| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 68 |
| Rear reflector on motorcycle missing |1.4.1| | 52 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 38 |
| Registration plate issues | 32 |
| Horn not working |1.7.3a| | 19 |
| Drive chain excessively loose |6.2.1d| | 18 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 18 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 15 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 14 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 12 |
| Rear reflector missing (4.8.2 (a) (ii)) | 11 |
| Stop lamp remains on when the brake is released |1.3.1e| | 10 |
| Front wheel bearings have excessive free play |2.3.5b| | 9 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 8 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 8 |
| Registration plate lamp issues | 8 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 6 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 6 |
| Headlamp aim beam image kick up to the offside |1.6| | 6 |
| Horn control defective |1.7.2a| | 5 |
| Throttle operating incorrectly |6.2.1f| | 5 |
| Rear Position lamp not working (4.2.1 (a)) | 5 |
| Drive chain worn to excess |6.2.1e| | 5 |
| Nearside Rear Direction indicator not working |1.5.1c| | 5 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Horn not working (7.7 (a)) | 4 |
| Front wheel bearings are excessively rough |2.3.5b| | 4 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 4 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 4 |
| Stop lamp remains on when the brakes are released | 4 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 4 |
| Rear reflector missing |4.8.2 |a| |ii|| | 4 |
| Rear position lamp insecure |1.1.1c| | 3 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Offside Rear Direction indicators not working |1.5.1c| | 3 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 3 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 3 |
| Horn sound not in accordance with requirements (7.7 (c)) | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Rear Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Rear Position lamp adversely affected by the operation of another lamp (4.2.3 (b)) | 2 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Central Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Nearside Steering lock stop maladjusted |2.1.3| | 2 |
| Offside Steering lock stop maladjusted |2.1.3| | 2 |
| Rear suspension component cracked |2.4.A.1a| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Central Front Horn not working (7.7 (a)) | 2 |
| Central Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Nearside Handlebar fouling on the fuel tank or bodywork on full lock |2.1.4 |b|| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Horn control not functioning. |1.7.2b| | 2 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Stop lamp does not illuminate immediately a brake applies Front lever |1.3.1a| | 2 |