| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 33 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 9 |
| Registration plate issues | 9 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 7 |
| Horn not working |1.7.3a| | 7 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Rear reflector on motorcycle missing |1.4.1| | 4 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Brake locking device missing |3.2.A1e| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 3 |
| 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| | 3 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 2 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 2 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Drive chain excessively loose |6.2.1d| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Upper Fuel cap mounting flange/sealing method defective |7.2.2c| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 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 Front Lower Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front Horn not working |7.7 |a| |ii|| | 1 |
| Nearside Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Wheel spindle loose |5.2.1 |c| |i|| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Rear Wheel spindle or securing nut(s) so insecure that wheel security or steering control is adversely affected (5.2.1 (c) (ii)) | 1 |
| Centre Rear Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Handlebar deformed to the extent that steering is affected (2.2.1 (c) (ii)) | 1 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Rear Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Fuel cap mounting flange/sealing method defective |7.2.2c| | 1 |
| Rear Brake lever excessively corroded |3.2.A1c| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Fairing so located that it is likely to impede the steering |2.1.2e| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Rear position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Rear wheel rotation likely to be impeded o/s saddle bag |6.2.1b| | 1 |
| Rear wheel rotation likely to be impeded speedo / brake cable fouling wheel |6.2.1b| | 1 |
| Stop lamp affected by the operation of another lamp Both |1.3.2| | 1 |
| Rear Brake locking device missing Split pin |3.2.A1e| | 1 |
| Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Front Front mudguard insecure |2.3.7| | 1 |
| Front Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Offside Rear Footrest insecure loose |6.2.1a| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Front Brake cable excessively corroded |3.2.A1b| | 1 |
| Nearside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Front Brake locking device insecure |3.2.A1e| | 1 |
| Front wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Lower Fuel system component leaking |7.2.1a| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front Brake cable damaged |1.1.15 |a|| | 1 |
| Rear Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Direction indicator missing |1.5.1a| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Nearside Rear Footrest missing |6.2.12 |a|| | 1 |
| Offside Rear Footrest missing |6.2.12 |a|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride Drive chain link fitted back to front. |6.2.1h| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Rear Wheel spoke cracked. |4.2.1b| | 1 |
| Rear All position lamps not working |4.2.1 |a|| | 1 |
| Rear suspension has an inadequate repair of a load bearing member or its supporting structure. rear swing arm securing nut loose and has no locking devise |split pin missing| |2.4.A.2d| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Direction indicators affected by the operation of another lamp all |1.5.1c| | 1 |
| Upper Steering lock stop missing |2.1.3| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Registration plate lamp issues | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front Stop lamp missing |1.3.3a| | 1 |
| Rear position lamp missing |1.1.1a| | 1 |
| Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Central Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Nearside Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Nearside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |