Checking The Brake Discs; Checking The Spoke Tension - KTM 2011 690 SMC EU Repair Manual

12 WHEELS
12.3

Checking the brake discs

Warning
Danger of accidents Reduced braking efficiency due to worn brake disc(s).
–
Change the worn brake disc(s) without delay.
12.4

Checking the spoke tension

Warning
Danger of accidents Instable handling due to incorrect spoke tension.
–
Ensure that the spoke tension is correct.
Info
A loose spoke causes wheel imbalance and rapidly leads to more loose spokes.
If the spokes are too tight, they can break due to local overload.
Check the spoke tension regularly, especially on a new motorcycle.
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 5 years.
» If a tire is more than 5 years old:
–
Change the tires.
–
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
the brake disc.
Brake discs - wear limit
Front
100135-10
Rear
» 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.
–
Briefly strike each spoke with a screwdriver blade.
Info
The frequency of the tone is a function of the spoke length and spoke diam-
eter.
If you hear different tone frequencies from individual spokes of the same
length and thickness, this is an indication of different spoke tensions.
You should hear a high note.
400694-01
» If the spoke tensions differ:
–
Correct the spoke tension.
.
A
4.0 mm (0.157 in)
4.5 mm (0.177 in)
69
of
1