| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 62 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 52 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 47 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 38 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 30 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 30 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 28 |
| Registration plate issues | 27 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 26 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 20 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 20 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 18 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 18 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 16 |
| Front suspension has inadequate damping effect. |2.3.6c| | 14 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 13 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 11 |
| Steering headbearing has excessive free play |2.2.2| | 10 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 9 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 9 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 8 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 8 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 8 |
| 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| | 6 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 6 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 6 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 6 |
| Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Front Steering headbearing has excessive free play |2.2.2| | 5 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 5 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Throttle operating incorrectly |6.2.1f| | 5 |
| Exhaust excessively deteriorated |7.1.1a| | 4 |
| Rear reflector on motorcycle missing |1.4.1| | 4 |
| Direction indicators not working |1.5.1c| | 4 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 4 |
| Horn not working |1.7.3a| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| 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| | 3 |
| Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Rear Rear wheel bearings are excessively rough |2.4.A.2c| | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Headlamp switch faulty |1.2.4| | 3 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 3 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 3 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 3 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Floor brake test Neither brake control achieves an efficiency of 25% |3.3.C1b| | 2 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 2 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Front Throttle operating incorrectly |6.2.1f| | 2 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 2 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 2 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Nearside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Rear Brake hose leaking fluid |3.2.B4| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Horn is not continous or uniform |1.7.3c| | 2 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 2 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Rear Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 2 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 2 |
| Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Rear Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 2 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Rear Position lamp not working |4.2.1 |a|| | 2 |
| Front Brake disc contaminated (1.1.14 (b)) | 2 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Front Brake fluid reservoir fluid not visible (1.1.10 (d) (iii)) | 2 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 2 |