FEATURES
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EAS4S81007
OUTLINE OF THE ABS
1 The Yamaha ABS (anti-lock brake system) features a dual electronic control system, which acts on
the front and rear brakes independently.
2 The ABS features a compact and lightweight design to help maintain the basic maneuverability of
the vehicle.
3 The hydraulic unit, which is the main component of the ABS, is centrally located on the vehicle to
increase mass centralization.
ABS layout
ABS
The operation of the Yamaha ABS brakes is the same as conventional brakes on other vehicles, with
a brake lever for operating the front brake and a brake pedal for operating the rear brake.
When wheel lock is detected during emergency braking, hydraulic control is performed by the
hydraulic system on the front and rear brakes independently.
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.
1. ABS warning light
2. ABS ECU (electronic control unit)
3. ABS motor relay
4. Hydraulic unit (HU)
5. Rear brake caliper
6. Rear wheel sensor
7. Rear wheel sensor rotor
8. Front brake caliper
9. Front wheel sensor
10.Front wheel sensor rotor
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