| Most common failures | No# failures |
|---|
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 22 |
| Steering headbearing has excessive free play |2.2.2| | 20 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 20 |
| Headlamp aim out of alignment | 18 |
| Horn not working |1.7.3a| | 18 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 18 |
| 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| | 14 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 11 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 10 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 9 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 8 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 7 |
| Registration plate issues | 5 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 4 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 4 |
| Front Steering headbearing has excessive free play |2.2.2| | 3 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 3 |
| Front Horn not working |1.7.3a| | 3 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 3 |
| Rear reflector on motorcycle missing |1.4.1| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 2 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 2 |
| Front Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Headlamp switch faulty |1.2.4| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 2 |
| Rear position lamp deteriorated and function impaired |1.1.1b| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 2 |
| Brake performance not tested |3.3| | 2 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 2 |
| Fuel system component leaking |7.2.1a| | 2 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Headlamp dipped beam flickers when tapped lightly by hand |1.2.2c| | 2 |
| Fuel pipe leaking |7.2.1a| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Rear Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Throttle operating incorrectly |6.2.1f| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Rear wheel has a missing wheel nut|s| |4.2.3a| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Rear Gradient brake test indicates a sticking brake |3.3.D1c| | 2 |
| Fuel hose leaking |7.2.1a| | 2 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Sidecar front position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Rear wheel insecure |4.2.3b| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Plate brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.B2b| | 2 |
| Nearside Steering lock stop ineffective |2.1.3| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Fairing so located that it is likely to impede the steering |2.1.2e| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Rear Gradient brake test indicates a severely grabbing brake |3.3.D1d| | 1 |
| Front Gradient brake test indicates a binding brake |3.3.D1c| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Brake lever attachment screws loose |3.1.2b| | 1 |
| Stop lamp does not illuminate immediately a brake applies stop lamp inop |1.3.1a| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Front wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Rear Brake linkage excessively damaged |3.2.A1c| | 1 |
| Front Front position lamp flickers when tapped lightly by hand |1.1.3c| | 1 |
| Rear Plate brake test indicates a severely grabbing brake |3.3.B1b| | 1 |
| Rear Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Seat insecure |6.2.1a| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Brake lever is inoperative |3.1.3c| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Front Front position lamp does not illuminate immediately when switched on dipped beam |1.1.3a| | 1 |
| Rear Exhaust has part of the system missing |7.1.1a| | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Brake drum|s| insecure |3.2.A1g| | 1 |
| Front suspension assembly has excessive free play in the pivot bearings. |2.3.2| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front Built up wheel has a bolt/s missing |4.2.1c| | 1 |
| Front Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Rear Brake linkage has abnormal movement due to excessive wear |3.2.A1i| | 1 |
| Rear Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| 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 |
| Front Horn control not functioning. |1.7.2b| | 1 |
| Front Front suspension spring worn and seriously weakened |2.3.2b| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking Lamp bar on frame |6.1.1c| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 1 |
| Headlamp main beam affected by the operation of the horn |1.2.2c| | 1 |
| Rear position lamp adversely affected by the operation of the horn |1.1.3b| | 1 |
| Headlamp dipped beam affected by the operation of the horn |1.2.2c| | 1 |
| Front Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Front Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Rear Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Front Headlamp damaged and function impaired |1.2.3a| | 1 |
| Offside Front Brake locking device missing |3.2.A1e| | 1 |
| Front Gradient brake test indicates a severely juddering brake |3.3.D1d| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Front position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Front Brake cable excessively corroded |3.2.A1b| | 1 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Front Brake reaction bracket insecure |3.2.A1j| | 1 |
| Sidecar rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Brake lever pivots excessively worn |3.1.3a| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Fuel tank leaking |7.2.1a| | 1 |
| Rear Upper Brake locking device missing clevis pin on rear brake pedal |3.2.A1e| | 1 |
| Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Rear Brake pedal insecure |3.1.2a| | 1 |
| Rear Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Front position lamp flickers when tapped lightly by hand |1.1.3c| | 1 |
| Rear Brake lever excessively damaged |3.2.A1c| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Braking system does not have an approriate system/s fitted according to its age |3.1.1| | 1 |
| Horn missing |1.7.1| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Brake pedal attachment screws loose |3.1.2b| | 1 |
| Rear Brake cable badly frayed |3.2.A1b| | 1 |
| Front Brake cable badly frayed |3.2.A1b| | 1 |
| Rear Gradient brake test indicates a severely juddering brake |3.3.D1d| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Rear Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Fuel system component leaking fuelm running out from carb top |7.2.1a| | 1 |
| Front Motorcycle structure joining/attachment plate or fastening insecure fender insecure (6.1.1 (b) (i)) | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |