| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 38 |
| Rear reflector on motorcycle missing |1.4.1| | 18 |
| Registration plate issues | 12 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 9 |
| Drive chain excessively loose |6.2.1d| | 8 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 8 |
| Rear Wheel spoke excessively loose |4.2.1b| | 8 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 7 |
| Front wheel bearings have excessive free play |2.3.5b| | 7 |
| Steering headbearing has excessive free play |2.2.2| | 7 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 7 |
| Drive chain worn to excess |6.2.1e| | 6 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 6 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 6 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 6 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 6 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Nearside Rear Footrest missing |6.2.1a| | 4 |
| Offside Rear Footrest missing |6.2.1a| | 4 |
| Horn not working |1.7.3a| | 4 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 4 |
| Front Wheel spoke excessively loose |4.2.1b| | 4 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Headlamp aim not tested |1.6| | 4 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 4 |
| Rear Drive chain worn to excess |6.2.1e| | 4 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 4 |
| Fuel cap sealing washer missing |7.2.2c| | 3 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 3 |
| Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 3 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Rear Footrest missing |6.2.1a| | 3 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 3 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 2 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Front Brake disc|s| excessively pitted |3.2.A1l| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 2 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 2 |
| Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear Brake locking device missing |3.2.A1e| | 2 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 2 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 2 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 2 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Inner Front Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Inner Front Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Inner Rear Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Front Clutch lever positioned so it cannot be readily operated clamp bolts loose |6.2.7 |b|| | 1 |
| Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear suspension has a fracture of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Front Brake caliper|s| insecure |3.2.A1j| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Horn not working (7.7 (a)) | 1 |
| Front Wheel spoke excessively loose (5.2.2 (d)) | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Front Exhaust excessively deteriorated |7.1.1a| | 1 |
| Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Fuel cap sealing washer torn |7.2.2c| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Front Direction indicator missing |1.5.1a| | 1 |
| Rear Direction indicator missing |1.5.1a| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Front Headlamp main beam flickers when tapped lightly by hand |1.2.2c| | 1 |
| Front Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Brake lever pivots excessively worn |3.1.3a| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Nearside Upper Wheel spoke excessively loose |4.2.1b| | 1 |
| Front Upper Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 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 |
| Outer Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Inner Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Inner Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Nearside Front Chain guard insecure |6.2.1c| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Rear Footrest insecure |6.2.1a| | 1 |
| Front Front wheel spindle securing nut|s| loose |2.3.3a| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear Wheel spoke cracked. |4.2.1b| | 1 |
| Horn replaced by a bell |1.7.3b| | 1 |
| Rear position lamp obscured more than 50% |1.1.1d| | 1 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| An item not tested |Manual| | 1 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| All position lamps adversely affected by the operation of the horn |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 |
| Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Stop lamp affected by the operation of the horn |1.3.2| | 1 |
| Upper Fork yoke in such a condition that steering control is adversely affected yoke centre locking nut loose (2.2.2 (d) (ii)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Brake fluid reservoir fluid level significantly below minimum level (1.1.10 (d) (ii)) | 1 |
| Rear Position lamp adversely affected by the operation of another lamp (4.2.3 (b)) | 1 |
| Rear Footrest missing (6.2.12 (a)) | 1 |
| Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Suspension component ball joint excessively worn rear knuckle (5.3.4 (a) (i)) | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Nearside Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Brake disc|s| excessively pitted |3.2.A1l| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Rear Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Nearside Drive chain excessively tight |6.2.1d| | 1 |
| Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Rear Footrest missing both sides (6.2.12 (a)) | 1 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Front Brake disc|s| securing bolt|s| missing |3.2.A1g| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front position lamp missing |1.1.1a| | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Central Rear Upper Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Central Rear Lower Position lamp light intensity significantly reduced barely visible (4.2.3 (a) (ii)) | 1 |
| Offside Rear Lower Wheel spindle locking device missing (5.2.1 (d)) | 1 |
| Nearside Rear Lower Wheel spindle locking device missing NS spindle clamp bolt on end of swing arm missing (5.2.1 (d)) | 1 |
| Central Rear Upper Stop lamp light intensity significantly reduced barely visible (4.3.3 (a) (ii)) | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Wheel spoke excessively bent |4.2.1b| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Rear Wheel spoke missing |5.2.2 |d|| | 1 |
| Shock absorber has a serious fluid leak both front stansion legs |5.3.2 |b|| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Offside Suspension attachment bracket/mounting insecure fork clamp bolt loose nut missing |5.3.3 |a| |i|| | 1 |