| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 51 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 48 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 29 |
| Drive chain excessively loose |6.2.1d| | 25 |
| Registration plate issues | 25 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 21 |
| Throttle operating incorrectly |6.2.1f| | 19 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 19 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 17 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 16 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 15 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 15 |
| Drive chain worn to excess |6.2.1e| | 14 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 13 |
| Front Brake excessively binding (1.2.1 (f)) | 13 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 9 |
| Horn not working |1.7.3a| | 8 |
| Front wheel bearings have excessive free play |2.3.5b| | 8 |
| Headlamp aim beam image kick up to the offside |1.6| | 8 |
| Steering headbearing has excessive free play |2.2.2| | 7 |
| Direction indicators not working |1.5.1c| | 7 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 6 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 6 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 6 |
| Rear reflector on motorcycle missing |1.4.1| | 5 |
| Drive chain excessively tight |6.2.1d| | 5 |
| Rear Wheel corroded significantly reducing the original strength |4.2.1a| | 5 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 5 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 5 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 5 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Rear Wheel fractured significantly reducing the original strength |4.2.1a| | 4 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 4 |
| Stop lamp remains on when the brakes are released | 4 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 4 |
| Rear Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 3 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 3 |
| Offside Front Direction indicators not working |1.5.1c| | 3 |
| Rear Wheel spoke excessively loose |4.2.1b| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Headlamp switch faulty |1.2.4| | 3 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 3 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Front Brake excessively binding |1.2.1 |f|| | 3 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 3 |
| Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Front Wheel spoke excessively loose |4.2.1b| | 3 |
| Nearside Front Direction indicator not working |1.5.1c| | 3 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 3 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Rear Position lamp not working |4.2.1 |a|| | 2 |
| Rear Stop lamp missing |1.3.3a| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 2 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 2 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 2 |
| Offside Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Front Plate brake test indicates a binding brake |3.3.B1a| | 2 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Rear Direction indicator insecure |1.5.3b| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Brake linked system has a seized caliper pivot. |3.2.B5| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Rear Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 2 |
| Front Upper Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 2 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 2 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 2 |
| Handlebar fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 2 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Rear Brake disc fractured (1.1.14 (a) (ii)) | 2 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 2 |
| Horn not working (7.7 (a)) | 2 |