| Most common failures | No# failures |
|---|
| Registration plate issues | 55 |
| Headlamp aim out of alignment | 27 |
| Rear reflector on motorcycle missing |1.4.1| | 22 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 14 |
| 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| | 13 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 7 |
| Headlamp aim beam image kick up to the offside |1.6| | 6 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Horn not working |1.7.3a| | 4 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Front Direction indicator affected by the operation of another lamp |1.5.1c| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Offside 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| | 3 |
| Rear Direction indicator not working |1.5.1c| | 2 |
| Rear Direction indicator incorrect colour |1.5.1b| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Exhaust has part of the system missing |7.1.1a| | 2 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Offside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Brake pipe excessively corroded | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Offside 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 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Stop lamp does not illuminate immediately a brake applies from rear brake |1.3.1a| | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Nearside Front 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 |
| Offside Front Brake hose leaking fluid |3.2.B4| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Offside Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Offside Rear Brake disc fractured (1.1.14 (a) (ii)) | 1 |
| Central Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Rear Wheel spoke missing |4.2.1b| | 1 |
| Rear Footrest missing (6.2.12 (a)) | 1 |
| Front Brake caliper inadequately mounted (1.1.16 (c) (i)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Front Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator missing |1.5.1a| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Brake caliper insecurely mounted and braking performance affected (1.1.16 (c) (ii)) | 1 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Brake hose excessively deteriorated | 1 |
| Offside Front Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Offside Front Throttle operating incorrectly |6.2.1f| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Pillion seat insecure (6.2.6 (a) (ii)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Offside Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Offside Rear Direction indicator likely to become detached looose |4.4.1 |c| |ii|| | 1 |
| Rear Wheel bearing play so excessive it is likely to break up excessive play rear wheel |5.1.3 |a| |ii|| | 1 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Stop lamp missing |1.3.3a| | 1 |
| Offside Front 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 |
| Headlamp aim projected beam image obviously incorrect right dipping (4.1.2 (c)) | 1 |
| All direction indicators missing (4.4.1 (a) (ii)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Nearside Rear Upper Direction indicators not working |1.5.1c| | 1 |
| Offside Rear Lower 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 indicators not working |1.5.1c| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Exhaust has part of the system missing |7.1.1a| | 1 |
| Brake master cylinder severely damaged |3.2.B1b| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Nearside Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Front Headlamp aim not tested headlamp not working |1.6| | 1 |