| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 11 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 10 |
| Registration plate issues | 7 |
| Drive chain excessively loose |6.2.1d| | 6 |
| Drive chain worn to excess |6.2.1e| | 5 |
| Rear reflector missing (4.8.2 (a) (ii)) | 5 |
| Drive chain excessively tight |6.2.1d| | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Stop lamp remains on when the brakes are released | 4 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Front Wheel spoke excessively loose (5.2.2 (d)) | 3 |
| Rear Footrest missing (6.2.12 (a)) | 2 |
| Drive chain sprocket so worn it is likely to fail |6.1.7 |c| |ii|| | 2 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 2 |
| Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 1 |
| Dipswitch does not operate immediately when selected on main beam (4.1.3 (b)) | 1 |
| Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Nearside Front Clutch lever bent so it cannot be readily operated clutch lever bolt needed tightening (6.2.7 (b)) | 1 |
| Nearside Rear Direction indicator likely to become detached |4.4.1 |c| |ii|| | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (Fork Seal) (5.3.2 (b)) | 1 |
| Offside Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Decelerometer brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 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 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Nearside Front Front suspension assembly component excessively bent |2.3.1| | 1 |
| Rear Plate brake test indicates a sticking brake |3.3.B1a| | 1 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Handlebar excessively deformed (2.2.1 (c) (i)) | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Front Horn sound not in accordance with requirements |7.7 |c|| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Throttle operating incorrectly |6.2.7 |a| |i|| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Stop lamp remains on when the brake is released Rear |1.3.1e| | 1 |
| Drive chain worn to excess and sprockets |6.2.1e| | 1 |
| Horn not working (7.7 (a)) | 1 |
| Nearside Rear Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Drive chain sprocket worn to excess Rear |6.1.7 |c| |i|| | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Offside Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 1 |
| Rear Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Front Brake component has restricted free movement and operation is likely to be impeded brake binding |3.2.A1h| | 1 |
| Rear Brake drum in such a condition that it is seriously weakened (1.1.14 (a) (ii)) | 1 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Riders seat insecure bolts missing/loose (6.2.5 (a) (ii)) | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Rear reflector on motorcycle obscured |1.4.2b| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Stop lamp not working of foot brake (4.3.1 (a) (ii)) | 1 |
| Rear Lower Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Rear reflector missing obscured by L plate (4.8.2 (a) (ii)) | 1 |
| Rear Wheel spoke excessively loose multiple spokes on nearside of wheel (5.2.2 (d)) | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Riders seat insecure |6.2.5 |a| |ii|| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Drive chain excessively tight |6.1.7 |k| |i|| | 1 |
| Horn not working |1.7.3a| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Front Brake disc(s) has excessive run out (3.2.A1m) | 1 |
| Drive chain excessively tight (6.2.1d) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Drive chain excessively loose (6.2.1d) | 1 |
| Drive chain worn to excess (6.2.1e) | 1 |
| Rear Drive chain sprocket worn to excess (6.2.1e) | 1 |
| Brake lever is so short and the brake cannot be readily applied (3.1.3c) | 1 |
| Offside Front Footrest missing (6.2.12 (a)) | 1 |