| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 20 |
| Horn not working |1.7.3a| | 8 |
| Registration plate issues | 6 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Riders seat insecure |6.2.1a| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Fuel system component leaking |7.2.1a| | 3 |
| Rear Brake locking device missing |3.2.A1e| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Headlamp insecure |1.2.3b| | 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 Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Front Wheel spoke excessively loose |4.2.1b| | 2 |
| Brake hose excessively deteriorated | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| Rear Footrest missing |6.2.1a| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Nearside Rear Footrest insecure |6.2.1a| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Indicator switch defective |1.5.4| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Nearside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Front Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |
| Brake hose damaged | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Offside Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Rear Brake locking device missing Brake ankor bolt no locking device |3.2.A1e| | 1 |
| Front Brake hose excessively damaged |1.1.12 |b| |ii|| | 1 |
| Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 1 |
| Offside Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Front Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Rear Rear position lamp insecure |1.1.1c| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Fuel cap sealing washer missing |7.2.2c| | 1 |
| Nearside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Exhaust has part of the system missing |7.1.1a| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Rear Brake pedal insecure |3.1.2a| | 1 |
| Drive chain excessively loose |6.2.1d| | 1 |
| Rear position lamp does not face the rear |1.1.1d| | 1 |
| Centre Headlamp missing |1.2.3a| | 1 |
| Stop lamp missing |1.3.3a| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Front Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Brake pedal is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Front Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Brake rod insecure spit pin missing |1.1.15 |c|| | 1 |
| Front Brake clevis joint insecure locking nut missing |1.1.15 |c|| | 1 |
| Front Brake locking device insecure |3.2.A1e| | 1 |
| Nearside Headlamp switch insecure |1.2.4| | 1 |
| Brake lever attachment screws loose |3.1.2b| | 1 |
| Front Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Offside Rear Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Rear Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Headlamp missing low beam not working |1.2.3a| | 1 |
| Rear position lamp missing |1.1.1a| | 1 |
| Stop lamp missing front or rear not working |1.3.3a| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride drive sprocket |6.2.1h| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Front suspension assembly component loose |2.3.1| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Rear suspension bush has excessive free play swing arm |2.4.A2a|i|| | 1 |
| Fuel pipe leaking |7.2.1a| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Front Brake pipe union leaking fluid |3.2.B4| | 1 |
| Nearside Brake back plate|s| securing bolt|s| loose |3.2.A1j| | 1 |