| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 15 |
| Registration plate issues | 13 |
| Steering headbearing has excessive free play |2.2.2| | 7 |
| Horn not working |1.7.3a| | 6 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 6 |
| Drive chain excessively loose |6.2.1d| | 6 |
| Rear reflector on motorcycle missing |1.4.1| | 4 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| 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 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Fuel cap does not fasten securely by a positive means |7.2.2b| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 2 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front wheel spindle loose |2.3.5a| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Rear Exhaust excessively deteriorated |7.1.1a| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Motorcycle structure excessively distorted |6.1.1a| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Offside Inner Exhaust excessively deteriorated |7.1.1a| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Rear Wheel more than one fixing missing |5.2.1 |a| |ii|| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Floor brake test Neither brake control achieves an efficiency of 25% |3.3.C1b| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Front Wheel spindle loose (5.2.1 (c) (i)) | 1 |
| Nearside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Front Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride Drive chain link wrong way round |6.2.1h| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Nearside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Front Handlebar handgrip missing |2.1.1c| | 1 |
| Horn sound not in accordance with requirements not loud enough |7.7 |c|| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front wheel spindle loose |2.3.3a| | 1 |
| Offside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Steering lock stop ineffective |2.1.3| | 1 |
| Rear Brake pedal mounting insecure |3.1.2a| | 1 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Front Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear position lamp missing |1.1.1a| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Offside Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Offside Rear Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Direction indicator insecure |1.5.3b| | 1 |
| Front Brake component is excessively corroded |3.1.5| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Nearside Rear Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Offside Rear Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Front Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Rear Rear position lamp insecure |1.1.1c| | 1 |
| Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Handlebar mounting clamp bolt missing |2.1.1a| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Nearside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Fuel cap ineffective |6.1.3 |b| |i|| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Rear Rear position lamp incorrect colour |1.1.2b| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Fuel pipe leaking |7.2.1a| | 1 |
| Nearside Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Nearside Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Front Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 1 |
| Front Brake has no recorded effort at a wheel (1.2.1 (a) (ii)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Nearside Front Footrest insecure (6.2.12 (a)) | 1 |
| Rear Brake lever has restricted free movement pedal fouling exhaust (1.1.15 (e)) | 1 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |