| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 32 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 16 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 16 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 10 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 9 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 9 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 9 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 8 |
| Horn not working |1.7.3a| | 6 |
| Registration plate issues | 6 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 5 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 5 |
| Brake lever has inadequate reserve travel |3.1.3b| | 5 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 5 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 5 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 4 |
| Riders seat insecure |6.2.1a| | 3 |
| Front wheel spindle loose |2.3.5a| | 3 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 3 |
| Offside Front suspension assembly component loose |2.3.1| | 3 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 2 |
| Headlamp dipped beam affected by the operation of the horn |1.2.2c| | 2 |
| Front Gradient brake test indicates a severely grabbing brake |3.3.D1d| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Front wheel has a loose wheel nut|s| |4.2.3a| | 2 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 2 |
| Front Gradient brake test indicates a sticking brake |3.3.D1c| | 2 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Rear Gradient brake test indicates a binding brake |3.3.D1c| | 2 |
| Front suspension assembly component loose |2.3.1| | 2 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Stop lamp emits other than a steady red light |1.3.1b| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Front Brake back plate|s| insecure |3.2.A1j| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing (2.2.1a) | 1 |
| Gradient brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.D1b| | 1 |
| Offside Steering lock stop missing |2.1.3| | 1 |
| Front Handlebar mounting excessively deteriorated |flexible type| |2.1.1d| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear position lamp adversely affected by the operation of the horn |1.1.3b| | 1 |
| Nearside Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Fuel cap does not fasten securely by a positive means |7.2.2b| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Headlamp main beam affected by the operation of the horn |1.2.2c| | 1 |
| Stop lamp affected by the operation of the horn |1.3.2| | 1 |
| Offside Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Fairing so located that it is likely to impede the steering |2.1.2e| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Rear Wheel corroded significantly reducing the original strength |4.2.1a| | 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 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Stop lamp missing |1.3.3a| | 1 |
| Rear Brake pedal insecure |3.1.2a| | 1 |
| Rear Built up wheel has a loose bolt/s |4.2.1c| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Inner Front Upper Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Centre Front Gradient brake test indicates a sticking brake |3.3.D1c| | 1 |
| Front Brake caliper|s| insecure |3.2.A1j| | 1 |
| Front suspension fouling which affects the movement of the front suspension. |2.3.6a| | 1 |
| Rear wheel insecure |4.2.3b| | 1 |
| Rear wheel has a missing wheel nut|s| |4.2.3a| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Outer Rear Gradient brake test indicates a binding brake |3.3.D1c| | 1 |
| Centre Rear Brake drum|s| securing bolt|s| loose |3.2.A1g| | 1 |
| Brake pedal insecure |3.1.2a| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Rear Brake performance not tested |3.3| | 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 Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Brake pedal insecure securing clip missing from pedal pivot point |3.1.2a| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Nearside Front Front suspension assembly component loose |2.3.1| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Brake disc|s| insecure |3.2.A1g| | 1 |
| Front Brake lever insecure cable fitting insecure to lever |3.1.2a| | 1 |
| Nearside Handlebar handgrip missing |2.1.1c| | 1 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Brake lever mounting insecure |3.1.2a| | 1 |
| Front suspension assembly component loose damper fittings |2.3.1| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Front Brake pipe union leaking fluid |3.2.B4| | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Brake hose excessively deteriorated | 1 |
| Front Brake hose fouling |3.2.B3b| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Front Clutch lever bent so it cannot be readily operated. |6.2.1g| | 1 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Front Fuel cap sealing washer torn |7.2.2c| | 1 |
| Front Leg shield insecure and likely to impede the steering |2.1.2e| | 1 |
| Rear Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front Fuel tank leaking |7.2.1a| | 1 |
| Rear Exhaust has part of the system missing |7.1.1a| | 1 |
| Offside Front Front wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Centre Rear Gradient brake test indicates a sticking brake |3.3.D1c| | 1 |
| Centre Rear Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Centre Front Horn not working |1.7.3a| | 1 |
| Brake reaction bracket insecure |3.2.A1j| | 1 |
| Rear Brake locking device insecure |3.2.A1e| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Front Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| All position lamps adversely affected by the operation of the horn |1.1.3b| | 1 |
| Headlamp incorrect colour |1.2.1| | 1 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Headlamp insecure |1.2.3b| | 1 |