| Most common failures | No# failures |
|---|
| Registration plate issues | 45 |
| Rear reflector missing (4.8.2 (a) (ii)) | 38 |
| Rear reflector on motorcycle missing |1.4.1| | 28 |
| Horn not working (7.7 (a)) | 14 |
| Headlamp aim out of alignment | 12 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 10 |
| Rear reflector missing |4.8.2 |a| |ii|| | 9 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 9 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 8 |
| Horn not working |1.7.3a| | 8 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 7 |
| Horn missing |1.7.1| | 7 |
| Rear Position lamp not working (4.2.1 (a)) | 7 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 7 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 7 |
| Horn not working (7.7 (a) (ii)) | 6 |
| Horn not working |7.7 |a| |ii|| | 6 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 5 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 5 |
| Stop lamp remains on when the brakes are released | 5 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 5 |
| Front Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 5 |
| Registration plate lamp issues | 5 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Front Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 3 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Front Position lamp not working (4.2.1 (a)) | 3 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 3 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 3 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 3 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 3 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 2 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Headlamp aim not tested (4.1.2 (b)) | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Horn control defective |1.7.2a| | 2 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Front Brake lever has insufficient reserve travel |1.1.2 |a|| | 2 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 2 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Rear Drive chain excessively loose |6.1.7 |c| |i|| | 2 |
| Drive chain horseshoe locking device likely to become detached (6.1.7 (j) (ii)) | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Rear Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 2 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Stop lamp missing |1.3.3a| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Rear Wheel spoke excessively loose x2 (5.2.2 (d)) | 1 |
| Nearside Front Lower Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Nearside Rear Lower Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Offside Rear Lower Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Offside Front Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Rear Wheel excessively distorted damage to alloy rim greater than 2mm (5.2.2 (c) (i)) | 1 |
| Stop lamp not working Brake lever (4.3.1 (a) (ii)) | 1 |
| Stop lamp not working Brake pedal (4.3.1 (a) (ii)) | 1 |
| Wheel spoke missing (5.2.2 (d)) | 1 |
| Vehicle identification number not legible |0.2 |b|| | 1 |
| Central Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Horn not working |7.7 |a| |ii|| | 1 |
| Drive chain horseshoe locking device likely to become detached |6.1.7 |j| |ii|| | 1 |
| Drive chain excessively loose |6.2.1d| | 1 |
| Rear Lower Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Rear Wheel bearing has excessive play both (5.1.3 (a) (i)) | 1 |
| Offside Front Shock absorber has a serious fluid leak fork seal leaking (5.3.2 (b)) | 1 |
| Front Wheel spoke excessively bent multiple spokes all on the left hand side |5.2.2 |d|| | 1 |
| Rear Brake cable insecure | 1 |
| Nearside Steering operation linkage fouling when handlebars turned from lock to lock steering lock stop missing |2.1.4 |a|| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Shock absorber has a serious fluid leak both front (5.3.2 (b)) | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Headlamp aim not tested |4.1.2 |b|| | 1 |
| Rear Wheel spoke excessively loose two |5.2.2 |d|| | 1 |
| Stop lamp not working both brakes affected (4.3.1 (a) (ii)) | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride Split link wrong way round |6.2.1h| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Stop lamp not working intermitent (4.3.1 (a) (ii)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Front Stop lamp missing (4.3.1 (a) (ii)) | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride Split Link Incorrect Direction |6.2.1h| | 1 |
| Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Offside Rear Outer Suspension component pin or bush excessively worn Swinging arm bearing has excessive movement. (5.3.4 (a) (i)) | 1 |
| Central Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Nearside Rear Wheel spoke excessively loose Several spokes loose. (5.2.2 (d)) | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Dipswitch does not operate immediately when selected on main beam (4.1.3 (b)) | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Horn not working (7.7 (a)) | 1 |
| Front Brake lagging in operation (1.2.1 (d)) | 1 |
| Rear Position lamp not working brake light (4.2.1 (a)) | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Wheel spoke missing (5.2.2 (d)) | 1 |
| Front Wheel spoke excessively loose (5.2.2 (d)) | 1 |
| Rear Drive chain sprocket so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Central Rear Lower Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Front Upper Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Central Front Exhaust system insecure (6.1.2 (a)) | 1 |
| Central Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Steering operation linkage fouling when handlebars turned from lock to lock (2.1.4 (a)) | 1 |
| Rear Brake has no recorded effort at a wheel |1.2.1 |a| |ii|| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear Lower Suspension component pin or bush likely to become detached (5.3.4 (a) (ii)) | 1 |
| Offside Front Front shock absorber seal failed and leaking oil right hand fork seal leaking. |2.3.3| | 1 |
| Rear Rear wheel bearings have excessive free play rear wheel bearing worn |2.4.A.2c| | 1 |
| Rear Rear suspension bush has excessive free play rear top bush worn on shock |2.4.A2a|i|| | 1 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Stop lamp not working front brake operated (4.3.1 (a) (ii)) | 1 |
| Stop lamp not working rear brake operated (4.3.1 (a) (ii)) | 1 |
| Stop lamp does not illuminate immediately a brake applies Front |1.3.1a| | 1 |
| Stop lamp does not illuminate immediately a brake applies Rear |1.3.1a| | 1 |
| Offside Footrest insecure (6.2.12 (a)) | 1 |
| Rear Wheel spindle loose (5.2.1 (c) (i)) | 1 |
| Front Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Rear Brake linkage excessively worn |1.1.15 |b|| | 1 |
| Offside Front Shock absorber has a serious fluid leak OIL SEAL LEAKING |5.3.2 |b|| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride split link badly worn |6.2.1h| | 1 |
| Shock absorber has a serious fluid leak BOTH FORK SEALS (5.3.2 (b)) | 1 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Horn sound not in accordance with requirements |7.7 |c|| | 1 |
| Rear Chain guard insecure (6.1.7 (i)) | 1 |
| Lower Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Stop lamp not working BOHT (4.3.1 (a) (ii)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Front Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Position lamp switch allows the rear position lamp to be switched off when the headlamp(s) are on rear light not functioning on high beam (4.2.2 (a)) | 1 |
| Front Position lamp switch does not illuminate all position lamps with a single operation high beam plus position lamp fail to illuminate on high beam position (4.2.2 (a)) | 1 |
| Front Headlamp light intensity severely reduced Dip beam poor light (bulb not located properly) (4.1.4 (a)) | 1 |
| Lower Suspension component pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Offside Steering operation fouling on the fuel tank or bodywork on full lock Fork leg fouling radiator guard on right full lock (2.1.4 (b)) | 1 |
| Front Stop lamp not working Front brake applied, no stop lamp (4.3.1 (a) (ii)) | 1 |
| Rear Stop lamp not working Rear brake applied, no stop lamp (4.3.1 (a) (ii)) | 1 |
| Front Wheel bearing play so excessive that directional control is impaired |5.1.3 |a| |ii|| | 1 |
| Rear Chain guard insecure Chain guide loose. |6.1.7 |i|| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| All position lamps not working |4.2.1 |a|| | 1 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Rear Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Front Horn not working (7.7 (a) (ii)) | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Nearside Rear Drive chain sprocket so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Nearside Rear Drive chain worn to excess (6.1.7 (c) (i)) | 1 |