| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 17 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 6 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 5 |
| Rear Wheel spoke excessively loose |4.2.1b| | 3 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 3 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 2 |
| Rear Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 2 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Drive chain excessively loose |6.2.1d| | 2 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Front Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear suspension has corrosion which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Nearside Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Offside Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Front Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Front Footrest insecure |6.2.1a| | 1 |
| Headlamp aim beam image too far to the left |1.6.4| | 1 |
| Front suspension assembly component excessively bent |2.3.1| | 1 |
| Indicator tell tale not operating correctly |1.5.2| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Chain guard fouling another component |6.2.1c| | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Fuel cap sealing washer torn |7.2.2c| | 1 |
| Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Rear Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| 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 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Front suspension assembly has excessive free play in the pivot bearings. |2.3.2| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Centre Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Offside Rear Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Rear Front position lamp insecure |1.1.1c| | 1 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Horn not working |1.7.3a| | 1 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Front Brake lever attachment screws loose |3.1.2b| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Motorcycle structure cracked |6.1.1a| | 1 |
| Nearside Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Front Front position lamp incorrect colour |1.1.2a| | 1 |
| Front Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Front Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Registration plate issues | 1 |
| Offside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Front Steering control handlebar movement restricted by cables caught on a projection |2.1.2c| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Nearside Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Front Horn is not a constant note |1.7.3c| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Rear Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Rear Motorcycle structure excessively corroded |6.1.1a| | 1 |