| Most common failures | No# failures |
|---|
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 19 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 11 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 11 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 10 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 10 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 10 |
| Headlamp aim out of alignment | 10 |
| Horn not working |1.7.3a| | 7 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 6 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 5 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 3 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 2 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 2 |
| Registration plate issues | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Rear Brake pedal insecure |3.1.2a| | 2 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Offside Steering lock stop ineffective |2.1.3| | 2 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Nearside Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 2 |
| Rear spring worn and seriously weakened |2.4A1b|ii|| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Brake lever attachment screws loose |3.1.2b| | 1 |
| Rear suspension component loose rear hub |2.4.A.1a| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Stop lamp missing |1.3.3a| | 1 |
| Rear wheel has a missing wheel bolt|s| |4.2.3a| | 1 |
| Front suspension assembly excessive wear or free play in a front suspension component front wheel mount |2.3.4| | 1 |
| Rear Built up wheel has a bolt/s missing |4.2.1c| | 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 |
| Fuel system component insecure |7.2.1b| | 1 |
| Throttle operating incorrectly not returning correctly |6.2.1f| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Headlamp damaged and function impaired |1.2.3a| | 1 |
| Offside Front Lower Suspension component pin or bush likely to become detached |5.3.4 |a| |ii|| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear Brake locking device insecure |3.2.A1e| | 1 |
| Front Throttle operating incorrectly |6.2.1f| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front Suspension arm ball joint excessively worn |5.3.4 |a| |i|| | 1 |
| Nearside Front suspension assembly component loose |2.3.1| | 1 |
| Brake rod excessively corroded |3.2.A1c| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Front Brake locking device missing |3.2.A1e| | 1 |
| Front suspension assembly component loose |2.3.1| | 1 |
| Front Brake hose fouling |3.2.B3b| | 1 |
| Front Brake caliper|s| insecure |3.2.A1j| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Centre Front Lower Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Plate brake test No brake control achieves an efficiency of 30%. |3.3.B2a| | 1 |
| Plate brake test Neither brake control achieves an efficiency of 25% |3.3.B2b| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Steering lock stop ineffective |2.1.3| | 1 |
| Nearside Steering lock stop maladjusted |2.1.3| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Front Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 1 |
| Rear Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Front Built up wheel has a bolt/s missing |4.2.1c| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Nearside Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Headlamp main beam affected by the operation of the horn |1.2.2c| | 1 |
| Front suspension spring worn and seriously weakened |2.3.2b| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Rear Brake drum|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear Brake pedal is inoperative |3.1.3c| | 1 |
| Rear Rear suspension component seized |2.4A2a|ii|| | 1 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Front Wheel bearing play so excessive that directional control is impaired |5.1.3 |a| |ii|| | 1 |
| Offside Brake lever insecure |3.1.2a| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Upper Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Front Brake cable has a significantly damaged outer casing. |3.2.A1b| | 1 |
| Front Brake cable damaged (1.1.15 (a)) | 1 |
| Rear Valve stem seriously misaligned (5.2.3 (j)) | 1 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Rear Brake has no recorded effort at a wheel too much travel on rear pedal (1.2.1 (a) (ii)) | 1 |
| Fuel cap leaking (6.1.3 (b) (i)) | 1 |