| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 12 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Drive chain excessively loose |6.2.1d| | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 3 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Registration plate lamp issues | 2 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Horn not working |1.7.3a| | 2 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Offside Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Offside Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Centre Rear Upper Stop lamp does not illuminate immediately a brake applies back brake switch adjusted |1.3.1a| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Front Drive chain excessively loose |6.2.1d| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Rear Position lamp not working bulb replaced. (4.2.1 (a)) | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Rear Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Front Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Offside Front Horn not working |7.7 |a| |ii|| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Central Rear Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Front Brake caliper|s| insecure Disc cutting in to Caliper |3.2.A1j| | 1 |
| Rear Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Brake disc contaminated (1.1.14 (b)) | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Front Horn sound not in accordance with requirements |7.7 |c|| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Front Horn not working (7.7 (a) (ii)) | 1 |
| Front brake disc in such a condition that it is seriously weakened | 1 |
| Offside Outer Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Nearside Rear Direction indicator adversely affected by the operation of another lamp |4.4.3 |b|| | 1 |
| Steering headbearing has excessive wear or free play head bearing has notch in middle |2.2.2 |f| |i|| | 1 |
| Shock absorber has a serious fluid leak both (5.3.2 (b)) | 1 |
| Headlamp not working on dipped beam both (4.1.1 (a) (ii)) | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Front Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Rear Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Wheel bearing has excessive play near side (5.1.3 (a) (i)) | 1 |
| Rear Wheel bearing rough when rotated near side (5.1.3 (b) (i)) | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| 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)) | 1 |