Husqvarna 401 Vitpilen - Owner's Manual > Antilock brake system (ABS)

The ABS module 1, which consists of a hydraulic unit, ABS control unit, and return pump, is installed under the fuel tank.

One wheel speed sensor 2 is located in each case on the front and the rear wheel.

Warning

Danger of accidents Changes to the vehicle impair the function of the ABS.

• Only allow the rear wheel to spin with the front brake applied if the ABS is switched off (burn out).
• Do not make any changes to the suspension travel.
• Only use spare parts on the brake system which have been approved and recommended by Husqvarna Motorcycles.
• Only use tires/wheels approved by Husqvarna Motorcycles with the corresponding speed index.
• Maintain the specified tire air pressure.
• Service work and repairs must be performed properly.

  (Your authorized Husqvarna Motorcycles workshop will be glad to help.)

The ABS is a safety system that prevents locking of the wheels when driving straight ahead without the influence of lateral forces.

Warning

Danger of accidents Driving aids can only prevent a rollover within the physical limitations.

It is not always possible to compensate for extreme riding situations, for example with luggage loaded with a high center of gravity, varying road surfaces, steep descents or full braking without disengaging the gear.

• Adapt your riding style to the road conditions and your driving ability.

The ABS operates with two independent brake circuits (front and rear brakes). During normal operation, the brake system operates like a conventional brake system without ABS. When the ABS control unit detects a locking tendency in a wheel, ABS begins regulating the brake pressure. The control function causes a slight pulsing of the hand and foot brake levers.

The ABS warning lamp 3 must light up after the ignition is switched on and go out after starting off. If it does not go out after starting off or if it lights up while riding, this indicates a fault in the ABS. In this case, the ABS is no longer enabled and the wheels may lock during braking. The brake system itself stays functional; only ABS control is not available.

The ABS warning lamp may also light up if the rotating speeds of the front and rear wheels differ greatly under extreme riding conditions, for example when making "wheelies" or if the rear wheel spins. This causes the ABS to switch off.

To reactivate the ABS, stop the vehicle and switch off the ignition.

The ABS is reactivated when the vehicle is switched on again. The ABS warning lamp goes out when you start off.

Checking the brake discs

Warning

Danger of accidents Worn-out brake discs reduce the braking effect.

• Make sure that worn-out brake discs are replaced immediately. (Your authorized Husqvarna Motorcycles workshop will be glad to help.)

• Check the front and rear brake disc thickness at multiple points for the dimension A.

Info

Wear will reduce the thickness of the brake disc at contact surface 1 of the brake linings.

If the brake disc thickness is less than the specified value.

• Change the front brake disc.
• Change the rear brake disc.

• Check the front and rear brake discs for damage, cracking, and deformation.

If the brake disc exhibits damage, cracking, or deformation:

• Change the front brake disc.
• Change the rear brake disc.

See also: