| Most common failures | No# failures |
|---|
| Rear reflector missing (4.8.2 (a) (ii)) | 75 |
| Headlamp aim out of alignment | 69 |
| Registration plate issues | 31 |
| Registration plate lamp issues | 18 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 14 |
| Front Brake excessively binding (1.2.1 (f)) | 10 |
| Rear Brake excessively binding (1.2.1 (f)) | 10 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 8 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 6 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 6 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 5 |
| 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)) | 5 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 4 |
| Central Rear Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Rear Position lamp not working (4.2.1 (a)) | 4 |
| Horn not working (7.7 (a)) | 4 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 3 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 3 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 3 |
| Offside Rear Footrest missing (6.2.12 (a)) | 3 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Front Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 3 |
| Rear Drive chain excessively tight (6.1.7 (k) (i)) | 3 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 3 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Rear Footrest missing both (6.2.12 (a)) | 2 |
| Offside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Headlamp aim not tested (4.1.2 (b)) | 2 |
| Rear Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 2 |
| Front Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 2 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Front Brake fluid contaminated (1.8 (a)) | 2 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 2 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Rear Footrest missing (6.2.12 (a)) | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Drive chain excessively loose dangerous (6.1.7 (c) (i)) | 1 |
| Rear Stop lamp lens defective such that the emitted light is adversely affected (4.3.1 (b) (ii)) | 1 |
| Steering headbearing excessively stiff or notchy EXCESSIVELY NOTCHY (2.2.2 (f) (i)) | 1 |
| Central Rear Lower Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Nearside Front Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Stop lamp lens defective such that the emitted light is adversely affected (4.3.1 (b) (ii)) | 1 |
| Rear Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Stop lamp switch with a delay in operation Flashing light, delayed operation for steady light. (4.3.2 (a) (ii)) | 1 |
| Offside Front Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Central Rear Rear reflector missing Rear Reflector Missing (4.8.2 (a) (ii)) | 1 |
| Offside Rear Direction indicator incorrect colour (4.4.3 (a)) | 1 |
| Brake performance not tested (1.2.1 (g)) | 1 |
| Front Horn not working (7.7 (a) (ii)) | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Offside Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Nearside Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Nearside Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Front Headlamp light source and lamp not compatible (4.1.4 (c)) | 1 |
| Offside Rear Wheel fixing loose (single fixing) chain adjuster loose (5.2.1 (a) (ii)) | 1 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Front Handlebar deformed to the extent that steering is affected handlebars/front end twisted (2.2.1 (c) (ii)) | 1 |
| Offside Footrest insecure r/h foot peg insecure and bent (6.2.12 (a)) | 1 |
| Rear Drive chain so loose it is likely to fail chain loose and heavily rusted (6.1.7 (c) (ii)) | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Offside Footrest insecure (6.2.12 (a)) | 1 |
| Offside Rear Brake lever pivot excessively tight (1.1.1 (a)) | 1 |
| Front Brake lever has insufficient reserve travel front brake lever (1.1.2 (a)) | 1 |
| Footrest missing Nearside pillion footrest missing (6.2.12 (a)) | 1 |
| Rear Upper Position lamp not working (4.2.1 (a)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Front Valve stem seriously misaligned (5.2.3 (j)) | 1 |
| Central Rear Upper Rear reflector missing rear reflector missing - added as needed (4.8.2 (a) (ii)) | 1 |
| Rear Brake fluid contaminated (1.8 (a)) | 1 |
| Steering headbearing excessively stiff or notchy head stock bearings very knotchy (2.2.2 (f) (i)) | 1 |
| Front Valve stem seriously damaged cracking badly needs replacing (5.2.3 (j)) | 1 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Brake lever insecure (1.1.2 (e) (i)) | 1 |
| Clutch lever positioned so it cannot be readily operated (6.2.7 (b)) | 1 |
| Central Rear Upper Rear reflector missing rear reflector missing - added as necessary (4.8.2 (a) (ii)) | 1 |
| Brake pedal not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 1 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Valve stem seriously damaged Badly perished (5.2.3 (j)) | 1 |
| Front Headlamp incorrect colour (4.1.4 (a)) | 1 |
| Rear Brake pedal is bent and the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Front Brake lever insecure (1.1.2 (e) (i)) | 1 |
| Front Brake linkage has abnormal movement of levers indicating excessive wear or maladjustment (1.1.15 (f)) | 1 |
| Central Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Nearside Front Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 1 |
| Nearside Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Wheel spindle locking device missing (5.2.1 (d)) | 1 |
| Suspension rod pin or bush excessively worn Front suspension linkage bush seized (5.3.4 (a) (i)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Throttle operating incorrectly sticks open on full right lock (6.2.7 (a) (i)) | 1 |
| Rear Brake caliper inadequately mounted (1.1.16 (c) (i)) | 1 |
| Offside Front Brake component insecure (1.1.21 (c)) | 1 |
| Rear Headlamp reflector missing (4.1.1 (b) (ii)) | 1 |
| Brake lever has restricted free movement (1.1.15 (e)) | 1 |
| Rear brake disc in such a condition that it is seriously weakened | 1 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Front Brake lever is bent and the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Rear Brake lagging in operation (1.2.1 (d)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |