| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 14 |
| Drive chain excessively loose |6.2.1d| | 8 |
| Stop lamp remains on when the brake is released |1.3.1e| | 7 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 6 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Registration plate issues | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Horn not working |1.7.3a| | 2 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Rear Stop lamp switch with a delay in operation |4.3.2 |a| |ii|| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Rear Brake pedal is inoperative |3.1.3c| | 1 |
| Front Riders seat insecure |6.2.1a| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Front Handlebar mounting clamp loose |2.1.1a| | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Offside Rear Brake pedal is positioned so that 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 |
| Offside Handlebar deformed |2.1.1b| | 1 |
| Offside Rear Brake locking device missing |3.2.A1e| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Nearside Rear Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Chain guard insecure |6.1.7 |i|| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Front Throttle operating incorrectly |6.2.1f| | 1 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front wheel spindle securing nut|s| loose |2.3.3a| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Offside Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Offside Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Drive chain excessively loose |6.2.1d| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |