| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 23 |
| Registration plate issues | 11 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 9 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 7 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 7 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 5 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 5 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 5 |
| Offside Rear Direction indicator not working |1.5.1c| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Horn not working |1.7.3a| | 4 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 4 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Drive chain excessively loose |6.2.1d| | 3 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 3 |
| Front suspension assembly has excessive free play in the pivot bearings. |2.3.2| | 3 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Rear Rear shock absorber insecurely mounted |2.4.A.3b| | 2 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Brake pedal pivots excessively worn |3.1.3a| | 2 |
| Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Rear Motorcycle structure excessively corroded |6.1.1a| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Centre Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Offside Front Front suspension assembly has excessive free play in the pivot bearings. |2.3.2| | 1 |
| Nearside Front Front suspension assembly has excessive free play in the pivot bearings. |2.3.2| | 1 |
| Centre Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Centre Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Rear Rear suspension has corrosion which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Offside Rear Rear suspension has corrosion which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 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 |
| Rear Footrest missing |6.2.1a| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Front Front mudguard insecure |2.3.7| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Front Lower Front suspension assembly excessive wear or free play in a front suspension component lower fork bushes |2.3.4| | 1 |
| Front Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Rear Drive chain fouling another component |6.2.1d| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride rear drive chain horse shoe clip fitted incorrectly |6.2.1h| | 1 |
| Front Wheel alignment incorrect which adversely affects the steering interfering with front forks when front suspension fully depressed |2.5.1| | 1 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Central Fuel hose leaking |7.2.1a| | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Registration plate lamp issues | 1 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Front Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear Brake linkage excessively worn Centre stand pivot area worn excessive - Causing brake to lock or not operate correctly (1.1.15 (b)) | 1 |
| Handlebar mounting so insecure that steering is adversely affected Play handlebar mount to fork - Affecting steering operation (2.2.1 (a) (ii)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Brake grabbing severely Play in brake linkage (Lower frame) (1.2.1 (c)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Headlamp aim not tested due to no clear pattern to test (4.1.2 (b)) | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Headlamp light source and lamp not compatible |4.1.4 |c|| | 1 |
| Offside Shock absorber insecurely attached bottom nut missing |5.3.2 |a| |i|| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on blown bulb |1.1.3a| | 1 |
| Nearside Rear Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 1 |
| Nearside Rear Brake drum significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Nearside Front Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Nearside Front Position lamp adversely affected by the operation of another lamp |4.2.3 |b|| | 1 |
| Nearside Rear Valve stem seriously misaligned |5.2.3 |j|| | 1 |
| Offside Rear Lower Wheel spoke cracked. |4.2.1b| | 1 |
| Nearside Rear Wheel spoke missing head of spoke at hub missing |5.2.2 |d|| | 1 |
| Front Direction indicators not working & rear |1.5.1c| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Fuel cap ineffective fuel cap seal spilt |6.1.3 |b| |i|| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Brake pedal pivot excessively worn |1.1.1 |b|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| All direction indicators adversely affected by the operation of another lamp indicators effecting all other lights. including headlight beam pattern (4.4.3 (b)) | 1 |
| Stop lamp adversely affected by the operation of another lamp (4.3.3 (b)) | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride axle nut |6.2.1h| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Rear Brake linkage excessively corroded |3.2.A1c| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Nearside Front Upper Direction indicator not working |1.5.1c| | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Headlamp aim not tested dip beam inop |1.6| | 1 |
| Headlamp at least one does not illuminate on dipped beam dip beam inop |1.2.2a|i|| | 1 |
| Rear position lamp incorrect colour tail lamp inop |1.1.2b| | 1 |
| Front wheel spindle securing nut locking device missing wheel spindle locking device is missing |split pin| |2.3.3a| | 1 |
| Wheel has an excessively eccentric bead rim. front wheel rim distorted |4.2.2| | 1 |
| Throttle operating incorrectly engine revs way to high |6.2.1f| | 1 |
| Rear Motorcycle structure excessively corroded shock mounting points |6.1.1a| | 1 |
| Front suspension assembly excessive wear or free play in a front suspension component all pivot points on both leading links |2.3.4| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Nearside Lower Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Horn not working not fitted |7.7 |a| |ii|| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Brake lever mounting insecure |3.1.2a| | 1 |
| Front suspension fouling which affects the movement of the front suspension. |2.3.6a| | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Front Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Rear Brake reaction bracket insecure split pin missing |3.2.A1j| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride missing |6.2.1h| | 1 |
| Rear Wheel spoke excessively loose (5.2.2 (d)) | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Front suspension assembly component loose |2.3.1| | 1 |
| Nearside Rear wheel spindle loose |2.4.A.2b| | 1 |
| Nearside Rear Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Front Front suspension assembly component excessively corroded. |2.3.1| | 1 |
| Front Wheel fixing missing (single fixing) (5.2.1 (a) (ii)) | 1 |
| Rear Wheel fixing missing (single fixing) (5.2.1 (a) (ii)) | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Offside Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Rear Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Front Wheel spindle locking device missing (5.2.1 (d)) | 1 |
| Rear Wheel spindle locking device missing (5.2.1 (d)) | 1 |
| Stop lamp does not illuminate immediately a brake applies both |1.3.1a| | 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 |
| Rear Wheel spoke excessively bent |4.2.1b| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear reflector on motorcycle insecure |1.4.2c| | 1 |
| Nearside Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Offside Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Brake reaction bracket insecure |3.2.A1j| | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Nearside Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |