Warning! Before starting work, ensure the motorcycle is stabilised and adequately supported. This will help prevent it from falling and causing injury to the operator or damage to the motorcycle.
Wear
1. Replace any brake disc if worn beyond the service limit or exceeds the disc run-out limit.
| Front Disc Thickness | |
| Standard | 5.0 mm |
| Service limit | 4.0 mm |
| Disc Run-out | |
| Standard | 0.1 mm |
| Service limit | 0.3 mm |
1. Measure disc run out using an accurate dial gauge mounted on a surface plate.
1. Disc; 2. Dial gauge
Removal
Warning! Do not renew front brake discs individually. Discs must always be renewed in pairs even if one of a pair is serviceable. A dangerous riding condition leading to loss of motorcycle control and an accident could result if this warning is ignored.
1. Remove the front wheel as described on page 16.6.
Warning! To avoid wheel damage, always support the wheel as instructed below. A dangerous riding condition leading to loss of motorcycle control and an accident could result if this warning is ignored.
2. Support the wheel on blocks as illustrated.
1. Wheel; 2. Support block
3. Remove and discard the disc securing bolts.
4. Detach the disc.
5. Repeat operations 2, 3 and 4 to remove the disc on the opposite side.
Installation
1. Locate the first disc on the correct side of the wheel (offset of disc outwards) as noted during removal.
2. Fit new disc bolts and tighten to 22 Nm.
3. Fit the remaining disc in the same way.
4. Refit the wheel as described on page 16.7.
5. Check the operation of the front brake. Rectify as necessary.
Warning! It is dangerous to operate the motorcycle with defective brakes and you must have your authorised Triumph Dealer take remedial action before you attempt to ride the motorcycle again. Failure to take remedial action may reduce braking efficiency leading to loss of motorcycle control and an accident.