| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 28 |
| Headlamp aim out of alignment | 25 |
| Drive chain excessively loose |6.2.1d| | 22 |
| Registration plate issues | 15 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Horn not working |1.7.3a| | 10 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 10 |
| Drive chain worn to excess |6.2.1e| | 9 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 9 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 9 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 8 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 7 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 7 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 7 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 7 |
| Handlebar deformed |2.1.1b| | 7 |
| Fuel cap sealing washer missing |7.2.2c| | 7 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 6 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 6 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 5 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Brake lever has inadequate reserve travel |3.1.3b| | 5 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 5 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 4 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 4 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 4 |
| Rear Footrest missing |6.2.1a| | 4 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 4 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 4 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Rear Drive chain worn to excess |6.2.1e| | 3 |
| Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 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 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 3 |
| Headlamp aim not tested |1.6| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 3 |
| Offside Rear Direction indicators not working |1.5.1c| | 3 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Rear Brake locking device missing |3.2.A1e| | 2 |
| Rear Shock absorber has an excessively worn bush |5.3.2 |c|| | 2 |
| Front Direction indicators not working |1.5.1c| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Wheel spoke excessively loose |4.2.1b| | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Front position lamp deteriorated and function impaired |1.1.1b| | 2 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 2 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 2 |
| Rear position lamp damaged and function impaired |1.1.1b| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Rear position lamp insecure |1.1.1c| | 2 |
| Fuel cap does not fasten securely by a positive means |7.2.2b| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Front Brake locking device insecure |3.2.A1e| | 2 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Front Brake lever is inoperative |3.1.3c| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Front Lower Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Offside Front Footrest insecure |6.2.1a| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Rear Rear wheel spindle loose |2.4.A.2b| | 1 |
| Front Front suspension assembly component loose |2.3.1| | 1 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Brake reaction bracket excessively worn (1.1.15 (b)) | 1 |
| Headlamp aim not tested engine will not run long enough to test it |4.1.2 |b|| | 1 |
| Stop lamp not working on both controls |4.3.1 |a| |ii|| | 1 |
| Centre Rear Lower Wheel spoke excessively loose |4.2.1b| | 1 |
| Centre Rear Lower Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Nearside Inner Rear Lower Drive chain worn to excess |6.2.1e| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Rear Wheel spoke cracked. |4.2.1b| | 1 |
| Front Wheel spoke excessively bent |4.2.1b| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 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 |
| Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Front suspension assembly component loose |2.3.1| | 1 |
| Rear reflector on sidecar missing |1.4.1| | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Central Rear Suspension arm pin or bush excessively worn mono shock links. (5.3.4 (a) (i)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Rear Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Brake linkage has abnormal movement due to excessive wear |3.2.A1i| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Central Rear Upper Suspension arm pin or bush excessively worn Linkage (5.3.4 (a) (i)) | 1 |
| Central Rear Lower Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Rear wheel bearings are excessively tight |2.4.A.2c| | 1 |
| Rear mono-shock pivot seized |2.4.B.4| | 1 |
| Offside Front Brake cable badly frayed |3.2.A1b| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Nearside Inner Direction indicator insecure |1.5.3b| | 1 |
| Rear Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Position lamp switch insecure |1.1.4b| | 1 |
| Inner Front Lower Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Inner Rear Lower Drive chain excessively loose |6.2.1d| | 1 |
| Inner Rear Lower Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Brake lining(s) less than 1.0 mm thick (1.1.13 (a)) | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Direction indicators flashing less than 60 times a minute All |1.5.1c| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Direction indicator not working all |1.5.1c| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Rear suspension bush has excessive free play shock absorber linkage |2.4.A2a|i|| | 1 |
| Rear Brake back plate|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Rear Brake cable badly frayed |3.2.A1b| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Brake pedal insecure |3.1.2a| | 1 |
| Nearside Front Upper Direction indicators not working |1.5.1c| | 1 |
| Nearside Front Upper Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Front Upper Direction indicator incorrect colour lens brocken |1.5.1b| | 1 |
| Centre Front Upper Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Centre Front Outer Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Centre Front Outer Wheel spoke excessively loose |4.2.1b| | 1 |
| Offside Front Upper Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Centre Rear Inner Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Rear Lower Drive chain worn to excess |6.2.1e| | 1 |
| Nearside Rear Lower Rear wheel insecure |4.2.3b| | 1 |
| Exhaust has part of the system missing |7.1.1a| | 1 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride drive chain link incorrectly fitted |6.2.1h| | 1 |
| Nearside Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Offside Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Centre Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Direction indicator missing |1.5.1a| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Nearside Front suspension assembly component excessively bent |2.3.1| | 1 |
| Offside Front suspension assembly component excessively bent |2.3.1| | 1 |
| Front Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Rear Direction indicator insecure |1.5.3b| | 1 |
| Rear position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Nearside Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Offside Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Offside Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Rear Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Nearside Footrest missing |6.2.1a| | 1 |
| Offside Footrest missing |6.2.1a| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Nearside Rear Rear position lamp insecure |1.1.1c| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 1 |
| Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Upper Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Front Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Offside Rear An item not tested |Manual| | 1 |
| Front Brake performance not tested |3.3| | 1 |
| Front position lamp does not face the front |1.1.1d| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Nearside Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Brake cable knotted |3.2.A1b| | 1 |
| Rear Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Rear Brake back plate|s| insecure |3.2.A1j| | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Rear Suspension component pin or bush excessively worn play in mono shock link (5.3.4 (a) (i)) | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Front Throttle operating incorrectly |6.2.1f| | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Wheel inadequatly repaired significantly reducing the original strength |4.2.1a| | 1 |
| Footrest missing |6.2.1a| | 1 |
| Brake reaction bracket insecure |3.2.A1j| | 1 |
| Vehicle identification number not permanently displayed |6.3.5a| | 1 |
| Stop lamp does not emit a steady light front brake |1.3.1b| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride rear suspension nut loose |6.2.1h| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |