| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 60 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 51 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 39 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 37 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 35 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 30 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 29 |
| Rear reflector on motorcycle missing |1.4.1| | 28 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 25 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 21 |
| Steering headbearing has excessive free play |2.2.2| | 21 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 20 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 19 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 19 |
| Front wheel bearings are excessively rough |2.3.5b| | 19 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 18 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 17 |
| Registration plate issues | 17 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 16 |
| Headlamp insecure |1.2.3b| | 15 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 12 |
| Nearside Front Direction indicator not working |1.5.1c| | 11 |
| Front wheel bearings have excessive free play |2.3.5b| | 11 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 10 |
| Offside Front Direction indicator not working |1.5.1c| | 10 |
| Horn not working |1.7.3a| | 10 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 9 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 9 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 8 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 8 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 8 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 8 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Headlamp aim not tested |1.6| | 7 |
| Rear Brake lever insecure |3.1.2a| | 7 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 7 |
| Offside Steering lock stop ineffective |2.1.3| | 6 |
| 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 |
| Rear reflector on motorcycle obscured |1.4.1| | 6 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 6 |
| Front Steering headbearing has excessive free play |2.2.2| | 6 |
| Offside Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Brake lever has inadequate reserve travel |3.1.3b| | 6 |
| Offside Front Direction indicators not working |1.5.1c| | 5 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 5 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 5 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 5 |
| Headlamp aim beam image kick up to the offside |1.6| | 5 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 5 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 5 |
| Rear Brake lever has insufficient reserve travel (1.1.2 (a)) | 5 |
| Riders seat insecure |6.2.1a| | 4 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 4 |
| Nearside Front Direction indicator insecure |1.5.3b| | 4 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 4 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 4 |
| Direction indicators not working |1.5.1c| | 4 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 4 |
| Front Headlamp insecure |1.2.3b| | 4 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Offside Rear Direction indicator not working |1.5.1c| | 3 |
| Nearside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Exhaust excessively deteriorated |7.1.1a| | 3 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Rear Rear reflector on motorcycle obscured |1.4.1| | 3 |
| Offside Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Front position lamp insecure |1.1.1c| | 3 |
| Offside Front Direction indicator insecure |1.5.3b| | 3 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 3 |
| Front Direction indicator insecure |1.5.3b| | 3 |
| Headlamp switch insecure |1.2.4| | 3 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 3 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Indicator switch defective |1.5.4| | 3 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 3 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 3 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 3 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Offside Steering lock stop missing |2.1.3| | 3 |
| An item not tested |Manual| | 3 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Nearside Front Direction indicators not working |1.5.1c| | 3 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Fuel system component leaking |7.2.1a| | 3 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 3 |
| Front suspension assembly component excessively bent |2.3.1| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Fairing insecure and likely to impede the steering |2.1.2e| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Front Lower Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 2 |
| Front Brake disc|s| cracked |3.2.A1g| | 2 |
| Headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Rear Brake lever mounting insecure |3.1.2a| | 2 |
| Rear Rear wheel rotation likely to be impeded |6.2.1b| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Rear Direction indicators not working |1.5.1c| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Nearside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Offside Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 2 |
| Centre Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 2 |
| Front Front position lamp insecure |1.1.1c| | 2 |
| Headlamp switch faulty |1.2.4| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Rear position lamp insecure |1.1.1c| | 2 |
| Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Front Brake hose fouling |3.2.B3b| | 2 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Rear Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Nearside Rear Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Front Brake excessively binding |1.2.1 |f|| | 2 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 2 |