| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 8 |
| Rear reflector missing (4.8.2 (a) (ii)) | 6 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 6 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 4 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 4 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Stop lamp remains on when the brakes are released | 3 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Registration plate lamp issues | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Nearside Rear Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Horn not working (7.7 (a)) | 2 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Footrest missing (6.2.12 (a)) | 1 |
| Throttle operating incorrectly revs up when turned right (6.2.7 (a) (i)) | 1 |
| Nearside Front Clutch lever shortened so it cannot be readily operated (6.2.7 (b)) | 1 |
| Offside Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Rear Footrest missing both (6.2.12 (a)) | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Headlamp aim unable to be tested (4.1.2 (b)) | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Nearside Rear Drive chain worn to excess Seized links (6.1.7 (c) (i)) | 1 |
| Rear Shock absorber has negligible damping effect Rear suspension seized & rigid (5.3.2 (b)) | 1 |
| Rear Stop lamp does not illuminate by the operation of both brake controls Does not illuminate when rear brake is applied (4.3.2 (a) (iii)) | 1 |
| Central Rear Lower Suspension component ball joint excessively worn Suspension linkages seized (5.3.4 (a) (i)) | 1 |
| Rear Shock absorber has negligible damping effect Suspension seized (5.3.2 (b)) | 1 |
| Rear Brake pedal has insufficient reserve travel Excessive travel (no hydraulic pressure in system) (1.1.2 (a)) | 1 |
| Nearside Rear Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Brake pedal pivot has excessive free play (1.1.1 (b)) | 1 |
| Central Rear Suspension arm likely to fail No dampning effect as linkages seized (5.3.3 (b) (ii)) | 1 |
| Central Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Rear Brake has no recorded effort at a wheel No pressure in system (1.2.1 (a) (ii)) | 1 |
| Nearside Rear Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Front Shock absorber insecurely attached (5.3.2 (a) (i)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Front Wheel excessively distorted (5.2.2 (c) (i)) | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Stop lamp not working Rear brake light not working (4.3.1 (a) (ii)) | 1 |
| Steering operation restricted in free movement from lock to lock throttle cable catching (2.1.4 (c)) | 1 |
| Rear Brake pedal is positioned so that the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Handlebar deformed to the extent that steering is affected (2.2.1 (c) (ii)) | 1 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 1 |
| Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Front Brake lever is so short that the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Brake pedal so insecure that the brake cannot be readily applied (1.1.2 (e) (ii)) | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Brake pedal pivot excessively worn (1.1.1 (b)) | 1 |
| Brake performance unable to be tested (1.2.1 (g)) | 1 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 1 |
| Nearside Rear Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Offside Rear Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Rear Suspension component modified so the suspension is inoperative stiff in action note depressing correctley and not returning properley (5.3.3 (c) (ii)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Front Wheel more than one fixing loose (5.2.1 (a) (ii)) | 1 |
| Rear Brake component insecure Locking device missing (1.1.21 (c)) | 1 |
| Rear Brake lever has abnormal movement of levers indicating excessive wear or maladjustment (1.1.15 (f)) | 1 |
| Front Horn not working (7.7 (a)) | 1 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Brake pedal has insufficient reserve travel (1.1.2 (a)) | 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 |
| Rear Exhaust system insecure (6.1.2 (a)) | 1 |