| Most common failures | No# failures |
|---|
| Registration plate issues | 58 |
| Rear reflector on motorcycle missing |1.4.1| | 52 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 34 |
| Headlamp aim out of alignment | 31 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 23 |
| Front wheel bearings have excessive free play |2.3.5b| | 18 |
| Rear Wheel spoke excessively loose |4.2.1b| | 16 |
| Horn not working |1.7.3a| | 14 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 14 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 13 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 12 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Front Wheel spoke excessively loose |4.2.1b| | 10 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 10 |
| 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| | 9 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 8 |
| Drive chain worn to excess |6.2.1e| | 8 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 7 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 7 |
| Front wheel bearings are excessively rough |2.3.5b| | 7 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 7 |
| Rear reflector missing (4.8.2 (a) (ii)) | 6 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 5 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Rear Position lamp not working (4.2.1 (a)) | 5 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Headlamp aim not tested |1.6| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Horn not working (7.7 (a) (ii)) | 3 |
| Registration plate lamp issues | 3 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Nearside Footrest insecure |6.2.1a| | 2 |
| Stop lamp deteriorated and function impaired |1.3.3a| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Central Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Drive chain excessively loose |6.2.1d| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Rear Wheel spoke excessively loose |5.2.2 |d|| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 2 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 2 |
| Centre Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| Front Position lamp not working (4.2.1 (a)) | 2 |
| Rear Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Horn missing |1.7.1| | 1 |
| Rear Stop lamp obscured |1.3.1c| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Front Stop lamp does not emit a steady light front stop lamp switch not working propally |1.3.1b| | 1 |
| Nearside Indicator switch insecure |1.5.4| | 1 |
| Front Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Nearside Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Inner Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Nearside Motorcycle structure cracked |6.1.1a| | 1 |
| Inner Front Lower Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Nearside Drive chain excessively loose |6.2.1d| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Centre Lower Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Front Headlamp switch insecure |1.2.4| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Centre Rear Lower Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Centre Front Upper Direction indicators not working |1.5.1c| | 1 |
| Centre Rear Upper Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Front Wheel damaged significantly reducing the original strength |4.2.1a| | 1 |
| Position lamp not working dip |4.2.1 |a|| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Horn missing |1.7.1| | 1 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Wheel spoke excessively loose REAR X 5 |5.2.2 |d|| | 1 |
| Front position lamp missing |1.1.1a| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Throttle operating incorrectly sticking |6.2.7 |a| |i|| | 1 |
| Front Wheel spoke excessively loose |5.2.2 |d|| | 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 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Centre Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Front position lamp flickers when tapped lightly by hand |1.1.3c| | 1 |
| Motorcycle structure corroded to the extent that the rigidity of the assembly is significantly reduced by engine and suspension mount |6.1.1 |c| |i|| | 1 |
| Front Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 1 |
| Rear Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 1 |
| Brake performance not tested |1.2.1 |g|| | 1 |
| Front Brake disc|s| securing bolt|s| loose |3.2.A1g| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Lower Motorcycle structure cracked |6.1.1a| | 1 |
| Centre Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Centre Front Lower Wheel spoke excessively loose |4.2.1b| | 1 |
| Offside Rear Lower Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Brake lever mounting cracked |3.1.2c| | 1 |
| Rear position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Front Upper Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front Lower Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 1 |
| Front All direction indicators missing |4.4.1 |a| |ii|| | 1 |
| Rear All direction indicators missing |4.4.1 |a| |ii|| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Rear reflector on motorcycle incorrectly positioned Fit new reflector on centre line |1.4.2d| | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Front wheel spindle loose |2.3.3a| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Brake hose which buldges |3.2.B4| | 1 |
| Nearside Front Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Nearside Rear Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Nearside Handlebar mounting clamp loose |2.1.1a| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Centre Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Centre Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Rear Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Exhaust has part of the system missing |7.1.1a| | 1 |
| Rear Wheel excessively damaged |5.2.2 |c| |i|| | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Exhaust system insecure (6.1.2 (a)) | 1 |
| Headlamp light source and lamp not compatible new bulb fitted (4.1.4 (c)) | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Fuel system component leaking (6.1.3 (b) (i)) | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Rear Brake has no recorded effort at a wheel (1.2.1 (a) (ii)) | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Rear Brake caliper damaged Rubber bush missing (1.1.16 (a) (i)) | 1 |
| Central Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Front Brake lever has restricted free movement (1.1.15 (e)) | 1 |
| Rear Wheel fractured (5.2.2 (a)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Front Wheel excessively distorted (5.2.2 (c) (i)) | 1 |
| Front Wheel spoke excessively loose (5.2.2 (d)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| All direction indicators missing (4.4.1 (a) (ii)) | 1 |
| Headlamp not working on main beam Stuck on (4.1.1 (a) (ii)) | 1 |