| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 79 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 30 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 24 |
| Registration plate issues | 19 |
| Brake hose excessively deteriorated | 15 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 15 |
| Horn not working |1.7.3a| | 14 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 13 |
| Steering headbearing has excessive free play |2.2.2| | 13 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Throttle operating incorrectly |6.2.1f| | 11 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 11 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 10 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Headlamp aim beam image kick up to the offside |1.6| | 9 |
| Rear reflector on motorcycle missing |1.4.1| | 9 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 8 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Direction indicators not working |1.5.1c| | 7 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 7 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Front Steering headbearing has excessive free play |2.2.2| | 6 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 6 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 6 |
| Rear Brake locking device missing |3.2.A1e| | 6 |
| Rear suspension has corrosion which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 6 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 5 |
| Offside Front Direction indicator not working |1.5.1c| | 5 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 5 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 5 |
| Brake locking device missing |3.2.A1e| | 5 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Horn not working |7.7 |a| |ii|| | 4 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 4 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 4 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Rear brake binding | 4 |
| Front suspension has inadequate damping effect. |2.3.6c| | 4 |
| Nearside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 4 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Front Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 3 |
| Front Direction indicators not working |1.5.1c| | 3 |
| Rear Direction indicators not working |1.5.1c| | 3 |
| Offside Direction indicator not working |1.5.1c| | 3 |
| Rear Footrest missing |6.2.1a| | 3 |
| Offside Rear Direction indicator not working |1.5.1c| | 3 |
| Headlamp switch faulty |1.2.4| | 3 |
| Nearside Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 3 |
| Offside Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 3 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 3 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Nearside Steering lock stop ineffective |2.1.3| | 3 |
| Offside Steering lock stop ineffective |2.1.3| | 3 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Offside Rear Footrest missing |6.2.1a| | 3 |
| Offside Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 3 |
| Rear Motorcycle structure excessively corroded |6.1.1a| | 3 |
| Nearside Rear Footrest insecure |6.2.1a| | 3 |
| Offside Rear Footrest insecure |6.2.1a| | 3 |
| Offside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Nearside Front Direction indicators not working |1.5.1c| | 3 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 3 |
| Nearside Rear Footrest missing |6.2.1a| | 3 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 3 |
| Headlamp incorrect colour |1.2.1| | 2 |
| Offside Indicator switch defective |1.5.4| | 2 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Nearside Direction indicator not working |1.5.1c| | 2 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 2 |
| Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Rear brake application uneven | 2 |
| Nearside Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 2 |
| Rear suspension component excessively corroded. |2.4.A.1a| | 2 |
| Rear Brake locking device insecure |3.2.A1e| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Nearside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Fuel system component leaking |7.2.1a| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Nearside Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Nearside Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Nearside Front Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Offside Front Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Lower Steering headbearing has excessive free play |2.2.2| | 2 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 2 |
| Front wheel spindle securing nut locking device insecure |2.3.3a| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Rear Rear suspension has corrosion which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 2 |
| Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| 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| | 2 |
| Front Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 2 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Centre Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Nearside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Offside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |