| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 16 |
| Registration plate issues | 8 |
| Headlamp aim out of alignment | 8 |
| Drive chain excessively loose |6.2.1d| | 7 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 6 |
| Rear reflector missing (4.8.2 (a) (ii)) | 5 |
| Drive chain worn to excess |6.2.1e| | 5 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 5 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Horn not working |1.7.3a| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Horn not working (7.7 (a)) | 3 |
| Registration plate lamp issues | 3 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Rear reflector missing |4.8.2 |a| |ii|| | 3 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Front Headlamp insecure (4.1.1 (c)) | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 2 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 2 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 2 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Rear Footrest missing (6.2.12 (a)) | 1 |
| Front Direction indicator not working L/H (4.4.1 (a) (ii)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Rear Suspension component has excessive wear or free play rear swinging arm, free play on mounting through rear of gearbox (5.3.3 (d)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Offside Front Upper Brake lever pivot excessively worn brake lever snapped (1.1.1 (b)) | 1 |
| Nearside Front Upper Brake lever pivot excessively worn clutch lever snapped (1.1.1 (b)) | 1 |
| Nearside Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Nearside Exhaust silencer insecure |8.1.1 |b| |i|| | 1 |
| Upper Fuel cap leaking no seal / hole in cap |6.1.3 |b| |i|| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Rear Position lamp adversely affected by the operation of another lamp Lamp insecure. (4.2.3 (b)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Drive chain fouling another component fouling swingarm. |6.2.1d| | 1 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Central Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Rear Brake fluid reservoir fluid level significantly below minimum level (1.1.10 (d) (ii)) | 1 |
| Stop lamp does not emit a steady light comes on then goes off the further the brake is pulled |1.3.1b| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Nearside Clutch lever shortened so it cannot be readily operated (6.2.7 (b)) | 1 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| 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| | 1 |
| Horn sound not in accordance with requirements not loud enough (7.7 (c)) | 1 |
| Nearside Front All position lamps not working |4.2.1 |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 |
| Nearside Rear Footrest missing |6.2.12 |a|| | 1 |
| Offside Rear Footrest missing |6.2.12 |a|| | 1 |
| Riders seat with a defective supporting structure |6.2.5 |a| |i|| | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Position lamp adversely affected by the operation of another lamp (4.2.3 (b)) | 1 |
| Rear Position lamp adversely affected by the operation of another lamp (4.2.3 (b)) | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Stop lamp does not illuminate immediately a brake applies front control |1.3.1a| | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Central Lower Chain guard insecure |6.1.7 |i|| | 1 |
| Riders seat insecure |6.2.5 |a| |ii|| | 1 |
| Pillion seat insecure |6.2.6 |a| |ii|| | 1 |
| Front Brake fluid reservoir fluid level significantly below minimum level |1.1.10 |d| |ii|| | 1 |
| Rear Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 1 |
| Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 1 |
| Central Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear position lamp missing |1.1.1a| | 1 |
| Stop lamp missing |1.3.3a| | 1 |
| Rear Direction indicator missing |1.5.1a| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride Drive chain horse shoe |6.2.1h| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Brake caliper inadequately mounted bolts to long. |1.1.16 |c| |i|| | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Front Brake lever has abnormal movement of levers indicating excessive wear or maladjustment (1.1.15 (f)) | 1 |
| Rear Brake lever has abnormal movement of levers indicating excessive wear or maladjustment (1.1.15 (f)) | 1 |
| Front Brake has no recorded effort at a wheel |1.2.1 |a| |ii|| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Front Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Rear Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Rear Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |