| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 102 |
| Registration plate issues | 61 |
| Rear reflector missing (4.8.2 (a) (ii)) | 57 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 21 |
| Rear reflector missing |4.8.2 |a| |ii|| | 18 |
| Registration plate lamp issues | 17 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 14 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 12 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 11 |
| 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|| | 8 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 8 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 8 |
| Stop lamp remains on when the brakes are released | 7 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 7 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 7 |
| Rear reflector on motorcycle missing |1.4.1| | 7 |
| Horn not working (7.7 (a)) | 6 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 6 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 5 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 5 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 5 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 4 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 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 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 3 |
| Nearside Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Exhaust markings indicating not for road use or similar wording |6.1.2 |c|| | 3 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 3 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Rear Brake has no recorded effort at a wheel (1.2.1 (a) (ii)) | 3 |
| Exhaust markings indicating not for road use or similar wording (6.1.2 (c)) | 3 |
| Nearside Footrest insecure |6.2.12 |a|| | 2 |
| Rear Brake fluid contaminated (1.8 (a)) | 2 |
| Nearside Front Footrest insecure |6.2.12 |a|| | 2 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 2 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Rear Brake excessively binding (1.2.1 (f)) | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Rear Brake master cylinder defective but brake still operating (1.1.10 (b) (i)) | 2 |
| Rear All direction indicators obviously incorrectly positioned (4.4.3 (a)) | 2 |
| Nearside Front Footrest insecure (6.2.12 (a)) | 2 |
| Dipswitch does not operate immediately when selected on main beam |4.1.3 |b|| | 2 |
| Nearside Front Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Central Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 2 |