| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 38 |
| Rear reflector on motorcycle missing |1.4.1| | 27 |
| Registration plate issues | 17 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Registration plate lamp issues | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 2 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Centre Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Front Valve stem seriously damaged |5.2.3 |j|| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 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 Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Offside Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Brake master cylinder insecure (1.1.10 (c)) | 1 |
| Offside Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride chain adjuster |6.2.1h| | 1 |
| Headlamp aim not tested incorrect beam pattern |1.6| | 1 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Drive chain fouling another component front chain guide |6.2.1d| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Stop lamp does not emit a steady light (1.3.1b) | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Drive chain excessively loose |6.2.1d| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Rear Brake disc fractured (1.1.14 (a) (ii)) | 1 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Nearside Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Horn not working |1.7.3a| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies front brake switch not working |1.3.1a| | 1 |
| Offside Rear Footrest insecure (6.2.12 (a)) | 1 |
| Exhaust system insecure (6.1.2 (a)) | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Offside Footrest missing |6.2.1a| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Stop lamp does not illuminate immediately a brake applies front brake lever operation |1.3.1a| | 1 |
| Front Headlamp incorrect colour (4.1.4 (a)) | 1 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front Headlamp incorrect colour |1.2.1| | 1 |
| All direction indicators missing |4.4.1 |a| |ii|| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Central Rear Rear reflector on motorcycle missing reflector missing |1.4.1| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Front Stop lamp does not illuminate immediately a brake applies Replaces switch |1.3.1a| | 1 |
| Offside Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Rear Drive chain sprocket so loose it is likely to fail bolt missing and one loose fixing (6.1.7 (c) (ii)) | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |