KTM 125 SX 2010 Owner's Manual page 781

– Measure the outside diameter of the inner-tube, rotate the inner-
tube 180° and measure again. Repeat these measurements on
several places of the inner-tube.
The maximum diameter is: 48.005mm
The minimum diameter is: 47.950mm
– Clock gauge for measuring the straightness of the inner-tube.
– Measure the straightness of the inner-tube.
NOTE:
– Place the V-blocks as far as possible at the sides of the running
surface of the innertube according to the picture
– Place the gauge clock in the middle of the inner-tube.
– Rotate the inner-tube 360°.
The maximum travel is: 0.06mm
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