| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 57 |
| Drive chain excessively loose |6.2.1d| | 39 |
| Rear reflector on motorcycle missing |1.4.1| | 23 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 23 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 21 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 20 |
| Drive chain worn to excess |6.2.1e| | 18 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 14 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 14 |
| Horn not working |1.7.3a| | 13 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Drive chain excessively tight |6.2.1d| | 11 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 11 |
| Registration plate issues | 10 |
| Registration plate lamp issues | 10 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 9 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 8 |
| Rear Brake disc|s| cracked |3.2.A1g| | 7 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 7 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 7 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 7 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 7 |
| Nearside Rear Footrest missing |6.2.1a| | 7 |
| Nearside Front Direction indicator not working |1.5.1c| | 6 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 6 |
| Front suspension has inadequate damping effect. |2.3.6c| | 6 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Offside Rear Footrest missing |6.2.1a| | 6 |
| Stop lamp remains on when the brake is released |1.3.1e| | 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 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 5 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 5 |
| Nearside Front Direction indicators not working |1.5.1c| | 5 |
| Offside Front Direction indicators not working |1.5.1c| | 5 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 5 |
| Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 4 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 4 |
| Rear Footrest missing |6.2.1a| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Headlamp switch faulty |1.2.4| | 4 |
| Rear Brake excessively binding (1.2.1 (f)) | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Rear Drive chain excessively loose |6.2.1d| | 3 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 3 |
| Stop lamp remains on when the brakes are released | 3 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Nearside Handlebar deformed |2.1.1b| | 3 |
| Nearside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 3 |
| Offside Front Direction indicator not working |1.5.1c| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 3 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 3 |
| Front Brake excessively binding (1.2.1 (f)) | 3 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 2 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Nearside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Direction indicator not working |1.5.1c| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 2 |
| Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 2 |
| Fairing so located that it is likely to impede the steering |2.1.2e| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Front Plate brake test indicates a binding brake |3.3.B1a| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Brake disc|s| securing bolt|s| missing |3.2.A1g| | 2 |
| Handlebar mounting insecure (2.2.1 (a) (i)) | 2 |
| Horn not working (7.7 (a)) | 2 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Offside Front Steering operation fouling on the fuel tank or bodywork on full lock |2.1.4 |b|| | 2 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 2 |
| Headlamp aim not tested (4.1.2 (b)) | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Front Gradient brake test indicates a sticking brake |3.3.D1c| | 2 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 2 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Front Position lamp not working (4.2.1 (a)) | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Offside Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Brake hose damaged | 2 |
| Chain guard insecure |6.2.1c| | 2 |
| Nearside Front Direction indicator insecure |1.5.3b| | 2 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Rear brake disc in such a condition that it is seriously weakened | 2 |
| 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)) | 2 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Headlamp light intensity severely reduced (4.1.4 (a)) | 2 |
| Offside Front Direction indicator insecure |1.5.3b| | 2 |
| Offside Front Footrest insecure |6.2.1a| | 2 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 2 |
| Rear Brake pedal is inoperative |3.1.3c| | 2 |
| Rear Rear suspension movement is excessively stiff |2.4.A.3b| | 2 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Rear Position lamp not working |4.2.1 |a|| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Offside Rear Footrest missing (6.2.12 (a)) | 2 |
| Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 2 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |