Honda SH125 Manual page 263

FRONT WHEEL/SUSPENSION/STEERlNG
Check the fork tube, slider and fork piston for score
marks, and excessive or abnormal wear.
Check the fork piston ring for wear or damage.
Check the rebound spring for fatigue or damage.
Replace any damaged component if necessary.
Visually inspect the guide bushing in the fork slider.
If it is excessive scoring
or
scratching, or if the teflon
is worn so the copper surface appears on more than
3/4 of the entire surface, replace the fork slider.
Set the fork tube in V-blocks and measure the fork
tube runout with a dial indicator.
Actual runout is 1/2 the total indicator reading.
SERVICE LIMIT: 0.2 mm (0.Olin)