| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 15 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 13 |
| Registration plate issues | 11 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Drive chain worn to excess |6.2.1e| | 8 |
| Drive chain excessively loose |6.2.1d| | 7 |
| Headlamp aim out of alignment | 7 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 7 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 7 |
| Headlamp insecure |1.2.3b| | 6 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 6 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 6 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| Direction indicators not working |1.5.1c| | 5 |
| Handlebar deformed |2.1.1b| | 5 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 4 |
| Headlamp aim not tested |1.6| | 4 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 4 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Horn not working |1.7.3a| | 4 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Rear Footrest missing |6.2.1a| | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Wheel spoke excessively loose |4.2.1b| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 3 |
| Brake pedal pivots excessively worn |3.1.3a| | 3 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Rear Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 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 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Front Hydraulic brake control creeps under load. |3.1.4a| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Centre Rear Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 2 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Nearside Steering lock stop missing |2.1.3| | 1 |
| Offside Steering lock stop missing |2.1.3| | 1 |
| Front Steering lock stop missing |2.1.3| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Offside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Wheel spoke cracked. |4.2.1b| | 1 |
| Wheel spoke excessively loose |4.2.1b| | 1 |
| Handlebar handgrip missing |2.1.1c| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Fuel tank leaking |7.2.1a| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| An item not tested |Manual| | 1 |
| Headlamp incorrect colour |1.2.1| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Rear Brake pedal attachment screws loose |3.1.2b| | 1 |
| Front Brake pipe inadequately supported |3.2.B2b| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Rear Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Horn missing |1.7.1| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Lower Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Front Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Rear position lamp missing |1.1.1a| | 1 |
| Front Brake component damaged and seriously reduced in strength |3.2.A1| | 1 |
| Rear Chain guard fouling another component |6.2.1c| | 1 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Front Brake lever is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Front Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 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 |
| Centre Headlamp insecure |1.2.3b| | 1 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Wheel spoke cracked. |4.2.1b| | 1 |
| Offside Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Front Direction indicator missing |1.5.1a| | 1 |
| Rear Direction indicator missing |1.5.1a| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear Brake caliper|s| insecure |3.2.A1j| | 1 |
| Rear Brake component has an inadequate repair |3.1.5| | 1 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies front brake switch |1.3.1a| | 1 |
| Fairing insecure and likely to impede the steering radiator guard |2.1.2e| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Front Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Headlamp dipped beam flickers when tapped lightly by hand |1.2.2c| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Brake pedal attachment screws loose |3.1.2b| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Front All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Front Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Front Front position lamp insecure |1.1.1c| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Indicator switch does not operate the direction indicators on the side selected |1.5.4| | 1 |
| Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Front Upper Handlebar deformed |2.1.1b| | 1 |
| Front Upper Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Centre Front Upper Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Centre Front Upper Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Centre Front Upper Horn is not a constant note |1.7.3c| | 1 |
| Centre Rear Lower Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Centre Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Centre Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Front Brake lever attachment screws missing |3.1.2b| | 1 |
| Centre Front Upper All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Inner Rear Upper All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Offside Front Upper Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Inner Front Upper Steering lock stop ineffective |2.1.3| | 1 |
| Centre Rear Lower Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Nearside Front Lower Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Centre Rear Upper Rear reflector on motorcycle missing |1.4.1| | 1 |
| Nearside Front Upper Position lamp switch faulty |1.1.4a| | 1 |
| Direction indicator insecure |1.5.3b| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Offside Front Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Brake performance not tested |3.3| | 1 |
| Rear Headlamp aim not tested |1.6| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Rear Built up wheel has a loose bolt/s |4.2.1c| | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Position lamp not working (4.2.1 (a)) | 1 |
| Registration plate lamp issues | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Nearside Rear Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 1 |
| Offside Rear Footrest missing (6.2.12 (a)) | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Front Brake hose leaking (1.1.12 (c)) | 1 |
| Rear Suspension arm ball joint likely to become detached (5.3.4 (a) (ii)) | 1 |
| Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 1 |