| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 63 |
| Rear reflector on motorcycle missing |1.4.1| | 11 |
| Registration plate issues | 11 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| 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| | 7 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 7 |
| Drive chain worn to excess |6.2.1e| | 6 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Horn not working |1.7.3a| | 6 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Drive chain excessively loose |6.2.1d| | 5 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 5 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 4 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Rear Drive chain excessively loose |6.2.1d| | 2 |
| Front Position lamp not working |4.2.1 |a|| | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Offside Front suspension assembly component cracked |2.3.1| | 1 |
| Rear Brake cylinder insecurely mounted |3.2.B1a| | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Front Riders seat insecure |6.2.1a| | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Direction indicator not working Both the Nearside indicators not working |4.4.1 |a| |ii|| | 1 |
| Nearside Drive chain excessively loose |6.2.1d| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Nearside Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Central Rear Position lamp not working |4.2.1 |a|| | 1 |
| Centre Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear wheel bearings have excessive free play all |2.4.A.2c| | 1 |
| Headlamp switch insecure both switch gears loose |1.2.4| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.4 |a|| | 1 |
| Headlamp insecure |4.1.1 |c|| | 1 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Front suspension assembly component missing Bolt missing for fork brace |2.3.1| | 1 |
| Handlebar mounting excessively deteriorated |flexible type| |2.1.1d| | 1 |
| Outer Front Rear reflector on motorcycle missing |1.4.1| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Nearside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Brake linkage has abnormal movement due to excessive wear |3.2.A1i| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition |8.1.1 |a|| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Rear wheel spindle loose |2.4.A.2b| | 1 |
| Front Brake lever attachment screws loose |3.1.2b| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Nearside Outer Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Nearside Inner Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Stop lamp not working front and rear (4.3.1 (a) (ii)) | 1 |
| Registration plate lamp issues | 1 |
| Offside Forks fractured (2.2.2 (d) (i)) | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Front Shock absorber has a serious fluid leak bothsides (5.3.2 (b)) | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Front Direction indicator incorrect colour Both (4.4.3 (a)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Front Direction indicator adversely affected by the operation of another lamp (4.4.3 (b)) | 1 |
| Offside Front Wheel spindle or securing nut(s) so insecure that wheel security or steering control is adversely affected (5.2.1 (c) (ii)) | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Rear All direction indicators obviously incorrectly positioned both to close (4.4.3 (a)) | 1 |
| Front Motorcycle structure joining/attachment plate or fastening insecure fairing (6.1.1 (b) (i)) | 1 |
| Throttle operating incorrectly not returning (6.2.7 (a) (i)) | 1 |
| Nearside Exhaust system insecure (6.1.2 (a)) | 1 |
| Engine mounting/bracket missing front bolt missing (6.1.8 (a) (ii)) | 1 |
| Rear Wheel spindle loose (5.2.1 (c) (i)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Drive chain sprocket excessively loose carrier/cush drive (6.1.7 (c) (i)) | 1 |
| Rear All position lamps not working (4.2.1 (a)) | 1 |
| Offside Front Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 1 |
| Rear reflector missing Reflector fitted (4.8.2 (a) (ii)) | 1 |
| Handlebar deformed to the extent that steering is affected (2.2.1 (c) (ii)) | 1 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Rear Stop lamp does not illuminate by the operation of both brake controls Front brake switch connectors corroded (4.3.2 (a) (iii)) | 1 |