| Most common failures | No# failures |
|---|
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 24 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 23 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 20 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 19 |
| Headlamp aim out of alignment | 17 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 13 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Steering headbearing has excessive free play |2.2.2| | 12 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 10 |
| Registration plate issues | 9 |
| Horn not working |1.7.3a| | 9 |
| Headlamp aim not tested |1.6| | 5 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 5 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 4 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 4 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Front Steering headbearing has excessive free play |2.2.2| | 3 |
| Front Horn not working |1.7.3a| | 3 |
| 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| | 3 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Front position lamp deteriorated and function impaired |1.1.1b| | 2 |
| Front Brake back plate|s| insecure |3.2.A1j| | 2 |
| Handlebar mounting clamp loose |2.1.1a| | 2 |
| Headlamp switch faulty |1.2.4| | 2 |
| Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Centre Front Upper Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Front wheel has a loose wheel nut|s| |4.2.3a| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Front suspension fouling which affects the movement of the front suspension. |2.3.6a| | 1 |
| Front Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Front suspension assembly component excessively bent |2.3.1| | 1 |
| Front Upper Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Offside Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Nearside Front Brake cable has a significantly damaged outer casing. |3.2.A1b| | 1 |
| Stop lamp does not illuminate immediately a brake applies rear brake |1.3.1a| | 1 |
| Front suspension assembly component loose front spindle hub nut insecure |2.3.1| | 1 |
| Throttle operating incorrectly does not return correctly |6.2.1f| | 1 |
| Rear Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Offside Front Throttle operating incorrectly |6.2.1f| | 1 |
| Front Steering linkage has excessive free play |2.2.2| | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Rear Brake effort inadequate at a wheel |1.2.1 |a| |i|| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort low effort, out of adjustment |3.3.A1c| | 1 |
| Centre Rear Lower Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Fuel hose leaking |7.2.1a| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Headlamp dipped beam affected by the operation of the horn |1.2.2c| | 1 |
| Headlamp main beam affected by the operation of the horn |1.2.2c| | 1 |
| Offside Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Nearside Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Service brake: efficiency below requirements |3.7.B.7| | 1 |
| Parking brake: efficiency below requirements |3.7.B.7| | 1 |
| Front Hydraulic brake control creeps under load. |3.1.4a| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Front suspension spring worn and seriously weakened |2.3.2b| | 1 |
| Front Front position lamp incorrect colour |1.1.2a| | 1 |
| Front Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Front Wheel corroded significantly reducing the original strength |4.2.1a| | 1 |
| Rear Fuel pipe leaking |7.2.1a| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Offside Front Lower Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Offside Steering lock stop missing |2.1.3| | 1 |
| Front Brake lever attachment screws loose |3.1.2b| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Floor brake test Neither brake control achieves an efficiency of 25% |3.3.C1b| | 1 |
| Offside Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Fuel cap sealing washer missing |7.2.2c| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Rear Built up wheel has a bolt/s missing |4.2.1c| | 1 |
| Rear Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Fairings so located that it is likely to impede the steering |2.1.2e| | 1 |
| Rear Built up wheel has a loose bolt/s |4.2.1c| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front wheel spindle loose |2.3.5a| | 1 |
| Front Brake cable has a significantly damaged outer casing. |3.2.A1b| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Offside Front Brake cable badly frayed |3.2.A1b| | 1 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Front suspension assembly component loose |2.3.1| | 1 |
| Front Front mudguard insecure |2.3.7| | 1 |
| Headlamp incorrect colour |1.2.1| | 1 |
| Fairing so located that it is likely to impede the steering |2.1.2e| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Inner Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Centre Front Front position lamp flickers when tapped lightly by hand |1.1.3c| | 1 |
| Centre Front Headlamp incorrect colour |1.2.1| | 1 |
| Centre Front Handlebar mounting clamp loose |2.1.1a| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Front Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Plate brake test No brake control achieves an efficiency of 30%. |3.3.B2a| | 1 |
| Centre Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear wheel insecure |4.2.3b| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Front Front wheel has a missing wheel nut|s| |4.2.3a| | 1 |
| Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Brake component is fractured front cable snapped |3.1.5| | 1 |
| Front Brake locking device insecure |3.2.A1e| | 1 |
| Rear Built up wheel has a bolt/s missing hub flange fractured |4.2.1c| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Fuel system component leaking excessively or a risk of fire (6.1.3 (b) (ii)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |