| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 71 |
| Rear reflector missing (4.8.2 (a) (ii)) | 29 |
| Registration plate issues | 23 |
| Registration plate lamp issues | 22 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 19 |
| Front Brake excessively binding (1.2.1 (f)) | 19 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 18 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 16 |
| Rear reflector missing |4.8.2 |a| |ii|| | 15 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 15 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 12 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 12 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 11 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 11 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 11 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 10 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 10 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 9 |
| Rear Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 9 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 9 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 8 |
| Front Brake excessively binding |1.2.1 |f|| | 8 |
| Rear Position lamp not working (4.2.1 (a)) | 7 |
| Stop lamp remains on when the brakes are released | 7 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 7 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 7 |
| Rear reflector on motorcycle missing |1.4.1| | 6 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 6 |
| Horn not working |7.7 |a| |ii|| | 5 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 5 |
| Horn not working (7.7 (a) (ii)) | 5 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 5 |
| Drive chain excessively loose |6.2.1d| | 4 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 4 |
| Front Position lamp not working (4.2.1 (a)) | 4 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 4 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 4 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 4 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 4 |
| Rear Brake excessively binding (1.2.1 (f)) | 4 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 3 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 3 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 3 |
| Front Brake disc contaminated (1.1.14 (b)) | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 3 |
| Headlamp light intensity severely reduced (4.1.4 (a)) | 3 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Nearside Front Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 3 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 3 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 3 |
| Rear Drive chain excessively loose (6.1.7 (c) (i)) | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Horn not working (7.7 (a)) | 3 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 3 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Rear Brake excessively binding |1.2.1 |f|| | 2 |
| Headlamp aim not tested |4.1.2 |b|| | 2 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Nearside Front Direction indicator not working |4.4.1 |a| |ii|| | 2 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 2 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Handlebar excessively deformed (2.2.1 (c) (i)) | 2 |
| Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 2 |
| Riders seat insecure (6.2.5 (a) (ii)) | 2 |
| Front Brake fluid significantly below minimum mark |1.1.10 |d| |ii|| | 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 Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Headlamp light source and lamp not compatible (4.1.4 (c)) | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Horn not working |1.7.3a| | 2 |
| Front Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Front Brake lever is so short that the brake cannot be readily applied (1.1.2 (d)) | 2 |
| Central Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Offside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Rear Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 2 |
| Rear Wheel bearing play so excessive that directional control is impaired (5.1.3 (a) (ii)) | 2 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 2 |