| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 30 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 16 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 15 |
| Drive chain excessively loose |6.2.1d| | 13 |
| Registration plate issues | 13 |
| Registration plate lamp issues | 9 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 9 |
| Horn not working |1.7.3a| | 8 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 7 |
| Front wheel bearings have excessive free play |2.3.5b| | 7 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 5 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 5 |
| Riders seat insecure |6.2.1a| | 5 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 4 |
| Front position lamp insecure |1.1.1c| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Horn not working (7.7 (a)) | 4 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Offside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 3 |
| Rear Drive chain excessively loose |6.2.1d| | 3 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Sidecar shock absorber seal failed and leaking oil |5.2.4| | 2 |
| Front Position lamp not working (4.2.1 (a)) | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Horn is not a constant note |1.7.3c| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Front Riders seat insecure |6.2.1a| | 2 |
| Front Footrest insecure |6.2.1a| | 2 |
| Front Front mudguard insecure |2.3.7| | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Rear Stop lamp not working front lever (4.3.1 (a) (ii)) | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Direction indicator not working ALL (4.4.1 (a) (ii)) | 1 |
| Stop lamp not working BOTH FRONT AND REAR (4.3.1 (a) (ii)) | 1 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Front Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 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 |
| Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Rear Brake component insecure Reaction bracket secondary fastener missing (1.1.21 (c)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Nearside Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Decelerometer brake test indicates a sticking brake |3.3.E1d| | 1 |
| Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear Brake drum significantly and obviously worn |1.1.14 |a| |i|| | 1 |
| Rear Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Front Riders seat insecure |6.2.5 |a| |ii|| | 1 |
| Front Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Front Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 1 |
| Nearside Footrest insecure |6.2.12 |a|| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Exhaust has part of the system missing |7.1.1a| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| All position lamps adversely affected by the operation of the horn |1.1.3b| | 1 |
| Rear Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Stop lamp affected by the operation of the horn |1.3.2| | 1 |
| Brake back plate|s| insecure |3.2.A1j| | 1 |
| Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Front Brake pedal insecure |3.1.2a| | 1 |
| Front Wheel damaged significantly reducing the original strength |4.2.1a| | 1 |
| Rear Footrest missing both (6.2.12 (a)) | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Rear Brake excessively binding pedal remains stuck on when released (1.2.1 (f)) | 1 |
| Centre Front Lower Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Offside Steering lock stop maladjusted |2.1.3| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Front brake disc in such a condition that it is seriously weakened | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Headlamp insecure |4.1.1 |c|| | 1 |
| Riders seat insecure |6.2.5 |a| |ii|| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Horn control not readily accesible. switch missing |1.7.2a| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Stop lamp missing |1.3.3a| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Rear Brake pedal is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear shock absorber has inadequate damping effect. shock absorber has no damping |2.4.A.3b| | 1 |
| Horn not working horn replaced (7.7 (a) (ii)) | 1 |
| Rear Footrest missing (6.2.12 (a)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Offside Rear Direction indicator incorrect colour (4.4.3 (a)) | 1 |
| Offside Rear Direction indicator lens defective such that the emitted light is adversely affected (4.4.1 (b) (ii)) | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Rear Brake drum insecure (1.1.14 (a) (ii)) | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Offside Footrest missing |6.2.1a| | 1 |
| Offside Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Centre Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Nearside Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Direction indicator insecure |1.5.3b| | 1 |
| Motorcycle structure joining/attachment plate or fastening insecure rear rack (6.1.1 (b) (i)) | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Motorcycle structure is fractured and structural rigidity is significantly reduced rear rack |6.1.1 |a| |i|| | 1 |
| Rear Riders seat insecure (6.2.1a) | 1 |
| Front Horn not working (1.7.3a) | 1 |
| Headlamp insecure (1.2.3b) | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Rear Stop lamp remains on when the brake is released brake lever |1.3.1e| | 1 |
| Horn sound not in accordance with requirements |7.7 |c|| | 1 |
| Rear Brake component insecure no locking split pin |1.1.21 |c|| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Centre Rear Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Centre Rear Upper All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies not working when front brake is applied |1.3.1a| | 1 |
| Stop lamp does not illuminate immediately a brake applies front lever |1.3.1a| | 1 |
| Front Headlamp insecure (4.1.1 (c)) | 1 |
| Front Stop lamp does not illuminate immediately a brake applies front brake switch |1.3.1a| | 1 |
| Rear Brake effort inadequate at a wheel |1.2.1 |a| |i|| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Offside Rear Shock absorber missing (5.3.2 (a) (ii)) | 1 |
| Front Brake disc contaminated oil from fork seal (1.1.14 (b)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Nearside Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Offside Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Front Stop lamp not working switch on front brake (4.3.1 (a) (ii)) | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Offside Rear Brake lever pivot excessively tight |1.1.1 |a|| | 1 |
| Front Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition |8.1.1 |a|| | 1 |
| Nearside Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Headlamp aim not tested |4.1.2 |b|| | 1 |
| Central Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Rear Wheel bearing has excessive play play in rear wheel bearings (5.1.3 (a) (i)) | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |