| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 121 |
| Headlamp aim out of alignment | 121 |
| Headlamp aim beam image kick up to the offside |1.6| | 60 |
| Registration plate issues | 59 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 49 |
| Drive chain excessively loose |6.2.1d| | 47 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 41 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 32 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 30 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 30 |
| Drive chain worn to excess |6.2.1e| | 22 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 21 |
| Rear Brake disc|s| cracked |3.2.A1g| | 17 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 17 |
| Drive chain excessively tight |6.2.1d| | 17 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 16 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 15 |
| 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| | 14 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 13 |
| Rear reflector missing (4.8.2 (a) (ii)) | 13 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 11 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 11 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 11 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 11 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 10 |
| Front Brake excessively binding (1.2.1 (f)) | 10 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 9 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 9 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 9 |
| Throttle operating incorrectly |6.2.1f| | 8 |
| Nearside Rear Direction indicator not working |1.5.1c| | 8 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 8 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 8 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 8 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 7 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 7 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Horn not working |1.7.3a| | 6 |
| Offside Rear Direction indicator not working |1.5.1c| | 6 |
| Nearside Rear Direction indicators not working |1.5.1c| | 6 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 6 |
| Nearside Handlebar deformed |2.1.1b| | 6 |
| Rear Drive chain excessively loose |6.2.1d| | 6 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 5 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 5 |
| Nearside Front Direction indicator not working |1.5.1c| | 5 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 5 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 5 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 5 |
| Nearside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 5 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 5 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 5 |
| Registration plate lamp issues | 5 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 4 |
| Exhaust excessively deteriorated |7.1.1a| | 4 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 4 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| An item not tested |Manual| | 4 |
| Offside Rear Direction indicators not working |1.5.1c| | 4 |
| Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Nearside Front Direction indicators not working |1.5.1c| | 4 |
| Offside Front Direction indicator not working |1.5.1c| | 4 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 4 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 4 |
| 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| | 3 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 3 |
| Nearside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 3 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 3 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Headlamp incorrect colour |1.2.1| | 3 |
| Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Front Steering headbearing has excessive free play |2.2.2| | 3 |
| Nearside Steering lock stop ineffective |2.1.3| | 3 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 3 |
| Front Brake performance not tested |3.3| | 3 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 3 |
| Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 3 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 3 |
| 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)) | 3 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 3 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Offside Front Brake disc contaminated (1.1.14 (b)) | 3 |