| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 65 |
| Registration plate lamp issues | 50 |
| Horn not working |1.7.3a| | 24 |
| Rear reflector on motorcycle missing |1.4.1| | 21 |
| Rear reflector missing (4.8.2 (a) (ii)) | 20 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 20 |
| Drive chain excessively loose |6.2.1d| | 20 |
| Registration plate issues | 17 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 16 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 11 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 11 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Front Brake excessively binding (1.2.1 (f)) | 9 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 9 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 8 |
| Horn not working (7.7 (a)) | 8 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 7 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 6 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 6 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 6 |
| Drive chain worn to excess |6.2.1e| | 6 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 6 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Horn not working (7.7 (a) (ii)) | 5 |
| Horn not working |7.7 |a| |ii|| | 5 |
| Stop lamp remains on when the brakes are released | 5 |
| Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Rear Brake excessively binding (1.2.1 (f)) | 5 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Throttle operating incorrectly |6.2.1f| | 5 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 5 |
| Drive chain excessively tight |6.2.1d| | 5 |
| Handlebar deformed |2.1.1b| | 5 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 5 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 4 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 4 |
| Headlamp insecure |1.2.3b| | 4 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 4 |
| Headlamp aim not tested |1.6| | 4 |
| 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)) | 4 |
| 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 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 3 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 3 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Front Position lamp not working (4.2.1 (a)) | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 2 |
| Front Handlebar deformed |2.1.1b| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort (3.3.A1d) | 2 |
| Rear Upper Shock absorber has an excessively worn bush |5.3.2 |c|| | 2 |
| Nearside Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Front Brake disc contaminated (1.1.14 (b)) | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Upper Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Rear Wheel spindle locking device missing (5.2.1 (d)) | 2 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 2 |
| Front Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 2 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Horn control not functioning. |1.7.2b| | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Fuel cap ineffective (6.1.3 (b) (i)) | 2 |
| Headlamp aim not tested (4.1.2 (b)) | 2 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Headlamp insecure (4.1.1 (c)) | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Rear Brake disc fractured (1.1.14 (a) (ii)) | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |