Preliminary inspection - brake discs
1. Measure brake disc thickness for excessive wear. Minimum acceptable thickness is stamped on side of disc.
2. If warped, replace disc. Maximum allowable lateral runout of a spring washer mounted brake disc is 0.3 mm (0.012 in.).
3. If scored, replace disc.
Preliminary inspection - wheel/tire
1. Block motorcycle underneath frame so front wheel is raised off the ground.
2. Inspect tire for wear and wear pattern. Replace tire as necessary.
3. Inspect air valve. Replace as necessary.
4. Inspect wheel bearing end play and service bearings if necessary. If end play is 0.051 mm (0.002 in.) or more, replace the wheel bearings. See 2.24 Sealed wheel bearings.
Figure 2-64. Front wheel components: 1. Disc wheel; 2. Bolt (5 per brake disc); 3. Spring washer (5 per brake disc); 4. Bearing (2); 5. Brake disc (2); 6. Plug; 7. Balance weight; 8. Air valve cap; 9. Sleeve