| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 35 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 14 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 12 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 10 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 9 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 9 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 8 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 8 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 8 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 8 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 8 |
| Registration plate issues | 8 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Stop lamp remains on when the brake is released |1.3.1e| | 6 |
| Motorcycle structure excessively corroded |6.1.1a| | 6 |
| Front wheel bearings are excessively rough |2.3.5b| | 6 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 5 |
| Rear reflector on motorcycle missing |1.4.1| | 5 |
| Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 4 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 4 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 4 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 4 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 4 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Lower Motorcycle structure excessively corroded |6.1.1a| | 4 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 4 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 3 |
| Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Front Steering headbearing has excessive free play |2.2.2| | 3 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 3 |
| Horn not working |1.7.3a| | 3 |
| Exhaust excessively deteriorated |7.1.1a| | 3 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 3 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Nearside Steering lock stop ineffective |2.1.3| | 2 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 2 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Front Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Front wheel insecure |4.2.3b| | 2 |
| Horn is not continous or uniform |1.7.3c| | 2 |
| Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 2 |
| Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Nearside Brake lever mounting insecure |3.1.2a| | 2 |
| Centre Rear Lower Rear reflector on motorcycle missing |1.4.1| | 2 |
| Nearside Front Direction indicator insecure |1.5.3b| | 2 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Centre Lower Motorcycle structure excessively corroded |6.1.1a| | 2 |
| Steering linkage has excessive free play |2.2.2| | 2 |
| Rear position lamp damaged and function impaired |1.1.1b| | 2 |
| Front Brake cable excessively corroded |3.2.A1b| | 2 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 2 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 2 |
| Rear Lower Motorcycle structure excessively corroded |6.1.1a| | 2 |
| All direction indicators adversely affected by the operation of another lamp (4.4.3 (b)) | 2 |
| Offside Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Rear position lamp obscured more than 50% |1.1.1d| | 1 |
| Front Direction indicator insecure |1.5.3b| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Centre Rear Brake cable badly frayed |3.2.A1b| | 1 |
| Centre Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Offside Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Front Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Front mudguard can easily contact any fixed point of the motor bicycle. |2.3.7| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Direction indicators affected by the operation of another lamp all stop flashing with stop light on |1.5.1c| | 1 |
| Offside Rear Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Offside Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Brake lever attachment screws loose |3.1.2b| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Rear wheel has a missing wheel nut|s| |4.2.3a| | 1 |
| Rear Rear suspension component loose |2.4.A.1a| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Front Steering damper ineffective |2.1.2d| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Nearside Horn not working |1.7.3a| | 1 |
| Nearside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Rear Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Nearside Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Offside Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Front Plate brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.B1c| | 1 |
| Rear Plate brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.B1c| | 1 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Nearside Front Lower Front suspension spring worn and seriously weakened |2.3.2b| | 1 |
| Rear Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Nearside Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Nearside Front Front suspension assembly component loose |2.3.1| | 1 |
| Rear Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Front Front wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Front suspension assembly component excessively bent |2.3.1| | 1 |
| Rear Brake lever attachment screws loose |3.1.2b| | 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 |
| Front Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Front Brake cable badly frayed |3.2.A1b| | 1 |
| Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Centre Rear Lower Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Centre Rear Lower Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear position lamp adversely affected by the operation of the horn |1.1.3b| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Centre Rear Riders seat insecure |6.2.1a| | 1 |
| Centre Front Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear Brake locking device insecure |3.2.A1e| | 1 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Rear Brake component is excessively corroded |3.1.5| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Offside Brake lever mounting insecure |3.1.2a| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Fuel cap sealing washer missing |7.2.2c| | 1 |
| Nearside Front Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Front Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Rear Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Rear Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front suspension assembly excessive wear or free play in a front suspension component fork bushes |2.3.4| | 1 |
| Central Lower Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Centre Rear Upper Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Nearside Front Upper Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Centre Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling Front forks twisted in yokes |2.4 |a|| | 1 |
| Nearside Brake lever insecure |3.1.2a| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Rear Brake cable excessively corroded |3.2.A1b| | 1 |
| Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Front Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 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 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Offside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Brake lever insecure |3.1.2a| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Offside Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Brake lever pivots excessively worn |3.1.3a| | 1 |
| Front Front suspension assembly component excessively bent |2.3.1| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Nearside Lower Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Offside Lower Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Front Brake lever cracked |3.1.2c| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Centre Riders seat insecure |6.2.1a| | 1 |
| Stop lamp affected by the operation of another lamp flashing with indicators |1.3.2| | 1 |
| Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 1 |
| Fuel system component leaking |6.1.3 |b| |i|| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Front Front suspension assembly component excessively corroded. |2.3.1| | 1 |
| Front Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Nearside Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Rear Upper An item not tested |Manual| | 1 |
| Front Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Roller brake test indicates a sticking brake Front |3.3.A1a| | 1 |
| Nearside Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Motorcycle structure corroded to the extent that the rigidity of the assembly is significantly reduced (6.1.1 (c) (i)) | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| All direction indicators light intensity significantly reduced (4.4.3 (a)) | 1 |