KTM 790 DUKE 2021, Owner'S Manual

Page: 73 / 139

BRAKE SYSTEM 14
71
The ABS warning lamp may also light up if the rotating speeds of
the front and rear wheels differ greatly under extreme riding con-
ditions, 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.
14.2 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.)
100135-10
–
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 con-
tact surface
1
of the brake linings.
Brake discs - wear limit
front 4.5 mm (0.177 in)
rear 4.5 mm (0.177 in)
» 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 deforma-
tion:
–
Change the front brake discs.
–
Change the rear brake disc.
14.3 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.)
Warning
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.)