| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 223 |
| Rear reflector on motorcycle missing |1.4.1| | 92 |
| Registration plate issues | 83 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 24 |
| Drive chain excessively loose |6.2.1d| | 22 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 22 |
| Rear reflector missing (4.8.2 (a) (ii)) | 20 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 19 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 16 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 15 |
| Headlamp aim beam image kick up to the offside |1.6| | 14 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 14 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 14 |
| Drive chain excessively tight |6.2.1d| | 13 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Front wheel bearings have excessive free play |2.3.5b| | 12 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 11 |
| Drive chain worn to excess |6.2.1e| | 10 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 10 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 10 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 10 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 8 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 8 |
| Horn not working (7.7 (a)) | 8 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 7 |
| Throttle operating incorrectly |6.2.1f| | 7 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 7 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 7 |
| Registration plate lamp issues | 7 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Horn not working |1.7.3a| | 6 |
| Stop lamp not working (4.3.1 (a) (ii)) | 6 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 6 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 6 |
| Offside Front Footrest insecure |6.2.1a| | 6 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 6 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 6 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 5 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 5 |
| Nearside Rear Footrest missing |6.2.1a| | 5 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Nearside Front Direction indicator not working |1.5.1c| | 5 |
| 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| | 5 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 4 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Offside Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Nearside Front Footrest insecure |6.2.1a| | 4 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 4 |
| Offside Rear Direction indicator not working |1.5.1c| | 4 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 4 |
| Rear reflector missing |4.8.2 |a| |ii|| | 4 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Front Position lamp not working (4.2.1 (a)) | 4 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 4 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 3 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Nearside Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 3 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 3 |
| Front Direction indicator incorrect colour |1.5.1b| | 3 |
| Front Headlamp incorrect colour |1.2.1| | 3 |
| Front position lamp incorrect colour |1.1.2a| | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 3 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Offside Front Brake disc contaminated (1.1.14 (b)) | 3 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 3 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 3 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Fuel system component insecure |7.2.1b| | 3 |
| Front Brake excessively binding (1.2.1 (f)) | 3 |
| Offside Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 3 |
| Offside Front Direction indicator not working |1.5.1c| | 3 |
| Horn sound not in accordance with requirements (7.7 (c)) | 3 |
| Indicator switch insecure |1.5.4| | 3 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Nearside Rear Direction indicators not working |1.5.1c| | 3 |