| Most common failures | No# failures |
|---|
| Rear reflector missing (4.8.2 (a) (ii)) | 31 |
| Registration plate lamp issues | 24 |
| Headlamp aim out of alignment | 11 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 10 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 8 |
| Registration plate issues | 8 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 7 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 7 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 6 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 6 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 6 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 6 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 6 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 5 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 5 |
| Stop lamp remains on when the brakes are released | 4 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 4 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 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 |
| Front Brake excessively binding (1.2.1 (f)) | 3 |
| Rear Drive chain sprocket so worn it is likely to fail (6.1.7 (c) (ii)) | 3 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 3 |
| Rear Brake excessively binding (1.2.1 (f)) | 3 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 3 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 3 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 3 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 2 |
| Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 2 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Dipswitch does not operate immediately when selected on main beam (4.1.3 (b)) | 2 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 2 |
| Brake pedal has insufficient reserve travel (1.1.2 (a)) | 2 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Rear Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 2 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 2 |
| Front Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 2 |
| Offside Rear Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Rear Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Drive chain sprocket so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Rear Brake lever has abnormal movement of levers indicating excessive wear or maladjustment (1.1.15 (f)) | 1 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 1 |
| Headlamp lens seriously defective loose (4.1.1 (b) (ii)) | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Nearside Rear Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Rear Stop lamp does not illuminate by the operation of both brake controls Rear brake light switch damaged (4.3.2 (a) (iii)) | 1 |
| Front Wheel excessively distorted (5.2.2 (c) (i)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |
| Nearside Front Motorcycle structure has a fracture which is likely to adversely affect braking or steering Fork is cracked (6.1.1 (a) (ii)) | 1 |
| Rear Wheel spindle or securing nut(s) so insecure that wheel security or steering control is adversely affected (5.2.1 (c) (ii)) | 1 |
| Offside Rear Footrest missing (6.2.12 (a)) | 1 |
| Suspension component pin or bush excessively worn Swing arm (5.3.4 (a) (i)) | 1 |
| Suspension arm pin or bush excessively worn rear swing arm. (5.3.4 (a) (i)) | 1 |
| Front Brake grabbing severely (1.2.1 (c)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Rear Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Nearside Shock absorber has a serious fluid leak fork seal leaking (5.3.2 (b)) | 1 |
| Rear Brake caliper insecure free play on rear spindle mounting (1.1.16 (c) (i)) | 1 |
| Front Stop lamp not working brakelight switch (4.3.1 (a) (ii)) | 1 |
| Nearside Rear Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Central Front Upper Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Central Front Lower Engine mounting/bracket bracket missing engine bolts missing (6.1.8 (a) (ii)) | 1 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Rear Brake pedal insecure (1.1.2 (e) (i)) | 1 |
| Nearside Front Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 1 |
| Rear Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 1 |
| Rear Suspension component pin or bush excessively worn swinging arm (5.3.4 (a) (i)) | 1 |
| Roller brake test brake efficiency less than 27.5% overall (1.2.2 (a) (ii)) | 1 |
| Rear Suspension arm attachment bracket/mounting insecure Rear swinging arm bolt loose (5.3.3 (a) (i)) | 1 |
| Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Stop lamp emits other than a steady red light (4.3.3 (a) (ii)) | 1 |
| Rear Footrest missing Nearside and Offside (6.2.12 (a)) | 1 |
| Nearside Rear Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Front Brake disc contaminated brake fluid (1.1.14 (b)) | 1 |
| Rear Exhaust markings indicating not for road use or similar wording (6.1.2 (c)) | 1 |
| Rear Headlamp reflector missing PRS Reflector fitted (4.1.1 (b) (ii)) | 1 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Exhaust silencer insecure (8.1.1 (b) (i)) | 1 |
| Rear Suspension arm pin or bush excessively worn Side play (5.3.4 (a) (i)) | 1 |
| Handlebar excessively deformed (2.2.1 (c) (i)) | 1 |
| Rear Brake cylinder operating mechanism has excessive travel (1.1.16 (e) (i)) | 1 |
| Clutch lever shortened so it cannot be readily operated (6.2.7 (b)) | 1 |
| Rear Stop lamp not working secondary rear brake fitted on left bar (4.3.1 (a) (ii)) | 1 |
| Footrest missing both pillion footrests missing (6.2.12 (a)) | 1 |
| Stop lamp not working from front brake lever (4.3.1 (a) (ii)) | 1 |
| Rear Wheel spindle loose (5.2.1 (c) (i)) | 1 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Rear Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 1 |
| Roller brake test No brake control achieves an efficiency of 30% (1.2.2 (a) (i)) | 1 |