| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 61 |
| Drive chain excessively loose |6.2.1d| | 25 |
| Registration plate issues | 23 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 22 |
| Rear reflector on motorcycle missing |1.4.1| | 22 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 21 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 18 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 11 |
| Rear reflector on motorcycle obscured |1.4.1| | 11 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Front Brake excessively binding (1.2.1 (f)) | 10 |
| Rear reflector missing (4.8.2 (a) (ii)) | 10 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 9 |
| Drive chain worn to excess |6.2.1e| | 7 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 7 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 6 |
| Registration plate lamp issues | 6 |
| Horn not working |1.7.3a| | 5 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 5 |
| Rear Position lamp not working (4.2.1 (a)) | 5 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 5 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 4 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 4 |
| Front Brake excessively binding |1.2.1 |f|| | 4 |
| 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| | 4 |
| Riders seat insecure |6.2.1a| | 4 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 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 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Handlebar deformed |2.1.1b| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Stop lamp remains on when the brakes are released | 3 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 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 not working on main beam (4.1.1 (a) (ii)) | 3 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 3 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Rear reflector on motorcycle obscured |1.4.2b| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Fuel system component leaking |7.2.1a| | 2 |
| Front Position lamp not working |4.2.1 |a|| | 2 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 2 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 2 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Rear Position lamp not working |4.2.1 |a|| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Brake disc significantly and obviously worn |1.1.14 |a| |i|| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Rear Brake excessively binding |1.2.1 |f|| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Hazard warning switch missing |1.4.B.1d| | 2 |
| Stop lamp does not illuminate immediately a brake applies front brake |1.3.1a| | 2 |
| Riders seat insecure (6.2.5 (a) (ii)) | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Fuel cap ineffective (6.1.3 (b) (i)) | 2 |
| Front Brake disc fractured (1.1.14 (a) (ii)) | 2 |
| Rear Brake excessively binding (1.2.1 (f)) | 2 |
| Central Rear Position lamp not working (4.2.1 (a)) | 2 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 2 |
| Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Indicator switch inoperative (4.4.2 (a) (ii)) | 2 |
| Horn not working (7.7 (a)) | 2 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |