| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 20 |
| Rear reflector on motorcycle missing |1.4.1| | 11 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 7 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 7 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 6 |
| Registration plate issues | 5 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 4 |
| Rear Wheel spoke excessively loose |4.2.1b| | 4 |
| Horn not working |1.7.3a| | 4 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Drive chain excessively loose |6.2.1d| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 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 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Rear Direction indicator not working |1.5.1c| | 2 |
| Fuel tank leaking |7.2.1a| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 2 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 2 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 2 |
| Horn is not a constant note |1.7.3c| | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Brake lever attachment screws loose |3.1.2b| | 1 |
| Rear Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Rear position lamp adversely affected by the operation of the horn |1.1.3b| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Brake lever is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Front Floor brake test indicates a severely grabbing brake |3.3.C2d| | 1 |
| Rear Brake pedal is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| An item not tested |Manual| | 1 |
| Rear Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Rear Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear Wheel inadequatly repaired significantly reducing the original strength |4.2.1a| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Rear Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Wheel spindle or securing nut|s| so insecure that wheel security or steering control is adversely affected |5.2.1 |c| |ii|| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Nearside Footrest missing |6.2.1a| | 1 |
| Offside Footrest missing |6.2.1a| | 1 |
| Nearside Throttle operating incorrectly lock sticking |6.2.1f| | 1 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Headlamp aim beam image too far to the left |1.6.4| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Stop lamp not working both |4.3.1 |a| |ii|| | 1 |
| All direction indicators adversely affected by the operation of another lamp |4.4.3 |b|| | 1 |
| Front Brake caliper insecure |1.1.16 |c| |i|| | 1 |
| Brake component modification adversely affecting braking performance front brake disc incorrect size |1.1.21 |d| |ii|| | 1 |
| Front Wheel spoke excessively loose |5.2.2 |d|| | 1 |
| Rear Suspension component pin or bush excessively worn linkage |5.3.4 |a| |i|| | 1 |
| Rear Suspension component pin or bush likely to become detached linkage bolt |5.3.4 |a| |ii|| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Front Wheel spindle loose |5.2.1 |c| |i|| | 1 |
| Fuel cap mounting flange/sealing method defective unable to open |7.2.2c| | 1 |
| Front Brake lever attachment screws missing lock nut |3.1.2b| | 1 |
| Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Exhaust mounting missing |7.1.1c| | 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 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Front Direction indicator missing |1.5.1a| | 1 |
| Offside Front Direction indicator missing |1.5.1a| | 1 |
| Nearside Rear Direction indicator missing |1.5.1a| | 1 |
| Offside Rear Direction indicator missing |1.5.1a| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 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 |
| Headlamp insecure |1.2.3b| | 1 |
| Nearside Rear Footrest missing |6.2.12 |a|| | 1 |
| Offside Rear Footrest missing |6.2.12 |a|| | 1 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Rear An item not tested |Manual| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Direction indicators not working off side rear winker |1.5.1c| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Rear Indicator tell tale not functioning |1.5.2| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Chain guard missing |6.2.1c| | 1 |
| Brake lever is inoperative |3.1.3c| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Throttle operating incorrectly |6.2.1f| | 1 |
| Offside Front Brake lever has restricted free movement Brake lever fowling support. |1.1.15 |e|| | 1 |
| Offside Rear Inner Brake linkage has restricted free movement Rear brake lever linkage fowling chassis. |1.1.15 |e|| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Front Brake hose leaking fluid |3.2.B4| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Front Exhaust is leaking and excessively noisey (7.1.1b) | 1 |
| Registration plate lamp issues | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Stop lamp not working [when operated on front brake] (4.3.1 (a) (ii)) | 1 |
| Rear Wheel corroded significantly reducing the original strength (4.2.1a) | 1 |
| Nearside Front shock absorber seal failed and leaking oil (2.3.3) | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. (3.3.C1b) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Rear Lower Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Front Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 1 |
| Central Rear Lower Suspension component pin or bush excessively worn (5.3.4 (a) (i)) | 1 |