large oil amount will cause
the air spring characteristics to have a ten-
dency to be stiffer with the consequent dete-
riorated performance and characteristics.
Therefore, adjust the front fork within the
specified range.
EAM30173
SETTING OF SPRING AFTER
REPLACEMENT
As the front fork setting can be easily affected by
the rear suspension, take care so that the front
and the rear are balanced (in position etc.) when
setting the front fork.
1. Use of soft spring
•
Change the rebound damping force.
Turn out one or two clicks.
•
Change the compression damping force.
Turn in one or two clicks.
TIP
Generally a soft spring gives a soft riding feeling.
Rebound damping tends to become stronger
and the front fork may sink deeply over a series
of gaps.
2. Use of stiff spring
•
Change the rebound damping force.
Turn in one or two clicks.
•
Change the compression damping force.
Turn out one or two clicks.
Recommended oil
Yamaha Suspension Oil S1
Standard oil amount
285 cm³ (9.64 US oz, 10.05
Imp.oz)
Extent of adjustment
260–365 cm³ (8.79–12.34 US oz,
9.17–12.87 Imp.oz)
A. Air spring characteristics in relation to oil
amount change
B. Load
C. Stroke
1. Max. oil amount
2. Standard oil amount
3. Min. oil amount
Summary of Contents for WR450F 2021
Page 5: ...EAM20093 YAMAHA MOTOR CORPORATION U S A WR MOTORCYCLE LIMITED WARRANTY...
Page 8: ......
Page 10: ......
Page 41: ...MULTI FUNCTION DISPLAY 1 29...
Page 62: ...ELECTRICAL SPECIFICATIONS 2 9 Radiator fan motor fuse 5 0 A Spare fuse 15 0 A...
Page 71: ...TIGHTENING TORQUES 2 18...
Page 72: ...CABLE ROUTING DIAGRAM 2 19 EAM20152 CABLE ROUTING DIAGRAM Frame and engine left side view...
Page 74: ...CABLE ROUTING DIAGRAM 2 21 Frame and engine right side view...
Page 76: ...CABLE ROUTING DIAGRAM 2 23 Handlebar front view...
Page 78: ...CABLE ROUTING DIAGRAM 2 25 Frame and engine top view...
Page 80: ...CABLE ROUTING DIAGRAM 2 27 Frame and battery top view...
Page 82: ...CABLE ROUTING DIAGRAM 2 29 Rear brake right side view...
Page 84: ...CABLE ROUTING DIAGRAM 2 31 Front brake front view and right side view...
Page 86: ...CABLE ROUTING DIAGRAM 2 33 Taillight top view and right side view...
Page 88: ...CABLE ROUTING DIAGRAM 2 35...
Page 205: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 5 3 1 Connecting rod 2 Oil nozzle 3 Crankshaft...
Page 207: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 5 5 1 Oil filter element 2 Oil pump 3 Oil strainer...
Page 286: ...WATER PUMP 6 9...
Page 296: ...THROTTLE BODY 7 9...
Page 299: ......
Page 300: ...IGNITION SYSTEM 8 1 EAM20142 IGNITION SYSTEM EAM30277 CIRCUIT DIAGRAM...
Page 304: ...ELECTRIC STARTING SYSTEM 8 5 EAM20143 ELECTRIC STARTING SYSTEM EAM30279 CIRCUIT DIAGRAM...
Page 310: ...CHARGING SYSTEM 8 11 EAM20144 CHARGING SYSTEM EAM30282 CIRCUIT DIAGRAM...
Page 313: ...CHARGING SYSTEM 8 14...
Page 314: ...SIGNALING SYSTEM 8 15 EAM20154 SIGNALING SYSTEM EAM30348 CIRCUIT DIAGRAM...
Page 318: ...LIGHTING SYSTEM 8 19 EAM20153 LIGHTING SYSTEM EAM30346 CIRCUIT DIAGRAM...
Page 321: ...LIGHTING SYSTEM 8 22...
Page 322: ...COOLING SYSTEM 8 23 EAM20155 COOLING SYSTEM EAM30350 CIRCUIT DIAGRAM...
Page 325: ...COOLING SYSTEM 8 26...
Page 326: ...FUEL INJECTION SYSTEM 8 27 EAM20145 FUEL INJECTION SYSTEM EAM30284 CIRCUIT DIAGRAM...
Page 351: ...FUEL INJECTION SYSTEM 8 52...
Page 352: ...FUEL PUMP SYSTEM 8 53 EAM20146 FUEL PUMP SYSTEM EAM30287 CIRCUIT DIAGRAM...
Page 386: ...SELF DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE 9 15...
Page 396: ...CHASSIS 10 9...
Page 398: ......
Page 400: ......