Derbi GP1 50 cc Workshop Manual page 83

3. Check:
- Spokes.
Warps/damage => Replace.
4. Measure:
- Distortion of the front wheel
Above that specified => Replace.
Distortion limits for the front wheel:
Radial (a):
0,5 mm
Lateral (b):
0,8 mm
5. Check:
- Front wheel bearings.
Bearings allow play in the wheel hub or the wheel does not
turn freely => Replace.
- Retaining rings.
Damage/wear => Replace.
6. Inspect:
- Spacer.
With scratches/worn => Replace the spacer and the
retaining ring.
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