| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 33 |
| Steering headbearing has excessive free play |2.2.2| | 22 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 20 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 18 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 18 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 16 |
| Rear reflector on motorcycle missing |1.4.1| | 15 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 13 |
| Registration plate issues | 12 |
| Riders seat insecure |6.2.1a| | 11 |
| Direction indicators not working |1.5.1c| | 9 |
| Throttle operating incorrectly |6.2.1f| | 8 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 7 |
| Stop lamp remains on when the brake is released |1.3.1e| | 6 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 6 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 6 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 6 |
| Front Brake lever insecure |3.1.2a| | 6 |
| Rear reflector on motorcycle obscured |1.4.1| | 6 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 6 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Front Brake lever mounting insecure |3.1.2a| | 6 |
| Horn not working |1.7.3a| | 6 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 5 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 5 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 5 |
| Nearside Rear Direction indicator not working |1.5.1c| | 5 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Front suspension has inadequate damping effect. |2.3.6c| | 4 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 4 |
| Nearside Front Direction indicator not working |1.5.1c| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 4 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Front Steering headbearing has excessive free play |2.2.2| | 4 |
| Nearside Direction indicator not working |1.5.1c| | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 3 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 3 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 3 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Direction indicator not working |1.5.1c| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 3 |
| Rear Rear wheel insecure |4.2.3b| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Offside Rear Direction indicator not working |1.5.1c| | 3 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 3 |
| Horn control defective |1.7.2a| | 3 |
| Offside Direction indicator not working |1.5.1c| | 3 |
| 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| | 3 |
| Fuel pipe leaking |7.2.1a| | 3 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 3 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 3 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 3 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 2 |
| Nearside Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 2 |
| Fuel system component leaking |7.2.1a| | 2 |
| Headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Nearside Brake lever insecure |3.1.2a| | 2 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Nearside Front Direction indicator missing |1.5.1a| | 2 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 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 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 2 |
| Offside Brake lever insecure |3.1.2a| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Rear Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 2 |
| Indicator tell tale not functioning |1.5.2| | 2 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Front Direction indicator not working |1.5.1c| | 2 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| Front Front suspension assembly component excessively corroded. |2.3.1| | 2 |
| Rear Brake lever insecure |3.1.2a| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Horn sounds harsh or grating |1.7.3c| | 2 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Floor brake test Neither brake control achieves an efficiency of 25% |3.3.C1b| | 2 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Nearside Indicator tell tale not functioning |1.5.2| | 2 |
| Offside Front Direction indicators not working |1.5.1c| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Front Brake locking device missing |3.2.A1e| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Offside Rear Exhaust has part of the system missing |7.1.1a| | 1 |
| Riders seat insecure |6.2.5 |a| |ii|| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Brake hose fouling |3.2.B3b| | 1 |
| Offside Rear Direction indicator missing |1.5.1a| | 1 |
| Front Throttle operating incorrectly |6.2.1f| | 1 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Front Direction indicator missing |1.5.1a| | 1 |
| Nearside Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Brake component is fractured |3.1.5| | 1 |
| Offside Front Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Front Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Nearside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Indicator switch defective |1.5.4| | 1 |
| Front Direction indicator insecure |1.5.3b| | 1 |
| Upper Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Offside Brake lever attachment screws loose |3.1.2b| | 1 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Rear Rear position lamp incorrect colour |1.1.2b| | 1 |
| Rear Brake cable excessively corroded |3.2.A1b| | 1 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Wheel corroded significantly reducing the original strength |4.2.1a| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Lower Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Front Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Upper Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Headlamp missing |1.2.3a| | 1 |
| Fuel cap sealing washer missing |7.2.2c| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Brake locking device insecure |3.2.A1e| | 1 |
| Front Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front Rear reflector on motorcycle does not reflect squarely to the rear |1.4.1| | 1 |
| Nearside Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Offside Front Brake lever insecure |3.1.2a| | 1 |
| Centre Front Upper Brake master cylinder has a seized master cylinder pivot. |3.2.B5| | 1 |
| Nearside Rear Upper Brake cable knotted |3.2.A1b| | 1 |
| Centre Front Upper Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Nearside Rear Lower Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Centre Front Lower Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Offside Rear Lower Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Centre Front Upper Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Rear Brake lever excessively corroded |3.2.A1c| | 1 |
| Rear Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Nearside Front Front suspension assembly component excessively corroded. |2.3.1| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Front Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Brake lever mounting cracked |3.1.2c| | 1 |
| Front Front position lamp missing |1.1.1a| | 1 |
| Nearside Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Offside Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Offside Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Fuel cap does not fasten securely by a positive means |7.2.2b| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Brake lever mounting insecure |3.1.2a| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front Brake cylinder severely damaged |3.2.B1b| | 1 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Offside Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Centre Front Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Horn control not readily accesible. |1.7.2a| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Nearside Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Rear Fuel cap sealing washer missing |7.2.2c| | 1 |
| Rear Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Front Front suspension fouling which affects the movement of the front suspension. |2.3.6a| | 1 |
| Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Brake lever insecure |3.1.2a| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Brake lever mounting insecure |3.1.2a| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| All position lamps do 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 Brake lever cracked |3.1.2c| | 1 |
| Headlamp incorrect colour |1.2.1| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Nearside Steering lock stop maladjusted |2.1.3| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Nearside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Rear Brake lever attachment screws loose |3.1.2b| | 1 |
| Offside Handlebar mounting clamp loose |2.1.1a| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Front Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Brake linkage excessively corroded |3.2.A1c| | 1 |
| Rear position lamp flickers when tapped lightly by hand |1.1.3c| | 1 |
| Nearside Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 1 |
| Horn missing |1.7.1| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Rear Brake drum|s| insecure |3.2.A1g| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Centre Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Centre Front Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Front Brake disc|s| insecure |3.2.A1g| | 1 |
| Rear suspension bush has excessive free play Engine mounting |2.4.A2a|i|| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Stop lamp does not illuminate immediately a brake applies when rear brake applied |1.3.1a| | 1 |
| Offside Front Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Offside Indicator tell tale not functioning |1.5.2| | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Nearside Front All direction indicators light intensity significantly reduced (4.4.3 (a)) | 1 |
| Rear All direction indicators light intensity significantly reduced (4.4.3 (a)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |