FEATURES
1-7
• Slip ratio:
When the brakes are applied, slipping occurs between the tires and the road surface. This causes a
difference between the wheel speed and the chassis speed.
Slip ratio is the value that shows the rate of wheel slippage and is defined by the following formula.
0%: There is no slipping between the wheel and the road surface. The chassis speed is equal to the
wheel speed.
100%: The wheel speed is “0”, but the chassis is moving (i.e., wheel lock).
Brake force and vehicle stability
When the brake pressure is increased, wheel speed is reduced. Slipping occurs between the tire and
the road surface and brake force is generated. The limit of this brake force is determined by the friction
force between the tire and the road surface and is closely related to wheel slippage. Wheel slippage is
represented by the slip ratio.
Side force is also closely related to wheel slippage. See figure “A”. If the brakes are applied while keep-
ing the proper slip ratio, it is possible to obtain the maximum brake force without losing much side force.
ABS allows full use of the tires’ capabilities even on slippery road surfaces or less slippery road surfac-
es. See figure “B”.
Wheel slip and hydraulic control
The ABS ECU calculates the wheel speed of each wheel according to the rotation signal received from
the front and rear wheel sensors. In addition, the ABS ECU calculates the vehicle chassis speed and
the rate of speed reduction based on the wheel speed values.
Slip ratio =
Chassis speed –
Wheel speed
×
100 (%)
Chassis speed
b
c
a
A
d
a
e
f
g
d
B
a. Friction force between the tire and road
surface
b. Brake force
c. Side force
d. Slip ratio (%)
e. Less slippery road surface
f.
Controlling zone
g. Slippery road surface
Summary of Contents for FJR13AY 2009
Page 1: ...2009 SERVICE MANUAL FJR13AY C FJR13AEY C LIT 11616 22 73 3P6 28197 12 ...
Page 6: ......
Page 8: ......
Page 80: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 31 EAS20410 LUBRICATION DIAGRAMS 5 6 7 1 2 3 4 ...
Page 82: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 33 1 3 2 ...
Page 83: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 34 1 Main axle 2 Drive axle 3 Oil delivery pipe 1 ...
Page 84: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 35 6 5 4 3 2 1 ...
Page 86: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 37 1 2 3 4 5 6 7 8 9 ...
Page 88: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 39 4 5 3 2 1 9 8 6 7 ...
Page 92: ...COOLING SYSTEM DIAGRAMS 2 43 A A 7 1 2 3 4 5 5 7 8 6 8 9 10 11 12 ...
Page 98: ...CABLE ROUTING FJR13A 2 49 2 3 4 5 6 7 8 9 11 10 12 13 14 15 16 A B C D E F 1 1 ...
Page 100: ...CABLE ROUTING FJR13A 2 51 1 2 3 4 5 6 7 8 A B C D E 9 10 11 12 13 ...
Page 108: ...CABLE ROUTING FJR13A 2 59 1 2 3 4 A B B C D E ...
Page 110: ...CABLE ROUTING FJR13A 2 61 A 1 A A B P O C D E F G H I J K L M N 2 3 4 5 6 7 8 9 10 A 11 ...
Page 118: ...CABLE ROUTING FJR13AE 2 69 2 3 4 5 6 7 8 9 11 12 13 14 15 16 17 A B C E D F 1 1 H 10 18 G ...
Page 120: ...CABLE ROUTING FJR13AE 2 71 1 2 3 4 5 6 7 8 A B C D E 9 10 11 12 13 ...
Page 128: ...CABLE ROUTING FJR13AE 2 79 1 4 2 5 6 A B C D D E 3 F G ...
Page 130: ...CABLE ROUTING FJR13AE 2 81 A 1 A A B P O C D E F G H I J K L M N 2 3 4 5 6 7 8 9 10 A 11 ...
Page 134: ...CABLE ROUTING FJR13AE 2 85 ...
Page 137: ......
Page 196: ...GENERAL CHASSIS 4 11 b a 1 2 ...
Page 302: ...SHAFT DRIVE 4 117 ...
Page 326: ...CAMSHAFTS 5 21 ...
Page 424: ...CONNECTING RODS AND PISTONS 5 119 ...
Page 462: ...WATER PUMP 6 15 ...
Page 473: ...THROTTLE BODIES 7 10 ...
Page 474: ...AIR INDUCTION SYSTEM 7 11 EAS27040 AIR INDUCTION SYSTEM 1 2 3 4 5 1 1 1 1 2 2 5 2 3 3 4 7 8 6 ...
Page 483: ......
Page 495: ...IGNITION SYSTEM 8 12 ...
Page 511: ...ELECTRIC STARTING SYSTEM 8 28 ...
Page 513: ...CHARGING SYSTEM 8 30 2 Rectifier regulator 3 AC magneto 8 Main fuse 10 Battery ...
Page 515: ...CHARGING SYSTEM 8 32 ...
Page 539: ...COOLING SYSTEM 8 56 ...
Page 587: ...FUEL PUMP SYSTEM 8 104 ...
Page 599: ...ACCESSORY BOX SYSTEM 8 116 ...
Page 609: ...ABS ANTI LOCK BRAKE SYSTEM 8 126 ...
Page 698: ...ELECTRICAL COMPONENTS 8 215 FJR13A 5 1 3 2 17 8 10 11 12 13 14 15 16 7 6 4 9 ...
Page 700: ...ELECTRICAL COMPONENTS 8 217 FJR13AE 13 16 18 17 2 3 4 5 6 7 8 1 9 10 11 12 15 14 19 ...
Page 702: ...ELECTRICAL COMPONENTS 8 219 FJR13AE 1 19 3 2 5 7 9 8 12 13 14 15 16 11 10 18 17 6 4 ...
Page 730: ...ELECTRICAL COMPONENTS 8 247 ...
Page 739: ......
Page 740: ...YAMAHA MOTOR CO LTD 2500 SHINGAI IWATA SHIZUOKA JAPAN ...