| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 85 |
| Drive chain excessively loose |6.2.1d| | 44 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 34 |
| Registration plate issues | 31 |
| Rear reflector on motorcycle missing |1.4.1| | 29 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 15 |
| Drive chain excessively tight |6.2.1d| | 15 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 13 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 13 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Rear Wheel spoke excessively loose |4.2.1b| | 11 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 10 |
| Throttle operating incorrectly |6.2.1f| | 10 |
| Front Brake excessively binding (1.2.1 (f)) | 10 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 9 |
| Drive chain worn to excess |6.2.1e| | 8 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 8 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 8 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 7 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 7 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 6 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 6 |
| Handlebar mounting excessively deteriorated |flexible type| |2.1.1d| | 6 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 6 |
| Horn not working |1.7.3a| | 5 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 5 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 5 |
| Rear reflector missing |4.8.2 |a| |ii|| | 5 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 5 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 5 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 5 |
| Rear reflector missing (4.8.2 (a) (ii)) | 5 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 4 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 4 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| 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|| | 4 |
| Front Wheel spoke excessively loose |4.2.1b| | 4 |
| Headlamp insecure |1.2.3b| | 4 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 3 |
| Front Brake excessively binding |1.2.1 |f|| | 3 |
| Stop lamp remains on when the brakes are released | 3 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Handlebar deformed |2.1.1b| | 3 |
| Nearside Drive chain worn to excess |6.2.1e| | 3 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 3 |
| Nearside Rear Footrest missing |6.2.1a| | 3 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 3 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Headlamp switch faulty |1.2.4| | 3 |
| Rear Brake excessively binding (1.2.1 (f)) | 3 |
| Brake pedal cannot be applied smoothly |3.1.3d| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Offside Front Footrest insecure |6.2.1a| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 2 |
| Rear Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 2 |
| 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| | 2 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Front Front position lamp insecure |1.1.1c| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Rear Wheel spoke missing |4.2.1b| | 2 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Nearside Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 2 |
| Nearside Footrest insecure |6.2.1a| | 2 |
| Nearside Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Rear Drive chain excessively loose |6.2.1d| | 2 |
| Nearside Drive chain excessively loose |6.2.1d| | 2 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 2 |
| Rear Wheel spoke excessively loose (5.2.2 (d)) | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 2 |