| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 71 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 27 |
| Stop lamp remains on when the brakes are released | 26 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 21 |
| Rear reflector missing (4.8.2 (a) (ii)) | 21 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 20 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 18 |
| Front Brake excessively binding (1.2.1 (f)) | 15 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 15 |
| Registration plate issues | 13 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 13 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 10 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 10 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 10 |
| Front Brake excessively binding |1.2.1 |f|| | 9 |
| Front Position lamp not working (4.2.1 (a)) | 9 |
| Registration plate lamp issues | 8 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 8 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 8 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 7 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 7 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 7 |
| Rear Brake excessively binding (1.2.1 (f)) | 6 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 6 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 5 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Headlamp aim not tested (4.1.2 (b)) | 5 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 5 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 5 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 5 |
| Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 4 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 4 |
| Rear Position lamp not working |4.2.1 |a|| | 4 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 4 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 4 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 4 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 4 |
| Horn not working (7.7 (a) (ii)) | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Front Position lamp not working |4.2.1 |a|| | 4 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 4 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 4 |
| Rear Brake grabbing severely (1.2.1 (c)) | 4 |
| Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Nearside Rear Direction indicator likely to become detached (4.4.1 (c) (ii)) | 4 |
| Nearside Rear Direction indicator likely to become detached |4.4.1 |c| |ii|| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 3 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Nearside Rear Drive chain excessively loose (6.1.7 (c) (i)) | 3 |
| Headlamp aim unable to be tested (4.1.2 (b)) | 3 |
| Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 3 |
| Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 3 |
| All direction indicators not working (4.4.1 (a) (ii)) | 3 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Rear Drive chain sprocket excessively loose |6.1.7 |c| |i|| | 3 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 3 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Front Headlamp insecure (4.1.1 (c)) | 3 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 3 |
| Horn not working (7.7 (a)) | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Front Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 3 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Nearside Front Direction indicator not working |4.4.1 |a| |ii|| | 3 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 3 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 2 |
| Rear Brake pedal not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 2 |
| Central Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 2 |
| Pillion seat insecure |6.2.6 |a| |ii|| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Front Wheel spindle loose |5.2.1 |c| |i|| | 2 |
| Front Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 2 |
| Front Position lamp missing (4.2.1 (a)) | 2 |
| Drive chain excessively tight, so that it is likely to fail |6.1.7 |k| |ii|| | 2 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |
| Rear Drive chain sprocket so loose it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 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 Brake cable insecure | 2 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 2 |
| Nearside Rear Drive chain excessively loose |6.1.7 |c| |i|| | 2 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| Nearside Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 2 |
| Forks excessively deformed (2.2.2 (d) (i)) | 2 |
| Rear Brake pedal has insufficient reserve travel |1.1.2 |a|| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Front Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 2 |
| Headlamp insecure (4.1.1 (c)) | 2 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Riders seat insecure |6.2.5 |a| |ii|| | 2 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Front Brake grabbing severely (1.2.1 (c)) | 2 |
| Offside Rear Wheel spindle or securing nut(s) so insecure that wheel security or steering control is adversely affected (5.2.1 (c) (ii)) | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 2 |
| Drive chain excessively loose |6.2.1d| | 2 |
| Front Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 2 |