| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 21 |
| Rear reflector on motorcycle missing |1.4.1| | 20 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 10 |
| Horn not working |1.7.3a| | 9 |
| Steering headbearing has excessive free play |2.2.2| | 8 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 7 |
| Front Direction indicators not working |1.5.1c| | 6 |
| Drive chain excessively loose |6.2.1d| | 6 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 6 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 6 |
| Registration plate issues | 6 |
| Rear Direction indicators not working |1.5.1c| | 5 |
| Direction indicators not working |1.5.1c| | 5 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 5 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 4 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 4 |
| Front Wheel spoke excessively loose |4.2.1b| | 4 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Nearside Rear Footrest missing |6.2.1a| | 4 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Headlamp aim not tested |1.6| | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Front Stop lamp missing |1.3.3a| | 3 |
| Rear Wheel spoke excessively loose |4.2.1b| | 3 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Rear Footrest missing |6.2.1a| | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Offside Rear Footrest missing |6.2.1a| | 3 |
| Front suspension has inadequate damping effect. |2.3.6c| | 3 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Rear Brake locking device missing |3.2.A1e| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Offside Rear Direction indicator not working |1.5.1c| | 3 |
| Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| 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| | 3 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Front Brake lever mounting insecure |3.1.2a| | 2 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 2 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 2 |
| Nearside Direction indicator not working |1.5.1c| | 2 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Rear 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| | 2 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| Front Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| Front wheel has a loose wheel nut|s| |4.2.3a| | 2 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Rear Drive chain excessively loose |6.2.1d| | 2 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Brake locking device missing |3.2.A1e| | 2 |
| Front Direction indicator not working |1.5.1c| | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Fuel system component leaking |7.2.1a| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Horn not working (7.7 (a)) | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Rear Motorcycle structure corroded to the extent that the rigidity of the assembly is significantly reduced (6.1.1 (c) (i)) | 1 |
| Centre Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Nearside Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Offside Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Front Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Handlebar mounting clamp loose |2.1.1a| | 1 |
| Front Handlebar deformed |2.1.1b| | 1 |
| Front suspension assembly component cracked |2.3.1| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Direction indicators not working All |1.5.1c| | 1 |
| Stop lamp does not illuminate immediately a brake applies when operated by both controls |1.3.1a| | 1 |
| Seat insecure passenger |6.2.1a| | 1 |
| Fuel pipe leaking |7.2.1a| | 1 |
| Horn sound not in accordance with requirements |7.7 |c|| | 1 |
| All direction indicators adversely affected by the operation of another lamp |4.4.3 |b|| | 1 |
| Steering headbearing excessively stiff or notchy notchy |2.2.2 |f| |i|| | 1 |
| Rear Wheel spoke excessively loose Multiple spokes in rear wheel loose |5.2.2 |d|| | 1 |
| Front Wheel spoke excessively loose 1 spoke excessively loose |5.2.2 |d|| | 1 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Rear Drive chain sprocket so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Nearside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Direction indicator affected by the operation of another lamp |All| |1.5.1c| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Front Wheel excessively distorted (5.2.2 (c) (i)) | 1 |
| Rear Wheel bearing play so excessive that directional control is impaired (5.1.3 (a) (ii)) | 1 |
| Rear Suspension component pin or bush excessively worn swinging arm (5.3.4 (a) (i)) | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Rear suspension component seized |2.4A2a|ii|| | 1 |
| Nearside Rear Drive chain excessively tight |6.2.1d| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Nearside Rear Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Front Motorcycle structure excessively distorted |6.1.1a| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Offside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front wheel spindle loose |2.3.5a| | 1 |
| Front wheel spindle securing nut locking device insecure |2.3.5a| | 1 |
| Rear Suspension component pin or bush excessively worn |5.3.4 |a| |i|| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Nearside Drive chain excessively loose |6.2.1d| | 1 |
| Nearside Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Centre Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Offside Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Offside Rear Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Direction indicator insecure |1.5.3b| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Fuel cap sealing washer missing |7.2.2c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Rear Brake locking device insecure |3.2.A1e| | 1 |
| Rear Brake rod excessively damaged |3.2.A1c| | 1 |
| Rear Brake drum|s| securing bolt|s| loose |3.2.A1g| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Front Decelerometer brake test indicates a sticking brake |3.3.E1d| | 1 |
| Front Brake cable badly frayed |3.2.A1b| | 1 |
| Front Brake lever is inoperative |3.1.3c| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Rear Wheel spoke missing |4.2.1b| | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Suspension arm pin or bush excessively worn Swinging arm bearings (5.3.4 (a) (i)) | 1 |
| Front Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Throttle operating incorrectly sticking |6.2.1f| | 1 |
| Stop lamp does not illuminate immediately a brake applies both |1.3.1a| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 1 |
| Rear Brake pedal insecure |3.1.2a| | 1 |
| Rear Suspension component attachment bracket/mounting likely to fail swinging arm was loose (5.3.3 (b) (ii)) | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Offside Brake reaction bracket insecure |3.2.A1j| | 1 |
| Upper Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Front Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Wheel alignment incorrect which adversely affects the steering |2.5.1| | 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 |
| Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Front Upper Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Nearside Rear Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Front Upper Horn not working |1.7.3a| | 1 |
| Front Upper Direction indicators not working |1.5.1c| | 1 |
| Nearside Rear Upper Direction indicators not working |1.5.1c| | 1 |
| Nearside Front Upper Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Nearside Front Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Nearside Rear Lower Chain guard insecure |6.2.1c| | 1 |
| Nearside Front Lower Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Nearside Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Nearside Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Direction indicator missing |1.5.1a| | 1 |
| Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Rear Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Fuel system component leaking Carb (6.1.3 (b) (i)) | 1 |
| Centre Front Horn not working (1.7.3a) | 1 |
| Centre Front Direction indicators not working (1.5.1c) | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 1 |
| Centre Front Steering movement excessively notchy with the weight on the lower bearing (2.2.1a) | 1 |
| Centre Rear wheel bearings have excessive free play (2.4.A.2c) | 1 |
| Offside Rear Drive chain sprocket worn to excess (6.2.1e) | 1 |
| Centre Rear Footrest insecure (6.2.1a) | 1 |
| Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 1 |
| Offside Footrest insecure (6.2.1a) | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Brake clevis joint insecure (1.1.15 (c)) | 1 |
| Nearside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |