| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 17 |
| Rear reflector missing (4.8.2 (a) (ii)) | 13 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 10 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 8 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 7 |
| Central Rear Rear reflector missing (4.8.2 (a) (ii)) | 6 |
| Horn not working (7.7 (a)) | 6 |
| Registration plate lamp issues | 5 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 4 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 3 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Central Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Front Brake disc contaminated (1.1.14 (b)) | 2 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 2 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 2 |
| Front Brake lever is so short that the brake cannot be readily applied (1.1.2 (d)) | 2 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 2 |
| Rear Suspension component modified so the suspension is inoperative (5.3.3 (c) (ii)) | 2 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 2 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 2 |
| Central Front Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Nearside Rear Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Rear Brake linkage has abnormal movement of levers indicating excessive wear or maladjustment (1.1.15 (f)) | 1 |
| Nearside Front Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Front Brake lever insecure (1.1.2 (e) (i)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 1 |
| Throttle operating incorrectly revs up when turned on right hand lock (6.2.7 (a) (i)) | 1 |
| Front Position lamp switch does not illuminate all position lamps with a single operation (4.2.2 (a)) | 1 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Offside Direction indicator missing (4.4.1 (a) (ii)) | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| All direction indicators light intensity significantly reduced (4.4.3 (a)) | 1 |
| Offside Rear Direction indicator incorrect colour (4.4.3 (a)) | 1 |
| Brake lever is so short that the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Offside Rear Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Offside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Steering operation linkage fouling when handlebars turned from lock to lock (2.1.4 (a)) | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Central Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Nearside Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Nearside Rear Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Nearside Rear Wheel hub excessively worn hub bearing (5.2.1 (b) (i)) | 1 |
| Handlebar excessively deformed misaligned (2.2.1 (c) (i)) | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls front brake control does not operate stop light. (4.3.2 (a) (iii)) | 1 |
| Rear Direction indicator obviously incorrectly positioned NEARSIDE AND OFFSIDE - WRONG WAY ROUND (4.4.3 (a)) | 1 |
| Nearside Front Shock absorber has negligible damping effect Fork seal (5.3.2 (b)) | 1 |
| Rear Suspension component pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Front Position lamp light intensity significantly reduced (4.2.3 (a) (ii)) | 1 |
| Rear Drive chain sprocket so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Rear Wheel bearing play so excessive it is likely to break up Rear sprocket insecure (5.1.3 (a) (ii)) | 1 |
| Offside Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Rear Shock absorber has negligible damping effect restricted movement (5.3.2 (b)) | 1 |
| Throttle operating incorrectly revs on o/s steering lock (6.2.7 (a) (i)) | 1 |
| Rear Brake pedal pivot has excessive free play (1.1.1 (b)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Stop lamp not working stop light not working with [hand brake] (4.3.1 (a) (ii)) | 1 |
| Brake pedal pivot has excessive free play brake pedal excessive play (1.1.1 (b)) | 1 |
| Steering operation linkage fouling when handlebars turned from lock to lock engine revving when going from lock to lock (2.1.4 (a)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Stop lamp not working front lever (4.3.1 (a) (ii)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls not working from rear brake (4.3.2 (a) (iii)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Shock absorber has negligible damping effect suspension seized (5.3.2 (b)) | 1 |
| Wheel alignment incorrect which adversely affects the steering front wheel and handle bars missaligned (2.4 (a)) | 1 |
| Headlamp aim unable to be tested (4.1.2 (b)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Central Front Brake excessively binding (1.2.1 (f)) | 1 |
| Central Rear Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Offside Front Handlebar retaining device loose (2.2.1 (b) (i)) | 1 |
| Steering linkage locking device ineffective (2.1.3 (d)) | 1 |
| Rear Shock absorber likely to become detached (5.3.2 (a) (ii)) | 1 |