| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 154 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 42 |
| Horn not working |1.7.3a| | 38 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 38 |
| Registration plate issues | 34 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 29 |
| Drive chain excessively loose |6.2.1d| | 28 |
| Front Brake excessively binding (1.2.1 (f)) | 19 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 17 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 16 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 15 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 14 |
| Rear Brake excessively binding (1.2.1 (f)) | 14 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 13 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 11 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 10 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 9 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 8 |
| Offside Headlamp aim beam image kick up to the offside |1.6| | 8 |
| Headlamp aim beam image kick up to the offside |1.6| | 7 |
| Offside Front Footrest insecure |6.2.1a| | 7 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 7 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 6 |
| Nearside Front Brake disc|s| cracked |3.2.A1g| | 6 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 6 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 6 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 6 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 5 |
| Horn not working |7.7 |a| |ii|| | 5 |
| Offside Front Direction indicator not working |1.5.1c| | 5 |
| Rear reflector on motorcycle missing |1.4.1| | 5 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 5 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 5 |
| Throttle operating incorrectly |6.2.1f| | 5 |
| Rear position lamp insecure |1.1.1c| | 5 |
| Drive chain worn to excess |6.2.1e| | 5 |
| Stop lamp remains on when the brakes are released | 5 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 5 |
| Rear Brake excessively binding |1.2.1 |f|| | 4 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 4 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 4 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 4 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 4 |
| Front Brake excessively binding |1.2.1 |f|| | 4 |
| Horn not working (7.7 (a) (ii)) | 4 |
| Rear Position lamp not working (4.2.1 (a)) | 4 |
| Horn not working (7.7 (a)) | 4 |
| Nearside Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 3 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Front Horn not working |1.7.3a| | 3 |
| Nearside Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 3 |
| Riders seat insecure |6.2.1a| | 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 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Rear Brake pedal attachment screws loose |3.1.2b| | 3 |
| Rear Brake disc|s| cracked |3.2.A1g| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Front Plate brake test indicates a binding brake |3.3.B1a| | 3 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 3 |
| Rear Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 3 |
| Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 3 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 3 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Nearside Front Brake disc fractured (1.1.14 (a) (ii)) | 3 |