FEATURES
1-5
Useful terms
• Wheel speed:
The rotation speed of the front and rear wheels.
• Chassis speed:
The speed of the chassis.
When the brakes are applied, wheel speed and chassis speed are reduced. However, the chassis
travels forward by its inertia even though the wheel speed is reduced.
• Brake force:
The force applied by braking to reduce the wheel speed.
• Wheel lock:
A condition that occurs when the rotation of one or both of the wheels has stopped, but the vehicle
continues to travel.
• Side force:
The force on the tires which supports the vehicle when cornering.
• 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”.
Slip ratio =
Chassis speed –
Wheel speed
×
100 (%)
Chassis speed
Summary of Contents for Vmax VMX17C 2009
Page 1: ...2009 SERVICE MANUAL VMX17Y C LIT 11616 22 64 2S3 28197 10 ...
Page 6: ......
Page 8: ......
Page 52: ...SPECIAL TOOLS 1 43 ...
Page 85: ...LUBRICATION POINTS AND LUBRICANT TYPES 2 32 ...
Page 90: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 37 1 4 5 2 3 ...
Page 92: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 39 A 2 A 4 3 2 1 ...
Page 94: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 41 A A 1 A A 7 6 8 5 4 3 2 ...
Page 98: ...COOLING SYSTEM DIAGRAMS 2 45 6 1 2 3 4 5 2 3 4 5 7 6 8 9 A B C F E D ...
Page 102: ...CABLE ROUTING 2 49 A B B A B B A B C D E F F H I 1 2 3 4 4 5 6 7 8 G 6 ...
Page 106: ...CABLE ROUTING 2 53 A B 7 1 2 3 4 5 6 12 11 13 F E D 10 C G 14 9 8 ...
Page 110: ...CABLE ROUTING 2 57 A A A B D E F H 1 2 2 3 4 3 5 6 7 8 9 C 4 5 G ...
Page 114: ...CABLE ROUTING 2 61 A A A A A B C 1 2 3 4 5 6 7 8 9 10 11 ...
Page 120: ...CABLE ROUTING 2 67 B A C C B A C C A B C D E F G H I J 1 2 1 2 5 1 2 3 5 3 4 5 ...
Page 124: ...CABLE ROUTING 2 71 ...
Page 127: ......
Page 270: ...SHAFT DRIVE 4 105 ...
Page 316: ...GENERATOR AND STARTER CLUTCH 5 43 a 1 ...
Page 364: ...CONNECTING RODS AND PISTONS 5 91 a ...
Page 390: ...MIDDLE GEAR 5 117 ...
Page 406: ...WATER PUMP 6 15 ...
Page 425: ...THROTTLE BODIES 7 18 1 ...
Page 426: ...AIR INDUCTION SYSTEM 7 19 EAS27040 AIR INDUCTION SYSTEM A A 6 5 4 5 6 1 4 3 3 2 1 A B C D ...
Page 433: ......
Page 439: ...IGNITION SYSTEM 8 6 ...
Page 445: ...ELECTRIC STARTING SYSTEM 8 12 ...
Page 447: ...CHARGING SYSTEM 8 14 1 AC magneto 2 Rectifier regulator 6 Main fuse 8 Battery 9 Frame ground ...
Page 449: ...CHARGING SYSTEM 8 16 ...
Page 461: ...SIGNALING SYSTEM 8 28 ...
Page 465: ...COOLING SYSTEM 8 32 ...
Page 501: ...FUEL INJECTION SYSTEM 8 68 ...
Page 505: ...FUEL PUMP SYSTEM 8 72 ...
Page 509: ...ABS ANTI LOCK BRAKE SYSTEM 8 76 ...
Page 549: ...ABS ANTI LOCK BRAKE SYSTEM 8 116 ...
Page 552: ...ELECTRICAL COMPONENTS 8 119 3 4 5 6 2 1 7 8 9 10 11 12 13 14 15 16 17 18 19 ...
Page 574: ...ELECTRICAL COMPONENTS 8 141 ...
Page 581: ......
Page 582: ...YAMAHA MOTOR CO LTD 2500 SHINGAI IWATA SHIZUOKA JAPAN ...