| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 14 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Horn not working |1.7.3a| | 12 |
| Steering headbearing has excessive free play |2.2.2| | 11 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 10 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 10 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 8 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 7 |
| Fuel system component leaking |7.2.1a| | 6 |
| Fuel system component insecure |7.2.1b| | 5 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 5 |
| Rear reflector on motorcycle missing |1.4.1| | 5 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Drive chain excessively loose |6.2.1d| | 3 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 3 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Rear Rear wheel has a loose wheel nut|s| |4.2.3a| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Rear suspension component loose |2.4.A.1a| | 2 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Rear Brake pedal attachment screws loose |3.1.2b| | 2 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Registration plate issues | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Horn control not functioning. |1.7.2b| | 2 |
| Horn missing |1.7.1| | 2 |
| 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| | 2 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Nearside Steering lock stop maladjusted |2.1.3| | 1 |
| Brake pedal attachment screws loose |3.1.2b| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Front Front mudguard insecure |2.3.7| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Front Front suspension assembly component loose |2.3.1| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Braking system does not have an approriate system/s fitted according to its age |3.1.1| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Central Rear Rear wheel spindle loose |2.4.A.2b| | 1 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Front wheel spindle securing nut|s| loose |2.3.3a| | 1 |
| Front Brake cable excessively corroded |3.2.A1b| | 1 |
| Offside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Steering lock stop missing nearside and offside |2.1.3| | 1 |
| Front Front wheel spindle loose |2.3.5a| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Offside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Nearside Handlebar deformed |2.1.1b| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Brake lever attachment screws loose |3.1.2b| | 1 |
| Front Brake linkage excessively damaged |3.2.A1c| | 1 |
| Front Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Rear Gradient brake test indicates a severely grabbing brake |3.3.D1d| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Gradient brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.D1b| | 1 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Nearside Front Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Centre Front Brake back plate|s| securing bolt|s| loose Front brake plate loose on hub |3.2.A1j| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Front Horn missing |1.7.1| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Front Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Front Footrest insecure |6.2.1a| | 1 |
| Rear Stop lamp light intensity significantly reduced (4.3.3 (a) (ii)) | 1 |
| Front Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Front Brake back plate|s| insecure |3.2.A1j| | 1 |
| Steering lock stop missing |2.1.3| | 1 |
| Nearside Rear Horn not working |1.7.3a| | 1 |
| Offside Front Headlamp at least one does not illuminate on dipped beam hardly illuminates | battery low| |1.2.2a|i|| | 1 |
| Centre Front Headlamp at least one does not illuminate on main beam hardly illuminates |battery low| |1.2.2a|ii|| | 1 |
| Front Front suspension assembly component loose drains |2.3.1| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies very dim |1.3.1a| | 1 |
| Nearside Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Headlamp dipped beam affected by the operation of the horn |1.2.2c| | 1 |
| Sidecar rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Sidecar wheel bearings are excessively rough |5.2.3d| | 1 |
| Sidecar suspension has an insecure unit. |5.2.3a| | 1 |
| Sidecar wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Sidecar wheel spoke excessively bent |4.2.1b| | 1 |
| Offside Outer Front Sidecar attachment insecure |5.1.1b| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Brake locking device insecure |3.2.A1e| | 1 |