| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 6 |
| Horn not working |1.7.3a| | 4 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Offside Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Drive chain excessively loose |6.2.1d| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Offside Exhaust excessively deteriorated |7.1.1a| | 2 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Front Headlamp switch faulty |1.2.4| | 1 |
| Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Brake cable guide defective and affecting operation (1.1.15 (d)) | 1 |
| Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Front Wheel spoke excessively loose (5.2.2 (d)) | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Offside Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Front Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Chain guard fouling another component |6.2.1c| | 1 |
| Direction indicator not working all |1.5.1c| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Lower Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Rear Wheel spoke missing |4.2.1b| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Front Brake linkage has restricted free movement |1.1.15 |e|| | 1 |
| Front Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Nearside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Rear Wheel spoke cracked. |4.2.1b| | 1 |
| Front Wheel spindle loose (5.2.1 (c) (i)) | 1 |
| Rear Position lamp not working bulb blown (4.2.1 (a)) | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Chain guard missing |6.2.1c| | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Rear Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Brake component defective due to a deliberate modification which significantly reduces the original strength |3.1.5| | 1 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Rear suspension has corrosion which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Front wheel spindle securing nut locking device insecure |2.3.3a| | 1 |
| Front position lamp missing |1.1.1a| | 1 |
| Fairings so located that it is likely to impede the steering clutch & front brake lever foul fairing on full lock |2.1.2e| | 1 |
| Rear Footrest insecure |6.2.1a| | 1 |