KTM 890 Duke R - Owner's Manual > Anti-lock braking system (ABS)

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 away from public road traffic if the ABS is switched off.
• Do not make any changes to the suspension travel.
• Only use spare parts on the brake system which have been approved and recommended by KTM.
• Only use tires/wheels approved by KTM with the corresponding speed index.
• Maintain specified tire pressure.
• Ensure that service work and repairs are performed professionally. (Your authorized KTM 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 after starting 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 KTM 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 discs.
• 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 discs.
• Change the rear brake disc.

Checking the front brake fluid level

Warning

Danger of accidents An insufficient brake fluid level will cause the brake system to fail.

If the brake fluid level drops below the specified marking or the specified value, the brake system is leaking or the brake linings are worn down.

• Check the brake system and do not continue riding until the problem is eliminated. (Your authorized KTM workshop will be glad to help.)

Danger of accidents Old brake fluid reduces the braking effect.

• Make sure that brake fluid for the front and rear brake is changed in accordance with the service schedule. (Your authorized KTM workshop will be glad to help.)

• Move the brake reservoir mounted on the handlebar to a horizontal position.
• Check the brake fluid level in brake fluid reservoir 1.

If the brake fluid level has dropped below MIN marking A:

• Add front brake fluid.

Adding front brake fluid

Warning

Danger of accidents An insufficient brake fluid level will cause the brake system to fail.

If the brake fluid level drops below the specified marking or the specified value, the brake system is leaking or the brake linings are worn down.

• Check the brake system and do not continue riding until the problem is eliminated. (Your authorized KTM workshop will be glad to help.)

Skin irritation Brake fluid causes skin irritation.

• Keep brake fluid out of the reach of children.
• Wear suitable protective clothing and safety glasses.
• Do not allow brake fluid to come into contact with the skin, the eyes or clothing.
• Consult a doctor immediately if brake fluid has been swallowed.
• Rinse the affected area with plenty of water in the event of contact with the skin.
• Rinse eyes thoroughly with water immediately and consult a doctor if brake fluid comes into contact with the eyes.
• If brake fluid spills on to your clothing, change the clothing.

Danger of accidents Old brake fluid reduces the braking effect.

• Make sure that brake fluid for the front and rear brake is changed in accordance with the service schedule. (Your authorized KTM workshop will be glad to help.)

Note

Environmental hazard Hazardous substances cause environmental damage.

• Dispose of oils, grease, filters, fuel, cleaning agents, brake fluid, etc., correctly and in compliance with the applicable regulations.

Info

Never use DOT 5 brake fluid. It is silicone-based and purple in color. Oil seals and brake lines are not designed for DOT 5 brake fluid.

Avoid contact between brake fluid and painted parts. Brake fluid attacks paint.

Only use clean brake fluid from a sealed container.

Preparatory work

• Check the front brake linings.

Main work

Move the brake reservoir mounted on the handlebar to a horizontal position.

• Remove screws 1.
• Take off cover 2 with membrane 3.
• Add brake fluid up to MAX marking A.

Brake fluid DOT 4 / DOT 5.1

• Position cover 2 with membrane 3.
• Mount and tighten screws 1.

Info

Clean up overflowed or spilled brake fluid immediately with water.

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