| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 35 |
| Registration plate issues | 20 |
| Rear reflector on motorcycle missing |1.4.1| | 17 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 7 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 5 |
| Rear reflector missing (4.8.2 (a) (ii)) | 5 |
| Rear Wheel spoke cracked. |4.2.1b| | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| 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| | 3 |
| Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Registration plate lamp issues | 3 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Horn not working |1.7.3a| | 2 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 2 |
| Drive chain excessively loose |6.2.1d| | 2 |
| Direction indicator missing |1.5.1a| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear Brake excessively binding (1.2.1 (f)) | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Motorcycle structure joining/attachment plate or fastening insecure rear fender |6.1.1 |b| |i|| | 1 |
| 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 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Stop lamp does not illuminate immediately a brake applies front switch |1.3.1a| | 1 |
| Rear Brake hose leaking fluid |3.2.B4| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Rear Brake disc|s| excessively pitted |3.2.A1l| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Brake hose fouling |3.2.B3b| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Wheel spoke excessively loose rear wheel has 4 broken spokes |4.2.1b| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Nearside Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Motorcycle structure adversely modified |6.1.1b| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Wheel spoke cracked. |4.2.1b| | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Front Horn not working (7.7 (a) (ii)) | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Horn not working (1.7.3a) | 1 |
| Centre Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Stop lamp does not illuminate immediately a brake applies foot switch (1.3.1a) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Central Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Centre Front Horn not working |1.7.3a| | 1 |
| 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 |
| Nearside Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 1 |
| Offside Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 1 |
| Front Brake caliper leaking and braking performance affected banjo bolt washers leaking (1.1.16 (b) (ii)) | 1 |
| Front Brake cylinder leaking and braking performance affected brake cylinder leaking (1.1.16 (b) (ii)) | 1 |
| Front Brake fluid significantly below minimum mark (1.1.10 (d) (ii)) | 1 |
| Rear Direction indicator obviously incorrectly positioned number plate covering half of indicators (4.4.3 (a)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Front Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Brake lever pivot excessively worn (1.1.1 (b)) | 1 |
| Central Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Nearside Exhaust silencer insecure (8.1.1 (b) (i)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling (2.5.1) | 1 |
| Rear Brake disc fractured (1.1.14 (a) (ii)) | 1 |