| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 83 |
| Registration plate lamp issues | 75 |
| Registration plate issues | 69 |
| Rear reflector missing (4.8.2 (a) (ii)) | 51 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 30 |
| Rear reflector on motorcycle missing |1.4.1| | 30 |
| Rear reflector missing |4.8.2 |a| |ii|| | 18 |
| Drive chain excessively loose |6.2.1d| | 12 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 11 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 11 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 9 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 8 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 8 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 8 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 7 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 7 |
| Stop lamp remains on when the brakes are released | 7 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 7 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 7 |
| Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 6 |
| All direction indicators not working (4.4.1 (a) (ii)) | 5 |
| Nearside Rear Direction indicator missing (4.4.1 (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 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 5 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 5 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 5 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 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 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 4 |
| Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Nearside Front Direction indicator not working |4.4.1 |a| |ii|| | 4 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 4 |
| Rear All direction indicators obviously incorrectly positioned (4.4.3 (a)) | 4 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 4 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 3 |
| Rear Direction indicator obviously incorrectly positioned |4.4.3 |a|| | 3 |
| Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Rear Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 3 |
| Offside Rear Direction indicator missing (4.4.1 (a) (ii)) | 3 |
| Front Brake excessively binding (1.2.1 (f)) | 3 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 3 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 3 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 3 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 3 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 3 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Front Direction indicator adversely affected by the operation of another lamp (4.4.3 (b)) | 3 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 3 |
| Rear Brake caliper inadequately mounted (1.1.16 (c) (i)) | 3 |
| Offside Rear Footrest missing (6.2.12 (a)) | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Rear Wheel spindle loose (5.2.1 (c) (i)) | 3 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Nearside Direction indicator not working |4.4.1 |a| |ii|| | 3 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 3 |
| Rear Brake excessively binding (1.2.1 (f)) | 2 |
| Exhaust silencer insecure |8.1.1 |b| |i|| | 2 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Direction indicator adversely affected by the operation of another lamp (4.4.3 (b)) | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Front Brake fluid reservoir fluid not visible (1.1.10 (d) (iii)) | 2 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 2 |
| Front Brake lever insecure (1.1.2 (e) (i)) | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Headlamp insecure (4.1.1 (c)) | 2 |
| Front position lamp incorrect colour |1.1.2a| | 2 |
| Rear Stop lamp missing |4.3.1 |a| |ii|| | 2 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 2 |
| Rear Direction indicator adversely affected by the operation of another lamp |4.4.3 |b|| | 2 |
| Nearside Front Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Rear Lower Shock absorber has an excessively worn bush (5.3.2 (c)) | 2 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Rear Drive chain excessively loose |6.1.7 |c| |i|| | 2 |
| Nearside Rear Direction indicator incorrect colour (4.4.3 (a)) | 2 |
| Offside Rear Direction indicator incorrect colour (4.4.3 (a)) | 2 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 2 |
| Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |
| Front Position lamp not working (4.2.1 (a)) | 2 |
| Rear Footrest missing (6.2.12 (a)) | 2 |
| Stop lamp does not illuminate immediately a brake applies Switch adjustment. |1.3.1a| | 2 |
| Rear Direction indicator adversely affected by the operation of another lamp (4.4.3 (b)) | 2 |
| Front Brake grabbing severely (1.2.1 (c)) | 2 |
| Headlamp aim not tested (4.1.2 (b)) | 2 |
| Rear Position lamp adversely affected by the operation of another lamp |4.2.3 |b|| | 2 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 2 |
| Rear Position lamp adversely affected by the operation of another lamp (4.2.3 (b)) | 2 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 2 |
| Nearside Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 2 |
| Offside Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 2 |
| Exhaust system insecure |6.1.2 |a|| | 2 |
| Horn not working |1.7.3a| | 2 |
| Rear Direction indicator missing (4.4.1 (a) (ii)) | 2 |
| Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 2 |
| Rear All direction indicators adversely affected by the operation of another lamp (4.4.3 (b)) | 2 |
| All direction indicators adversely affected by the operation of another lamp (4.4.3 (b)) | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Exhaust noise is clearly in excess of that emitted by a similar motor bicycle fitted with a standard silencer in average condition |7.1.2| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 2 |
| Front Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 2 |
| Nearside Rear Direction indicator with a multiple light source more than 1/2 not functioning (4.4.1 (a) (ii)) | 2 |
| Rear Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 2 |
| Rear Drive chain excessively tight (6.1.7 (k) (i)) | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Rear Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |