| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 9 |
| Rear reflector on motorcycle missing |1.4.1| | 7 |
| Registration plate issues | 5 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Horn not working |1.7.3a| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Front position lamp flickers when tapped lightly by hand |1.1.3c| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Wheel fixing loose (multiple fixings) (5.2.1 (a) (i)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Nearside Rear Lower Drive chain excessively loose |6.2.1d| | 1 |
| Nearside Rear Outer Drive chain excessively tight |6.2.1d| | 1 |
| Stop lamp not working Front control |4.3.1 |a| |ii|| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Offside Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Nearside Front Direction indicator missing (4.4.1 (a) (ii)) | 1 |
| Offside Front Direction indicator missing (4.4.1 (a) (ii)) | 1 |
| Offside Front Direction indicator not working earth stap off |4.4.1 |a| |ii|| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| 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| | 1 |
| Nearside Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Nearside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Horn not working (7.7 (a)) | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Drive chain excessively loose |6.2.1d| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Rear Brake caliper insecurely mounted and braking performance affected |1.1.16 |c| |ii|| | 1 |
| Rear mono-shock insecure |2.4.B.4| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Rear Rear position lamp obscured more than 50% |1.1.1d| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Brake master cylinder leaking |1.1.10 |b| |ii|| | 1 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 1 |
| Fuel pipe leaking excessively or a risk of fire (6.1.3 (b) (ii)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |