KTM 690 Enduro R USA 2013 Owner's Manual page 129

13 WHEELS, TIRES
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.
–
Briefly strike each spoke with a screwdriver blade.
Info
The frequency of the tone is a function of the spoke length and spoke diameter.
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.
» If the spoke tensions differ:
400694-01
–
Correct the spoke tension. x
127