| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 52 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 26 |
| Rear reflector missing (4.8.2 (a) (ii)) | 18 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 18 |
| Rear reflector on motorcycle missing |1.4.1| | 16 |
| Registration plate issues | 16 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 13 |
| Front Brake excessively binding (1.2.1 (f)) | 12 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Rear Position lamp not working (4.2.1 (a)) | 11 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 11 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 10 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 10 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 10 |
| Steering headbearing has excessive free play |2.2.2| | 10 |
| Stop lamp remains on when the brakes are released | 10 |
| Horn not working (7.7 (a)) | 9 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 9 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 9 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 8 |
| Rear reflector missing |4.8.2 |a| |ii|| | 8 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Registration plate lamp issues | 7 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 7 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 7 |
| Horn not working |1.7.3a| | 7 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 6 |
| Rear Brake lever has insufficient reserve travel (1.1.2 (a)) | 6 |
| Stop lamp not working (4.3.1 (a) (ii)) | 6 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 6 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 6 |
| Headlamp aim not tested (4.1.2 (b)) | 5 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 5 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 5 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 5 |
| Rear Position lamp not working |4.2.1 |a|| | 5 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| All direction indicators not working (4.4.1 (a) (ii)) | 4 |
| Horn not working (7.7 (a) (ii)) | 4 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 4 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Direction indicators not working |1.5.1c| | 4 |
| Nearside Front Direction indicators not working |1.5.1c| | 4 |
| Riders seat insecure |6.2.1a| | 4 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 3 |
| Front Brake excessively binding |1.2.1 |f|| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Headlamp aim not tested |4.1.2 |b|| | 3 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 3 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 3 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Position lamp not working (4.2.1 (a)) | 3 |
| Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| All position lamps not working (4.2.1 (a)) | 2 |
| Rear Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 2 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |
| Rear Brake cable damaged (1.1.15 (a)) | 2 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Rear Wheel spindle locking device missing (5.2.1 (d)) | 2 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 2 |
| Offside Front Steering linkage locking device ineffective (2.1.3 (d)) | 2 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 2 |
| Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Indicator switch defective |1.5.4| | 2 |
| Nearside Brake lever has insufficient reserve travel (1.1.2 (a)) | 2 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 2 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 2 |
| Rear Position lamp adversely affected by the operation of another lamp |4.2.3 |b|| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Front Position lamp not working |4.2.1 |a|| | 2 |
| Headlamp light intensity severely reduced (4.1.4 (a)) | 2 |
| Offside Steering lock stop maladjusted |2.1.3| | 2 |
| Forks excessively deformed |2.2.2 |d| |i|| | 2 |
| Offside Rear Direction indicator incorrect colour (4.4.3 (a)) | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 2 |
| Front Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 2 |
| Position lamp adversely affected by the operation of another lamp (4.2.3 (b)) | 2 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 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 |
| Headlamp aim not tested |1.6| | 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 Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |