| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 22 |
| Drive chain worn to excess |6.2.1e| | 12 |
| Rear reflector on motorcycle missing |1.4.1| | 9 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 9 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Drive chain excessively loose |6.2.1d| | 5 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Registration plate issues | 4 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Offside Rear Direction indicator not working |1.5.1c| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 3 |
| Exhaust excessively deteriorated |7.1.1a| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Front Direction indicator not working |1.5.1c| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Rear Brake disc|s| excessively pitted |3.2.A1l| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Offside Front Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| 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| | 1 |
| Direction indicator missing |1.5.1a| | 1 |
| Footrest missing |6.2.1a| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen bulb incorrectly fitted |1.6.B.1| | 1 |
| Fuel pipe leaking |7.2.1a| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Rear Position lamp switch does not operate the front and rear position lamps |1.1.4c| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Rear suspension component excessively corroded. |2.4.A.1a| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Rear Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Nearside Front Direction indicators affected by the operation of another lamp dull |1.5.1c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front position lamp damaged and function impaired |1.1.1b| | 1 |
| Front Brake caliper|s| insecure |3.2.A1j| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Rear Brake pedal is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Offside Handlebar restricted in free movement from lock to lock (2.1.4 (c)) | 1 |
| Front Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 1 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Brake pedal insecure |3.1.2a| | 1 |
| Front Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Rear brake disc in such a condition that it is seriously weakened | 1 |
| Front Wheel bearing so rough it is likely to overheat or break up |5.1.3 |b| |ii|| | 1 |
| Front Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Centre Front Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Centre Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Suspension component pin or bush excessively worn front lower shock bearing excess travel (5.3.4 (a) (i)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Stop lamp not working doesnt work front or rear switch |4.3.1 |a| |ii|| | 1 |
| Nearside Rear Direction indicator likely to become detached |4.4.1 |c| |ii|| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Steering operation restricted in free movement from lock to lock |2.1.4 |c|| | 1 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Offside Front Handlebar excessively deformed (2.2.1 (c) (i)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Lower Suspension component pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Front Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Registration plate lamp issues | 1 |
| Brake component inadequately mounted split pin missing |1.1.21 |c|| | 1 |
| Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Front Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Offside Handlebar deformed |2.1.1b| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Front Front position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Rear Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front suspension assembly component loose |2.3.1| | 1 |
| Rear Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Offside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Vehicle identification number not displayed |0.2 |a|| | 1 |
| Front Brake lever has insufficient reserve travel |1.1.2 |a|| | 1 |