| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 20 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Rear reflector on motorcycle missing |1.4.1| | 9 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Registration plate lamp issues | 5 |
| Registration plate issues | 4 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 3 |
| Drive chain excessively loose |6.2.1d| | 3 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Horn not working |1.7.3a| | 2 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Rear Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Stop lamp does not illuminate immediately a brake applies Front brake lever (1.3.1a) | 1 |
| Front Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 1 |
| Drive chain worn to excess (6.2.1e) | 1 |
| Offside Rear Footrest missing (6.2.12 (a)) | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Centre Front Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Handlebar fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Steering operation restricted in free movement from lock to lock Stiff head race bearings |2.1.4 |c|| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Front Handlebar deformed |2.1.1b| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Rear All position lamps not working |4.2.1 |a|| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Rear Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| 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| | 1 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Stop lamp does not illuminate by the operation of both brake controls not working when applying brake pedal (4.3.2 (a) (iii)) | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Rear Lower Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Offside Front Upper Front suspension assembly component loose |2.3.1| | 1 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Rear Position lamp adversely affected by the operation of another lamp (4.2.3 (b)) | 1 |
| Offside Rear Direction indicator with a multiple light source more than 1/2 not functioning (4.4.1 (a) (ii)) | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Rear Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Handlebar mounting clamp loose |2.1.1a| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Rear position lamp flickers when tapped lightly by hand |1.1.3c| | 1 |
| Stop lamp flickers when tapped lightly by hand |1.3.1d| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |