| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 25 |
| Steering headbearing has excessive free play |2.2.2| | 13 |
| 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 |
| Horn not working |1.7.3a| | 10 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 10 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 10 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 8 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Throttle operating incorrectly |6.2.1f| | 6 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 6 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 6 |
| Registration plate issues | 5 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 4 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Headlamp dipped beam affected by the operation of the horn |1.2.2c| | 4 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Headlamp main beam affected by the operation of the horn |1.2.2c| | 3 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 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 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Brake hose excessively deteriorated | 2 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 2 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 2 |
| Front Brake lever has insufficient reserve travel |1.1.2 |a|| | 2 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Offside Front Front suspension assembly component loose |2.3.1| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Offside Front Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Registration plate lamp issues | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Brake locking device insecure |3.2.A1e| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Rear Brake cable badly frayed |3.2.A1b| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Offside Front Steering lock stop ineffective |2.1.3| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Front Front position lamp damaged and function impaired |1.1.1b| | 1 |
| Rear Front position lamp damaged and function impaired |1.1.1b| | 1 |
| Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Position lamp switch faulty |1.1.4a| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Nearside Front Steering lock stop ineffective |2.1.3| | 1 |
| Front Fuel hose leaking |7.2.1a| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Nearside Front Front wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Rear Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Rear Rear wheel insecure |4.2.3b| | 1 |
| Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| All position lamps adversely affected by the operation of the horn |1.1.3b| | 1 |
| Rear Decelerometer brake test indicates a binding brake |3.3.E1d| | 1 |
| Front Front wheel spindle securing nut|s| loose |2.3.5a| | 1 |
| Front Fuel pipe union leaking |7.2.1a| | 1 |
| Front Riders seat insecure |6.2.1a| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Stop lamp affected by the operation of the horn |1.3.2| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Horn missing |1.7.1| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Front Steering linkage has excessive free play |2.2.2| | 1 |
| Centre Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Rear Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Front Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Centre Front Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Centre Front Upper Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Centre Front Horn not working |1.7.3a| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Brake lining|s| contaminated by oil or grease |3.2.A1k| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Offside Front suspension assembly component loose |2.3.1| | 1 |
| Nearside Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear All position lamps adversely affected by the operation of the horn |1.1.3b| | 1 |
| Offside Front Brake hose excessively kinked |3.2.B3a| | 1 |
| Rear Brake pedal has insufficient reserve travel |1.1.2 |a|| | 1 |
| Throttle operating incorrectly Sticking |6.2.7 |a| |i|| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Outer Rear Lower Brake pedal insecure |3.1.2a| | 1 |
| Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Brake pedal mounting insecure |3.1.2a| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Front Brake drum|s| cracked |3.2.A1g| | 1 |
| Gradient brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.D1b| | 1 |