| Most common failures | No# failures |
|---|
| Rear reflector missing (4.8.2 (a) (ii)) | 81 |
| Headlamp aim out of alignment | 56 |
| Registration plate issues | 49 |
| Rear reflector on motorcycle missing |1.4.1| | 47 |
| Registration plate lamp issues | 42 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 29 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 27 |
| Rear Brake excessively binding (1.2.1 (f)) | 20 |
| Rear reflector missing |4.8.2 |a| |ii|| | 19 |
| Front Brake excessively binding (1.2.1 (f)) | 19 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 18 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 18 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 17 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 16 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 16 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 15 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 14 |
| Stop lamp remains on when the brakes are released | 13 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 13 |
| Drive chain excessively loose |6.2.1d| | 12 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 12 |
| Offside Rear Footrest missing (6.2.12 (a)) | 12 |
| 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)) | 12 |
| Horn not working (7.7 (a)) | 12 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 11 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 11 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 9 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Rear Footrest missing (6.2.12 (a)) | 9 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 9 |
| Front Position lamp not working (4.2.1 (a)) | 9 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 9 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 8 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 8 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 7 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 7 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 7 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Drive chain worn to excess |6.2.1e| | 6 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 6 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 6 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 6 |
| Horn not working (7.7 (a) (ii)) | 6 |
| Stop lamp not working (4.3.1 (a) (ii)) | 6 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 6 |
| Steering headbearing has excessive free play |2.2.2| | 5 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 5 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 5 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 5 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 5 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 5 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 5 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 5 |
| Rear Brake excessively binding |1.2.1 |f|| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 4 |
| Rear Brake has no recorded effort at a wheel (1.2.1 (a) (ii)) | 4 |
| Front Brake disc contaminated (1.1.14 (b)) | 4 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 4 |
| Rear Position lamp not working (4.2.1 (a)) | 4 |
| Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 4 |
| Nearside Rear Footrest missing |6.2.1a| | 3 |
| Offside Rear Footrest missing |6.2.1a| | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 3 |
| All direction indicators not working (4.4.1 (a) (ii)) | 3 |
| Front Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 3 |
| Roller brake test No brake control achieves an efficiency of 30% (1.2.2 (a) (i)) | 3 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 3 |
| Rear Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 3 |
| Clutch lever positioned so it cannot be readily operated (6.2.7 (b)) | 3 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Front Brake disc significantly and obviously worn |1.1.14 |a| |i|| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Horn not working |1.7.3a| | 2 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Rear Footrest missing |6.2.1a| | 2 |
| Handlebar mounting clamp loose |2.1.1a| | 2 |
| Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 2 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 2 |
| Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 2 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Front Brake excessively binding |1.2.1 |f|| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Horn not working (7.7 (a) (ii)) | 2 |
| Nearside Front Shock absorber has a serious fluid leak fork seal (5.3.2 (b)) | 2 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 2 |
| Handlebar retaining device loose (2.2.1 (b) (i)) | 2 |
| Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 2 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Front Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 2 |
| Rear Drive chain sprocket so worn it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Front Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 2 |
| Front Footrest insecure (6.2.12 (a)) | 2 |
| Front Brake lagging in operation (1.2.1 (d)) | 2 |
| Rear Brake lagging in operation (1.2.1 (d)) | 2 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 2 |
| Nearside Rear Direction indicator likely to become detached (4.4.1 (c) (ii)) | 2 |
| Brake pedal insecure (1.1.2 (e) (i)) | 2 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 2 |
| Rear 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 Stop lamp does not illuminate by the operation of both brake controls REAR BRAKE LIGHT (4.3.2 (a) (iii)) | 2 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Rear Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 2 |
| Rear Drive chain worn to excess (6.1.7 (c) (i)) | 2 |
| Horn sound not in accordance with requirements (7.7 (c)) | 2 |
| Exhaust markings indicating not for road use or similar wording (6.1.2 (c)) | 2 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 2 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 2 |
| Headlamp aim unable to be tested (4.1.2 (b)) | 2 |
| Drive chain sprocket excessively loose (6.1.7 (c) (i)) | 2 |
| Nearside Front Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Front Shock absorber has a serious fluid leak both (5.3.2 (b)) | 2 |