| Most common failures | No# failures |
|---|
| Rear reflector missing (4.8.2 (a) (ii)) | 140 |
| Headlamp aim out of alignment | 83 |
| Registration plate issues | 40 |
| Rear Brake excessively binding (1.2.1 (f)) | 34 |
| Registration plate lamp issues | 34 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 32 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 30 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 30 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 27 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 26 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 23 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 22 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 22 |
| Rear reflector missing |4.8.2 |a| |ii|| | 21 |
| Front Brake excessively binding (1.2.1 (f)) | 20 |
| 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)) | 19 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 19 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 19 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 18 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 16 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 14 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 14 |
| Stop lamp remains on when the brakes are released | 11 |
| Offside Rear Footrest missing (6.2.12 (a)) | 11 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 10 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 9 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 9 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 9 |
| Rear Brake has no recorded effort at a wheel (1.2.1 (a) (ii)) | 8 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 8 |
| Rear Footrest missing (6.2.12 (a)) | 8 |
| Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 7 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 7 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 7 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 7 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 7 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 7 |
| Stop lamp not working (4.3.1 (a) (ii)) | 7 |
| Nearside Front Direction indicator missing (4.4.1 (a) (ii)) | 6 |
| Riders seat insecure (6.2.5 (a) (ii)) | 6 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 6 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 5 |
| Offside Front Direction indicator missing (4.4.1 (a) (ii)) | 5 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 5 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 5 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 5 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 5 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 5 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 5 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 4 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 4 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 4 |
| Horn not working (7.7 (a)) | 4 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 4 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 4 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 4 |
| Rear Drive chain worn to excess (6.1.7 (c) (i)) | 4 |
| Front Headlamp aim not tested (4.1.2 (b)) | 4 |
| Front Brake disc contaminated (1.1.14 (b)) | 4 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 4 |
| Nearside Front Direction indicator missing |4.4.1 |a| |ii|| | 3 |
| Nearside Handlebar mounting insecure (2.2.1 (a) (i)) | 3 |
| Nearside Front Footrest insecure (6.2.12 (a)) | 3 |
| Brake pedal has insufficient reserve travel (1.1.2 (a)) | 3 |
| Rear Brake lagging in operation (1.2.1 (d)) | 3 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 3 |
| Central Rear Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Offside Handlebar mounting insecure (2.2.1 (a) (i)) | 3 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 3 |
| Steering headbearing in such a condition that steering control is adversely affected (2.2.2 (f) (ii)) | 3 |
| Rear Brake pedal is bent and the brake cannot be readily applied (1.1.2 (d)) | 3 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Fuel cap ineffective (6.1.3 (b) (i)) | 3 |
| Nearside Handlebar excessively deformed (2.2.1 (c) (i)) | 3 |
| 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|| | 3 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 3 |
| Drive chain horseshoe locking device likely to become detached (6.1.7 (j) (ii)) | 3 |