| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 55 |
| Headlamp aim out of alignment | 40 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 39 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 28 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 28 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 27 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 26 |
| Registration plate issues | 23 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 22 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 17 |
| Steering headbearing has excessive free play |2.2.2| | 15 |
| Horn not working |1.7.3a| | 13 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 12 |
| Fuel cap sealing washer missing |7.2.2c| | 12 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 11 |
| Riders seat insecure |6.2.1a| | 11 |
| Front wheel bearings have excessive free play |2.3.5b| | 11 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 11 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 10 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 8 |
| Rear reflector on motorcycle obscured |1.4.1| | 8 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 7 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Throttle operating incorrectly |6.2.1f| | 6 |
| Front wheel bearings are excessively rough |2.3.5b| | 6 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Rear reflector missing (4.8.2 (a) (ii)) | 6 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 5 |
| Stop lamp emits other than a steady red light |1.3.1b| | 5 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Headlamp insecure |1.2.3b| | 5 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 4 |
| 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| | 4 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 4 |
| Rear Brake pipe inadequately supported |3.2.B2b| | 4 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Rear Position lamp not working (4.2.1 (a)) | 4 |
| Registration plate lamp issues | 4 |
| Rear Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 4 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Indicator tell tale not functioning |1.5.2| | 3 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 3 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Rear Position lamp light intensity significantly reduced (4.2.3 (a) (ii)) | 3 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 3 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Front suspension has inadequate damping effect. |2.3.6c| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 3 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 3 |
| Rear position lamp deteriorated and function impaired |1.1.1b| | 3 |
| Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition |8.1.1 |a|| | 3 |
| Rear Brake excessively binding (1.2.1 (f)) | 2 |
| Front Brake disc contaminated (1.1.14 (b)) | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Headlamp aim not tested (4.1.2 (b)) | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Headlamp light intensity severely reduced (4.1.4 (a)) | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Nearside Direction indicator not working |1.5.1c| | 2 |
| Upper Steering headbearing has excessive free play |2.2.2| | 2 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Front Headlamp light intensity severely reduced (4.1.4 (a)) | 2 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| Rear position lamp damaged and function impaired |1.1.1b| | 2 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Rear position lamp incorrect colour |1.1.2b| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Nearside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Front Direction indicator insecure |1.5.3b| | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Centre Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 2 |