| Most common failures | No# failures |
|---|
| Registration plate issues | 81 |
| Rear reflector on motorcycle missing |1.4.1| | 52 |
| Horn not working |1.7.3a| | 18 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 18 |
| Headlamp aim out of alignment | 17 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 17 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 15 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 15 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 15 |
| Front wheel bearings have excessive free play |2.3.5b| | 11 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 9 |
| Horn missing |1.7.1| | 9 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 7 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Front wheel bearings are excessively rough |2.3.5b| | 7 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Drive chain excessively loose |6.2.1d| | 6 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Rear Wheel spoke excessively loose |4.2.1b| | 5 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 5 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 4 |
| Horn not working (7.7 (a)) | 4 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| 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 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Front Horn not working |1.7.3a| | 3 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 3 |
| Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Front Stop lamp missing |1.3.3a| | 3 |
| Registration plate lamp issues | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Front Wheel spoke excessively loose |4.2.1b| | 2 |
| Rear Exhaust markings indicating not for road use or similar wording |7.1.4| | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Rear position lamp incorrect colour |1.1.2b| | 2 |
| Fuel system component leaking |7.2.1a| | 2 |
| Stop lamp missing |1.3.3a| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Fuel pipe leaking |7.2.1a| | 2 |
| Front Brake disc|s| insecure |3.2.A1g| | 2 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Rear Brake pedal attachment screws loose |3.1.2b| | 1 |
| Central Front Wheel bearing has excessive play Front Wheel Bearings Have Excessive (5.1.3 (a) (i)) | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Centre Rear Lower Wheel spoke excessively loose |4.2.1b| | 1 |
| Centre Front Lower Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Centre Rear Upper Front mudguard insecure |2.3.7| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Rear Suspension arm ball joint excessively worn swing arm bushes worn (5.3.4 (a) (i)) | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Front wheel spindle securing nut|s| loose |2.3.5a| | 1 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Position lamp not working When headlight is on high beam (4.2.1 (a)) | 1 |
| Central Rear Suspension arm ball joint excessively worn (5.3.4 (a) (i)) | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Brake pedal insecure (1.1.2 (e) (i)) | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Throttle operating incorrectly Binding and failure to completely return to the stop |6.2.1f| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Rear Lower Suspension component pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Front Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Central Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Central Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Rear Brake locking device insecure |3.2.A1e| | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Headlamp insecure |4.1.1 |c|| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Fuel cap sealing washer missing |7.2.2c| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride Clutch lever pivot bolt nut missing. |6.2.1h| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Nearside Rear Drive chain worn to excess |6.2.1e| | 1 |
| Nearside Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Nearside Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Wheel damaged significantly reducing the original strength |4.2.1a| | 1 |
| Rear Fairings insecure and likely to impede the steering Rear Mudguard Loose |2.1.2e| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies Rear Brake Light in-op when brakes applied both front and rear |1.3.1a| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear 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 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Offside Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Offside Brake pedal insecure |3.1.2a| | 1 |
| Headlamp light intensity severely reduced |4.1.4 |a|| | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Rear Brake master cylinder insecure (1.1.10 (c)) | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Central Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Brake locking device missing clevis and split pin was missing |3.2.A1e| | 1 |
| Rear mono-shock insecure |2.4.B.4| | 1 |
| Front Headlamp damaged and function impaired |1.2.3a| | 1 |
| Direction indicator missing |1.5.1a| | 1 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Front Chain guard insecure |6.2.1c| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear spring incomplete |2.4.A1b|i|| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Rear Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Headlamp at least one does not illuminate on dipped beam goes out when headlamp is tapped |1.2.2a|i|| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Central Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Central Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Central Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Central Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Central Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Central Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Offside Front Brake pedal insecure |3.1.2a| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front position lamp missing |1.1.1a| | 1 |
| Headlamp missing |1.2.3a| | 1 |
| Rear Brake cylinder insecurely mounted |3.2.B1a| | 1 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |