| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 16 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 9 |
| Horn not working |1.7.3a| | 8 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 7 |
| Registration plate issues | 6 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Nearside Rear Direction indicators not working |1.5.1c| | 6 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 5 |
| Drive chain excessively loose |6.2.1d| | 5 |
| Drive chain worn to excess |6.2.1e| | 5 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 5 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 5 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Direction indicators not working |1.5.1c| | 4 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Nearside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 4 |
| Offside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 4 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Offside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 3 |
| Nearside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 3 |
| Stop lamp remains on when the brakes are released | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Nearside Front Direction indicators not working |1.5.1c| | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Brake locking device missing |3.2.A1e| | 3 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Nearside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 2 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Wheel spoke excessively loose |4.2.1b| | 2 |
| Nearside Rear Direction indicator missing |1.5.1a| | 2 |
| Brake pedal pivots excessively worn |3.1.3a| | 2 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Front position lamp incorrect colour |1.1.2a| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Front Wheel spoke excessively loose |4.2.1b| | 2 |
| Front Wheel has an excessively eccentric bead rim. |4.2.2| | 2 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Offside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Front Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Brake lever cannot be released smoothly |3.1.3d| | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Offside Rear Direction indicator insecure |1.5.3b| | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Motorcycle structure joining/attachment plate or fastening insecure Front down tubes (6.1.1 (b) (i)) | 1 |
| Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Front Front suspension assembly has an insecure fork brace |2.3.4d| | 1 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Nearside Lower Front suspension assembly component loose |2.3.1| | 1 |
| Nearside Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Central Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Rear Wheel spoke excessively loose various spokes loose (5.2.2 (d)) | 1 |
| Rear Wheel spoke cracked (5.2.2 (d)) | 1 |
| Rear Rear suspension component excessively bent |2.4.A.1a| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Nearside Indicator tell tale not functioning |1.5.2| | 1 |
| Rear Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Nearside Rear Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Rear Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Front Front suspension assembly component excessively corroded. |2.3.1| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Lower Motorcycle structure excessively distorted |6.1.1a| | 1 |
| Offside Handlebar handgrip missing |2.1.1c| | 1 |
| Front Fork yoke deformed |2.1.1b| | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Floor brake test Neither brake control achieves an efficiency of 25% |3.3.C1b| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen TAPE added to headlight |1.6.B.1| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Rear Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Front Front mudguard insecure missing |2.3.7| | 1 |
| Front Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Rear Brake rod insecure (1.1.15 (c)) | 1 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Front suspension assembly component loose both fork tops |2.3.1| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Stop lamp adversely affected by the operation of another lamp (4.3.3 (b)) | 1 |
| Front Wheel excessively distorted (5.2.2 (c) (i)) | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Exhaust has part of the system missing |7.1.1a| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Central Rear Upper Stop lamp likely to become detached |4.3.1 |c| |ii|| | 1 |
| Front Steering lock stop ineffective |2.1.3| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Brake pedal mounting insecure |3.1.2a| | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| All direction indicators light intensity significantly reduced (4.4.3 (a)) | 1 |
| All direction indicators adversely affected by the operation of another lamp All indicators stop working with headlight on. (4.4.3 (b)) | 1 |
| Front Headlamp dipped beam affected by the operation of another lamp high & low beam very weak and dims rear position light |1.2.2c| | 1 |
| Central Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Centre Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Offside Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Offside Rear suspension component excessively bent |2.4.A.1a| | 1 |
| Offside Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Nearside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear position lamp deteriorated and function impaired |1.1.1b| | 1 |
| 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 position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Headlamp damaged and function impaired |1.2.3a| | 1 |
| Offside Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Headlamp switch faulty main and dipped beam wrong way round |1.2.4| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.4 |a|| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front All position lamps adversely affected by the operation of the horn |1.1.3b| | 1 |
| Stop lamp affected by the operation of the horn |1.3.2| | 1 |
| Front Wheel spoke excessively corroded |4.2.1b| | 1 |
| Rear Wheel spoke excessively corroded |4.2.1b| | 1 |
| Nearside Rear Drive chain worn to excess |6.2.1e| | 1 |
| Rear Riders seat insecure |6.2.1a| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Gradient brake test indicates a sticking brake |3.3.D1c| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Rear Brake reaction bracket securing bolt|s| missing split pin |3.2.A1j| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Offside Rear Stop lamp missing (4.3.1 (a) (ii)) | 1 |
| Offside Rear Brake locking device missing |3.2.A1e| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Nearside Rear Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Nearside Rear suspension component loose |2.4.A.1a| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Front Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |