KTM 390 DUKE 2021 Owner's Manual page 143

–
Check the front and rear brake disc thickness at multiple
points for the dimension
Info
Wear will reduce the thickness of the brake disc at con-
tact surface
Brake discs - wear limit
front
400480-10
rear
» 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 deforma-
tion:
–
Change the front brake disc.
–
Change the rear brake disc.
BRAKE SYSTEM 13
A
.
1
of the brake linings.
4.5 mm (0.177 in)
3.6 mm (0.142 in)
141