KTM 2008 690 SMC EU - Checking the Brake Discs

09/FRONT WHEEL 61
Warning
Danger of accidents Reduced road grip with new tires.
– New tires have a smooth rolling surface and therefore cannot provide full road grip. The entire rolling surface must be
roughened in the first 200 kilometers (124.3 miles) by moderate riding at alternating angles. The full grip levels are not
achieved until the tires have been run in.
Info
The type, condition and air pressure of the tires all have a major impact on the handling of the motorcycle.
Worn tires have a negative effect on riding behavior, especially on wet surfaces.
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– Check the front and rear tires for cuts, run-in objects and other damage.
» If the tires exhibit cuts, run-in objects or other damage:
– Change the tires.
– Check the depth of the tread.
Info
Note local national regulations concerning the minimum tread depth.
Minimum tread depth ≥ 2 mm (≥ 0.08 in)
» If the tread depth is less than the minimum permissible depth:
– Change the tires.
– Check the age of the tires.
Info
The tire's date of manufacture is usually part of the tire markings and is
indicated by the last four digits of the DOT marking. The first two digits refer
to the week of manufacture and last two digits refer to the year of manufac-
ture.
KTM recommends that the tires are changed regardless of the actual wear,
at the latest after five years.
» If a tire is more than five years old:
– Change the tires.
11.5Checking the brake discs
Warning
Danger of accidents Reduced braking efficiency due to worn brake disc(s).
– Change the worn brake disc(s) without delay.
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– Check the thickness of the front and rear brake discs in several places to ensure
that it conforms to measurement .
Info
Wear reduces the thickness of the brake disc at the contact surface  of
the brake disc.
Brake discs - wear limit
Front 4.0 mm (0.157 in)
Rear 4.5 mm (0.177 in)
» If the brake disc thickness is less than the specified value:
– Replace the brake disc.
– Check the front and rear brake discs for damage, cracks, and deformation.
» If damage, cracks, or deformation are visible on the brake disc:
– Replace the brake disc.