| Most common failures | No# failures |
|---|
| Registration plate issues | 27 |
| Rear reflector missing (4.8.2 (a) (ii)) | 17 |
| Rear reflector on motorcycle missing |1.4.1| | 11 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 9 |
| Rear reflector missing |4.8.2 |a| |ii|| | 8 |
| Registration plate lamp issues | 8 |
| Horn not working |7.7 |a| |ii|| | 7 |
| Headlamp aim out of alignment | 7 |
| Horn not working (7.7 (a)) | 7 |
| Stop lamp remains on when the brakes are released | 6 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 5 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 5 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 5 |
| Horn not working (7.7 (a) (ii)) | 4 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Horn not working |1.7.3a| | 3 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Horn missing |1.7.1| | 2 |
| Front Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 2 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| Front Brake caliper insecure |1.1.16 |c| |i|| | 2 |
| Front Wheel excessively distorted (5.2.2 (c) (i)) | 2 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Central Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Exhaust has part of the system missing |7.1.1a| | 1 |
| Wheel excessively distorted |5.2.2 |c| |i|| | 1 |
| Wheel spoke excessively loose |5.2.2 |d|| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Horn missing |1.7.1| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Central Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Central Front Wheel bearing play so excessive that directional control is impaired (5.1.3 (a) (ii)) | 1 |
| Exhaust noise is clearly in excess of that emitted by a similar motor bicycle fitted with a standard silencer in average condition |7.1.2| | 1 |
| Rear Wheel spoke excessively loose |5.2.2 |d|| | 1 |
| Rear Stop lamp lens defective such that the emitted light is adversely affected |4.3.1 |b| |ii|| | 1 |
| Drive chain horseshoe locking device likely to become detached (6.1.7 (j) (ii)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Front Shock absorber has a serious fluid leak Both fork oil seals leaking |5.3.2 |b|| | 1 |
| Nearside Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Front Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Rear Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Suspension component pin or bush excessively worn swing arm pivot (5.3.4 (a) (i)) | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Nearside Front Shock absorber has a serious fluid leak forkseal |5.3.2 |b|| | 1 |
| Rear Wheel spoke excessively loose (5.2.2 (d)) | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Nearside Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Nearside Front Direction indicator missing (4.4.1 (a) (ii)) | 1 |
| Offside Front Direction indicator missing (4.4.1 (a) (ii)) | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Wheel spoke excessively loose Multiple spokes (5.2.2 (d)) | 1 |
| Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 1 |
| Dipswitch does not operate immediately when selected on main beam (4.1.3 (b)) | 1 |
| Front Brake lever has insufficient reserve travel |1.1.2 |a|| | 1 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Drive chain horseshoe locking device likely to become detached |6.1.7 |j| |ii|| | 1 |
| Exhaust system insecure bolt missing (6.1.2 (a)) | 1 |
| Central Motorcycle structure joining/attachment plate or fastening insecure frame bolt missing (6.1.1 (b) (i)) | 1 |
| Nearside Front Suspension arm ball joint dust cover missing bolt missing (5.3.4 (b) (ii)) | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Steering headbearing in such a condition that steering control is adversely affected |2.2.2 |f| |ii|| | 1 |
| Rear Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Rear Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 1 |
| Rear Wheel fixing loose (multiple fixings) (5.2.1 (a) (i)) | 1 |
| Front Horn not working (7.7 (a)) | 1 |
| Front Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Rear Drive chain sprocket excessively loose (6.1.7 (c) (i)) | 1 |
| Rear Brake caliper insecure (1.1.16 (c) (i)) | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Front Wheel spindle loose (5.2.1 (c) (i)) | 1 |
| Position lamp not working (4.2.1 (a)) | 1 |
| Nearside Front Lower Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Offside Front Lower Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Central Front Upper Horn not working (7.7 (a)) | 1 |
| Offside Front Lower Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Nearside Rear Lower Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Central Rear Lower Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Headlamp aim unable to be tested (4.1.2 (b)) | 1 |
| Brake caliper inadequately mounted (1.1.16 (c) (i)) | 1 |
| Front Brake fluid contaminated |1.8 |a|| | 1 |
| Rear Brake fluid contaminated |1.8 |a|| | 1 |
| Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 1 |
| Headlamp aim not tested |4.1.2 |b|| | 1 |
| Brake disc significantly and obviously worn |1.1.14 |a| |i|| | 1 |
| Offside Front Shock absorber insecurely attached (5.3.2 (a) (i)) | 1 |
| Front Wheel spoke missing (5.2.2 (d)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Rear Wheel spoke missing (5.2.2 (d)) | 1 |
| Front Wheel spoke excessively loose (5.2.2 (d)) | 1 |
| Rear Wheel fractured (5.2.2 (a)) | 1 |
| Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |