| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 34 |
| Rear reflector on motorcycle missing |1.4.1| | 20 |
| Registration plate issues | 19 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 9 |
| Drive chain excessively loose |6.2.1d| | 9 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 9 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 8 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 7 |
| Drive chain worn to excess |6.2.1e| | 7 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 7 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 6 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 6 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 6 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Direction indicators not working |1.5.1c| | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 3 |
| Horn not working |1.7.3a| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 3 |
| Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Rear Footrest missing |6.2.1a| | 3 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 3 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Rear Wheel spoke excessively loose |4.2.1b| | 2 |
| Chain guard insecure |6.2.1c| | 2 |
| Fuel system component insecure |7.2.1b| | 2 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Front Position lamp not working (4.2.1 (a)) | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 2 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Rear Direction indicator not working |1.5.1c| | 2 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Drive chain excessively tight |6.2.1d| | 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 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Rear mono-shock pivot seized |2.4.B.4| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Rear Brake hose excessively kinked |3.2.B3a| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Lower Rear reflector on motorcycle missing |1.4.1| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Rear wheel spindle loose |2.4.A.2b| | 1 |
| Indicator tell tale not operating correctly |1.5.2| | 1 |
| Nearside Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Nearside Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| All position lamps adversely affected by the operation of the horn |1.1.3b| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Brake hose damaged | 1 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Offside Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Fork yoke deformed |2.1.1b| | 1 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Front position lamp missing |1.1.1a| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Rear position lamp adversely affected by the operation of the horn |1.1.3b| | 1 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Front Upper Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Front Lower Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Upper Fuel system component insecure fuel tank |7.2.1b| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 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 |
| Nearside 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 |
| Offside Front Direction indicators 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 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Headlamp incorrect colour |1.2.1| | 1 |
| Rear Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Stop lamp not working front brake light switchdoes not function (4.3.1 (a) (ii)) | 1 |
| Front Wheel fixing missing (single fixing) (5.2.1 (a) (ii)) | 1 |
| Rear Wheel fixing missing (single fixing) split pin missing (5.2.1 (a) (ii)) | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Suspension component pin or bush excessively worn bottom shock linkage bushes worn (5.3.4 (a) (i)) | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Rear Wheel spoke missing |4.2.1b| | 1 |
| Rear Wheel spoke excessively bent |4.2.1b| | 1 |
| Chain guard fouling another component |6.2.1c| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Front Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Nearside Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Nearside Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Centre Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Rear Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear reflector on sidecar missing |1.4.1| | 1 |
| Centre Front Upper Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Front Lower Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Lower Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Rear reflector on motorcycle obscured |1.4.2b| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Brake pedal insecure |3.1.2a| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear reflector on motorcycle dirty and function impaired |1.4.2a| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Lower Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Wheel fractured significantly reducing the original strength |4.2.1a| | 1 |
| Front Brake fluid significantly below minimum mark (1.1.10 (d) (ii)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Front Brake excessively binding lower brake hose clamp is fitted wrong; it may be pinching the hose. (1.2.1 (f)) | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Stop lamp showing white light to the rear (4.3.3 (a) (ii)) | 1 |
| Position lamp showing white light to the rear (4.2.3 (a) (ii)) | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Fuel pipe leaking |7.2.1a| | 1 |
| Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Front Direction indicator missing |1.5.1a| | 1 |
| Rear Direction indicator missing |1.5.1a| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |