| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 190 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 70 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 67 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 62 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 54 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 49 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 48 |
| Steering headbearing has excessive free play |2.2.2| | 44 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 42 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 34 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 32 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 32 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 29 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 28 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 27 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 24 |
| Registration plate issues | 24 |
| Horn not working |1.7.3a| | 23 |
| Riders seat insecure |6.2.1a| | 23 |
| Nearside Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 20 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 19 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 18 |
| Offside Rear Direction indicator not working |1.5.1c| | 18 |
| Offside Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 18 |
| Rear reflector on motorcycle missing |1.4.1| | 17 |
| Registration plate lamp issues | 16 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 14 |
| Indicator switch defective |1.5.4| | 14 |
| Exhaust excessively deteriorated |7.1.1a| | 14 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 14 |
| Nearside Rear Direction indicator not working |1.5.1c| | 14 |
| Throttle operating incorrectly |6.2.1f| | 13 |
| Headlamp switch faulty |1.2.4| | 13 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 13 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 13 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 13 |
| Nearside Rear Direction indicators not working |1.5.1c| | 12 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 12 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 11 |
| Offside Rear Direction indicators not working |1.5.1c| | 11 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 10 |
| Nearside Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 10 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 9 |
| Headlamp aim not tested |1.6| | 9 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 9 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 9 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 9 |
| Headlamp aim beam image kick up to the offside |1.6| | 8 |
| Front position lamp incorrect colour |1.1.2a| | 8 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 8 |
| Offside Rear Position lamp not working (4.2.1 (a)) | 8 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 8 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 8 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 8 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 7 |
| Front Steering headbearing has excessive free play |2.2.2| | 7 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 7 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 7 |
| Nearside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 7 |
| Offside Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Direction indicators not working |1.5.1c| | 6 |
| Rear Position lamp not working (4.2.1 (a)) | 6 |
| Fuel cap sealing washer missing |7.2.2c| | 6 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 6 |
| Front wheel bearings are excessively rough |2.3.5b| | 6 |
| Offside Front Direction indicator not working |1.5.1c| | 6 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 6 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Rear suspension component loose |2.4.A.1a| | 5 |
| Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 5 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Nearside Front Brake disc|s| has excessive run out |3.2.A1m| | 5 |
| Rear Direction indicators not working |1.5.1c| | 5 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 5 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 5 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 5 |
| Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 5 |
| 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| | 5 |
| Offside Rear suspension component cracked |2.4.A.1a| | 5 |
| Rear wheel insecure |4.2.3b| | 5 |
| Offside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 5 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 5 |
| Nearside Rear Position lamp not working (4.2.1 (a)) | 5 |
| Offside Front Brake disc|s| has excessive run out |3.2.A1m| | 4 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 4 |
| Nearside Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Rear Exhaust excessively deteriorated |7.1.1a| | 4 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Nearside Front Direction indicator not working |1.5.1c| | 4 |
| Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 4 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 4 |
| Offside Front Brake disc|s| excessively worn |3.2.A1l| | 4 |
| Nearside Direction indicators flashing more than 120 times per minute |1.5.1c| | 4 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |