| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 69 |
| Registration plate issues | 40 |
| Rear reflector on motorcycle missing |1.4.1| | 26 |
| 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| | 10 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Rear reflector missing (4.8.2 (a) (ii)) | 5 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Stop lamp remains on when the brakes are released | 3 |
| Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Rear reflector missing |4.8.2 |a| |ii|| | 3 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Central Rear Upper Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Drive belt guard insecure |6.2.1c| | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Rear Brake component cracked and seriously reduced in strength |3.2.A1| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Fuel hose leaking Tank to throttle body. (6.1.3 (b) (i)) | 1 |
| Fuel hose leaking excessively or a risk of fire (6.1.3 (b) (ii)) | 1 |
| Front Brake hose leaking fluid |3.2.B4| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Stop lamp does not emit a steady light side light flickering led stop and tail sealed unit |1.3.1b| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition |8.1.1 |a|| | 1 |
| Central Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Front Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Registration plate lamp issues | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Horn not working |1.7.3a| | 1 |
| Stop lamp not working both controls (4.3.1 (a) (ii)) | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Nearside Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Central Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Offside Rear Direction indicator lens defective such that the emitted light is adversely affected (4.4.1 (b) (ii)) | 1 |
| Central Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Sidecar rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Nearside Rear Direction indicators not working Failed bulb |1.5.1c| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Brake indicates excessive fluctuation of brake effort Front disc showing full scale deflection. On brake rollers |1.2.1 |e|| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Nearside Front Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Nearside Front Brake excessively binding (1.2.1 (f)) | 1 |
| Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Nearside Rear Road wheel fixing loose (5.2.1 (a) (i)) | 1 |
| Front Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 1 |
| Front Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Rear 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 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 1 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |