| Most common failures | No# failures |
|---|
| Registration plate issues | 55 |
| Rear reflector on motorcycle missing |1.4.1| | 44 |
| Headlamp aim out of alignment | 34 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 24 |
| Front wheel bearings have excessive free play |2.3.5b| | 19 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 17 |
| Horn not working |1.7.3a| | 17 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 13 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 13 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 12 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Steering headbearing has excessive free play |2.2.2| | 11 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 9 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 8 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Throttle operating incorrectly |6.2.1f| | 6 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Front wheel bearings are excessively rough |2.3.5b| | 6 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 5 |
| Front Wheel spoke excessively loose |4.2.1b| | 5 |
| 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| | 5 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Registration plate lamp issues | 5 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 5 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear Wheel spoke excessively loose |4.2.1b| | 4 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 4 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 4 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Fuel system component leaking |7.2.1a| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Drive chain excessively loose |6.2.1d| | 3 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 3 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Wheel spoke cracked. |4.2.1b| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Front Direction indicators not working |1.5.1c| | 2 |
| Rear Direction indicators not working |1.5.1c| | 2 |
| Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 2 |
| Horn is not continous or uniform |1.7.3c| | 2 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Brake lever mounting insecure |3.1.2a| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Direction indicator missing |1.5.1a| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Front Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Steering lock stop ineffective |2.1.3| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Rear Brake linkage clevis joint excessively worn |3.2.A1d| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Centre Front Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Centre Front Lower Steering headbearing has excessive free play |2.2.2| | 1 |
| Outer Front Lower Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Centre Rear Lower Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Front Horn control not functioning. |1.7.2b| | 1 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Headlamp insecure |4.1.1 |c|| | 1 |
| Position lamp not working |4.2.1 |a|| | 1 |
| Stop lamp does not illuminate immediately a brake applies on foot brake |1.3.1a| | 1 |
| Brake lever mounting cracked |3.1.2c| | 1 |
| Front wheel bearings have excessive free play right hand |2.3.5b| | 1 |
| Front Front suspension assembly component missing wheel spindle stud broken/nut missing |2.3.1| | 1 |
| Centre Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Nearside Front Horn not working |1.7.3a| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Centre Rear Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Centre Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Centre Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Exhaust has part of the system missing |7.1.1a| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Brake lever insecure pivot bolt lock nut missing |1.1.2 |e| |i|| | 1 |
| Front position lamp missing |1.1.1a| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Front Horn control defective |1.7.2a| | 1 |
| Centre Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Rear Lower Motorcycle structure cracked |6.1.1a| | 1 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Wheel spoke excessively loose |4.2.1b| | 1 |
| Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 1 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Lower Steering headbearing has excessive free play |2.2.2| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Offside Front Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Upper Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Headlamp dipped beam affected by the operation of the horn |1.2.2c| | 1 |
| Headlamp main beam affected by the operation of the horn |1.2.2c| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front Front mudguard insecure |2.3.7| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Rear Brake lever has restricted free movement |1.1.15 |e|| | 1 |
| Front suspension assembly component loose |2.3.1| | 1 |
| Lower Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Rear Brake caliper|s| insecure |3.2.A1j| | 1 |
| Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Handlebar mounting clamp loose |2.1.1a| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Nearside Front Drive chain worn to excess |6.2.1e| | 1 |
| Nearside Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Headlamp aim not tested |4.1.2 |b|| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Position lamp switch insecure |4.2.2 |b|| | 1 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Rear Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Motorcycle structure excessively corroded n/s lower frame tube |6.1.1a| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Rear Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Brake hose damaged | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Centre Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Offside Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Headlamp damaged and function impaired |1.2.3a| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Offside Front Brake lever mounting insecure |3.1.2a| | 1 |
| Nearside Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Stop lamp missing |1.3.3a| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Offside Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Brake performance not tested REAR BRAKE NOT WORKING (1.2.1 (g)) | 1 |
| Front Suspension arm pin or bush excessively worn SWING ARM BUSHES (5.3.4 (a) (i)) | 1 |
| Rear Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 1 |
| Front Brake caliper inadequately mounted (1.1.16 (c) (i)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| All position lamps not working (4.2.1 (a)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Central Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Central Front Position lamp not working (4.2.1 (a)) | 1 |
| Front Wheel spoke excessively loose (5.2.2 (d)) | 1 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |