| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 121 |
| Rear reflector on motorcycle missing |1.4.1| | 71 |
| Registration plate issues | 37 |
| Horn not working |1.7.3a| | 35 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 28 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 26 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 20 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 18 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 15 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 13 |
| Steering headbearing has excessive free play |2.2.2| | 12 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 11 |
| Exhaust excessively deteriorated |7.1.1a| | 11 |
| Headlamp aim beam image kick up to the offside |1.6| | 10 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 10 |
| Throttle operating incorrectly |6.2.1f| | 9 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 8 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Rear reflector missing (4.8.2 (a) (ii)) | 8 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 7 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 6 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 6 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 6 |
| Rear Wheel spoke excessively loose |4.2.1b| | 6 |
| Rear reflector missing |4.8.2 |a| |ii|| | 6 |
| Front wheel bearings have excessive free play |2.3.5b| | 6 |
| Rear parking brake recording little or no effort | 6 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 5 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 5 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 5 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 5 |
| Headlamp insecure |1.2.3b| | 4 |
| Nearside Front Direction indicator not working |1.5.1c| | 4 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 4 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 4 |
| Riders seat insecure |6.2.1a| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Offside Rear Direction indicators not working |1.5.1c| | 4 |
| Nearside Rear Direction indicator not working |1.5.1c| | 4 |
| Horn not working |7.7 |a| |ii|| | 4 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Front Wheel spoke excessively loose |4.2.1b| | 4 |
| Stop lamp remains on when the brakes are released | 4 |
| Front Brake excessively binding (1.2.1 (f)) | 4 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 3 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 3 |
| Offside Rear Direction indicator not working |1.5.1c| | 3 |
| Nearside Rear Direction indicators not working |1.5.1c| | 3 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 3 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 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 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Front Brake disc|s| cracked |3.2.A1g| | 3 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Rear brake binding | 3 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Horn not working (7.7 (a)) | 3 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 2 |
| Brake lever is positioned so that the brake cannot be readily applied |3.1.3c| | 2 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 2 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 2 |
| Rear Stop lamp deteriorated and function impaired |1.3.3a| | 2 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 2 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Centre Rear Lower Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Offside Rear Footrest insecure |6.2.1a| | 2 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Upper Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Rear Position lamp not working |4.2.1 |a|| | 2 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 2 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 2 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 2 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Offside rear brake recording little or no effort |3.7.B.5a| | 2 |
| Nearside rear brake recording little or no effort |3.7.B.5a| | 2 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 2 |
| Rear Wheel spoke excessively loose (5.2.2 (d)) | 2 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Front Brake disc contaminated (1.1.14 (b)) | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |