| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 144 |
| Rear reflector on motorcycle missing |1.4.1| | 143 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 48 |
| Registration plate issues | 44 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 35 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 34 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 33 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 31 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 31 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 30 |
| Steering headbearing has excessive free play |2.2.2| | 28 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 22 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 19 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 14 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 14 |
| Horn not working |1.7.3a| | 14 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 14 |
| Riders seat insecure |6.2.1a| | 13 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 13 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 13 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 13 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 12 |
| Throttle operating incorrectly |6.2.1f| | 10 |
| Rear reflector missing (4.8.2 (a) (ii)) | 10 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 10 |
| Registration plate lamp issues | 9 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 9 |
| Stop lamp remains on when the brake is released |1.3.1e| | 8 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 8 |
| Front Steering headbearing has excessive free play |2.2.2| | 8 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 7 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 7 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 7 |
| Offside Rear Direction indicator not working |1.5.1c| | 7 |
| Nearside Lower Rear suspension bearing has excessive free play |2.4.A2a|i|| | 7 |
| Offside Lower Rear suspension bearing has excessive free play |2.4.A2a|i|| | 7 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 6 |
| Front position lamp incorrect colour |1.1.2a| | 6 |
| Rear reflector missing |4.8.2 |a| |ii|| | 6 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 6 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 6 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 6 |
| Direction indicators not working |1.5.1c| | 5 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 5 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 5 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 5 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 5 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 5 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 5 |
| Offside Front Direction indicator not working |1.5.1c| | 5 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| Nearside Front Direction indicator not working |1.5.1c| | 4 |
| Headlamp switch faulty |1.2.4| | 4 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 4 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 4 |
| Front suspension has inadequate damping effect. |2.3.6c| | 4 |
| Horn is not a constant note |1.7.3c| | 4 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 4 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 4 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 4 |
| Headlamp aim not tested |1.6| | 4 |
| Brake hose damaged | 4 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 4 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 4 |
| Nearside Rear Direction indicator not working |1.5.1c| | 4 |
| Stop lamp remains on when the brakes are released | 4 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 4 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Rear wheel insecure |4.2.3b| | 3 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Rear Brake lever cannot be applied smoothly |3.1.3d| | 3 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 3 |
| Fuel pipe leaking |7.2.1a| | 3 |
| Exhaust excessively deteriorated |7.1.1a| | 3 |
| Fuel cap missing |7.2.2a| | 3 |
| Offside Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 3 |
| Headlamp incorrect colour |1.2.1| | 3 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Nearside Direction indicator not working |1.5.1c| | 3 |
| Offside Direction indicator not working |1.5.1c| | 3 |
| Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Exhaust has part of the system missing |7.1.1a| | 3 |
| Horn control not functioning. |1.7.2b| | 3 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 3 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 3 |
| Fuel hose leaking |7.2.1a| | 3 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Rear suspension bearing excessively deteriorated |2.4A.2a|i|| | 3 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Rear suspension component loose |2.4.A.1a| | 3 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 3 |
| Rear Roller brake test indicates a severely juddering brake |3.3.A1b| | 3 |