| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 6 |
| Drive chain excessively loose |6.2.1d| | 5 |
| Headlamp aim out of alignment | 4 |
| Horn not working |1.7.3a| | 4 |
| Rear reflector on motorcycle obscured |1.4.1| | 4 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Registration plate issues | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 2 |
| Centre Lower Rear shock absorber insecurely mounted |2.4.A.3b| | 2 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 2 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Rear Brake caliper|s| insecure |3.2.A1j| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Brake fluid reservoir leaking hydraulic fluid level glass weeping fluid |3.2.B1e| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Drive chain excessively loose |6.2.1d| | 1 |
| Rear Brake disc|s| excessively pitted |3.2.A1l| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Centre Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Floor brake test indicates a severely grabbing brake |3.3.C2d| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Rear Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Nearside Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Centre Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Nearside Lower Motorcycle structure cracked |6.1.1a| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Centre Rear Drive chain excessively loose |6.2.1d| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front suspension fouling which affects the movement of the front suspension. |2.3.6a| | 1 |
| Front Brake lagging in operation (1.2.1 (d)) | 1 |
| Exhaust system insecure (6.1.2 (a)) | 1 |
| Exhaust silencer likely to become detached (8.1.1 (b) (ii)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |