| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 13 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Drive chain excessively loose |6.2.1d| | 11 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Offside Front Front position lamp incorrect colour |1.1.2a| | 1 |
| Offside Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Offside Front Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies pos /faulty brake switch |1.3.1a| | 1 |
| Offside Headlamp switch faulty |1.2.4| | 1 |
| Nearside Drive chain worn to excess |6.2.1e| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Horn missing |1.7.1| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Stop lamp not working when rear brake is applied (4.3.1 (a) (ii)) | 1 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Nearside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Central Front Handlebar excessively deformed |2.2.1 |c| |i|| | 1 |
| Central Front Horn not working |7.7 |a| |ii|| | 1 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Central Rear Stop lamp not working indicator not working on right hand rear |4.3.1 |a| |ii|| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Brake pedal is inoperative |3.1.3c| | 1 |
| Indicator switch defective |1.5.4| | 1 |
| Front Brake lever pivots excessively worn |3.1.3a| | 1 |
| Offside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Nearside Indicator switch insecure |1.5.4| | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Rear Motorcycle structure joining/attachment plate or fastening so insecure that structural rigidity is seriously reduced |6.1.1 |b| |ii|| | 1 |
| Offside Rear Motorcycle structure joining/attachment plate or fastening so insecure that structural rigidity is seriously reduced |6.1.1 |b| |ii|| | 1 |
| Rear Motorcycle structure joining/attachment plate or fastening insecure |6.1.1 |b| |i|| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Central Front Steering headbearing excessively stiff or notchy strip and grease |2.2.2 |f| |i|| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Centre Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Front Footrest insecure n/s drivers footpeg broken |6.2.1a| | 1 |
| Drive chain sprocket carrier worn to excess sprocket carrier bearing |6.2.1e| | 1 |
| Registration plate issues | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Footrest insecure |6.2.1a| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front Front wheel spindle loose Bearings worn, liable to collapse |2.3.3a| | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Registration plate lamp issues | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Front Stop lamp remains on when the brake is released control |1.3.1e| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Brake back plate|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Footrest missing |6.2.1a| | 1 |