| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 14 |
| Headlamp aim out of alignment | 13 |
| Drive chain excessively loose |6.2.1d| | 10 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 9 |
| Registration plate issues | 9 |
| Steering headbearing has excessive free play |2.2.2| | 8 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Nearside Rear Direction indicator not working |1.5.1c| | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Horn not working |1.7.3a| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 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 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Headlamp switch faulty |1.2.4| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear reflector on motorcycle obscured |1.4.1| | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Rear Brake hose fouling |3.2.B3b| | 2 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 2 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Riders seat insecure (6.2.5 (a) (ii)) | 2 |
| Rear Brake pedal is positioned so that the brake cannot be readily applied (1.1.2 (d)) | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Rear Brake disc|s| insecure |3.2.A1g| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Nearside Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Front Exhaust mounting missing |7.1.1c| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on not working |1.1.3a| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride split pin clip facing wrong direction |6.2.1h| | 1 |
| Rear Brake pedal is inoperative |3.1.3c| | 1 |
| Fuel tank leaking |7.2.1a| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Front Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Brake lever pivots excessively worn |3.1.3a| | 1 |
| Front Brake lever attachment screws loose |3.1.2b| | 1 |
| Centre Steering lock stop missing |2.1.3| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Nearside Rear Direction indicator missing |1.5.1a| | 1 |
| Front Steering lock stop ineffective |2.1.3| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is 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 |
| Nearside Clutch lever bent so it cannot be readily operated. |6.2.1g| | 1 |
| Front Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Rear Chain guard insecure |6.2.1c| | 1 |
| Front Position lamp switch faulty |1.1.4a| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Stop lamp missing |1.3.3a| | 1 |
| Headlamp switch insecure |1.2.4| | 1 |
| Steering lock stop missing |2.1.3| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride clutch lever pivot bolt locknut |6.2.1h| | 1 |
| Front shock absorber seal failed and leaking oil both |2.3.3| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 1 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear Hydraulic brake control creeps under load. |3.1.4a| | 1 |
| Front Brake lever is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Exhaust mounting missing |7.1.1c| | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Nearside Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Horn sound not in accordance with requirements not loud enough to be heard by other road users (7.7 (c)) | 1 |
| Front Shock absorber has negligible damping effect too stiff-too much oil? (5.3.2 (b)) | 1 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Offside Rear Suspension arm pin or bush likely to become detached swingarm pivot bush totally degraded (5.3.4 (a) (ii)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Headlamp aim not tested not dipping corectly (4.1.2 (b)) | 1 |
| Handlebar excessively deformed incorrectly fitted (2.2.1 (c) (i)) | 1 |
| Front brake disc in such a condition that it is seriously weakened | 1 |
| Fuel tank leaking excessively or a risk of fire (6.1.3 (b) (ii)) | 1 |
| Rear Wheel more than one fixing missing wheel adjuster locknuts missing (5.2.1 (a) (ii)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Nearside Steering operation fouling on the fuel tank or bodywork on full lock lockstop missing (2.1.4 (b)) | 1 |
| Offside Steering operation fouling on the fuel tank or bodywork on full lock lockstop missing (2.1.4 (b)) | 1 |
| Front Brake component inadequately mounted brake pipe insecure-too long (1.1.21 (c)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Brake disc contaminated oil (1.1.14 (b)) | 1 |
| Rear reflector defective or damaged by more than 50% of the reflecting surface (4.8.1 (a) (ii)) | 1 |
| Rear Wheel spindle or securing nut(s) so insecure that wheel security or steering control is adversely affected (5.2.1 (c) (ii)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Headlamp dipped 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 |
| Offside Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Front wheel spindle loose |2.3.3a| | 1 |
| Rear suspension component loose |2.4.A.1a| | 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 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Nearside Handlebar handgrip missing |2.1.1c| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Brake master cylinder has an excessively worn master cylinder pivot. |3.2.B5| | 1 |
| Stop lamp does not illuminate immediately a brake applies from rear brake pedal |1.3.1a| | 1 |
| Horn missing |1.7.1| | 1 |
| Offside Direction indicator affected by the operation of another lamp both front flash when operated |1.5.1c| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Offside Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Nearside Rear Brake component has an inadequate repair |3.1.5| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Front Steering lock stop missing |2.1.3| | 1 |
| Front mudguard can easily contact any fixed point of the motor bicycle. |2.3.7| | 1 |
| Front Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Rear Front mudguard insecure |2.3.7| | 1 |