| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 27 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 21 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 18 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 18 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 15 |
| Registration plate issues | 12 |
| Horn not working |1.7.3a| | 11 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 11 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 7 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 7 |
| 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| | 7 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 7 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 6 |
| Headlamp dipped beam affected by the operation of the horn |1.2.2c| | 6 |
| Throttle operating incorrectly |6.2.1f| | 6 |
| Steering headbearing has excessive free play |2.2.2| | 5 |
| Headlamp main beam affected by the operation of the horn |1.2.2c| | 5 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Rear position lamp adversely affected by the operation of the horn |1.1.3b| | 3 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Front suspension assembly component loose |2.3.1| | 3 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Stop lamp affected by the operation of the horn |1.3.2| | 3 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 3 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear Brake pedal insecure |3.1.2a| | 2 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Front wheel has a loose wheel nut|s| |4.2.3a| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Horn missing |1.7.1| | 1 |
| Rear Exhaust mounting missing |7.1.1c| | 1 |
| Offside Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Front suspension assembly component loose |2.3.1| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Position lamp switch faulty |1.1.4a| | 1 |
| Rear Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Front Brake reaction bracket insecure |3.2.A1j| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Centre Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Front Brake locking device missing |3.2.A1e| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Offside Steering lock stop maladjusted |2.1.3| | 1 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Nearside Front suspension assembly component loose |2.3.1| | 1 |
| Front Built up wheel has a loose bolt/s |4.2.1c| | 1 |
| Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Front wheel spindle loose |2.3.3a| | 1 |
| Front Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Rear Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Front Headlamp dipped beam affected by the operation of the horn |1.2.2c| | 1 |
| Front Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Nearside Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Offside Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Fuel hose leaking |7.2.1a| | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Outer Rear Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Centre Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front position lamp adversely affected by the operation of the horn |1.1.3b| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Offside Rear 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 |
| Upper Fuel cap sealing washer missing |7.2.2c| | 1 |
| Offside Rear Upper Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Offside Rear Lower Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Offside Front Upper Front suspension has an inadequate repair of a load bearing member or its supporting structure. |2.3.8| | 1 |
| Front suspension fouling which affects the movement of the front suspension. |2.3.6a| | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Rear Gradient brake test indicates a binding brake |3.3.D1c| | 1 |
| Fuel tank insecure missing tank strap |6.1.3 |a| |i|| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Front All position lamps adversely affected by the operation of the horn |1.1.3b| | 1 |
| Centre Front Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Centre Front Lower Horn not working |1.7.3a| | 1 |
| Rear Lower Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Front Front wheel spindle securing nut locking device insecure |2.3.3a| | 1 |
| Rear Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Rear Upper Riders seat insecure |6.2.1a| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Front Brake pipe likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Brake back plate|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Rear Brake lining|s| contaminated by oil or grease |3.2.A1k| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Rear Rear position lamp incorrect colour |1.1.2b| | 1 |
| Centre Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Offside Rear Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Rear Exhaust has part of the system missing |7.1.1a| | 1 |
| Offside Front wheel spindle securing nut|s| loose |2.3.3a| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Wheel fixing loose |single fixing| |5.2.1 |a| |ii|| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Offside Front wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |