| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 16 |
| Drive chain excessively loose |6.2.1d| | 10 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 10 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 8 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear reflector on motorcycle missing |1.4.1| | 5 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 4 |
| Rear Footrest missing |6.2.1a| | 4 |
| Horn not working |1.7.3a| | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Nearside Rear Direction indicators not working |1.5.1c| | 4 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Nearside Rear Footrest missing |6.2.1a| | 3 |
| Registration plate issues | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Direction indicator not working |1.5.1c| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Stop lamp emits other than a steady red light |1.3.1b| | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 2 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Rear Direction indicator insecure |1.5.3b| | 1 |
| Fuel cap ineffective (6.1.3 (b) (i)) | 1 |
| Rear Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Brake linkage clevis joint excessively worn |3.2.A1d| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear suspension component loose swing arm |2.4.A.1a| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 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 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Front Brake lever has insufficient reserve travel |1.1.2 |a|| | 1 |
| Front Brake lever insecure |1.1.2 |e| |i|| | 1 |
| Fuel cap ineffective |6.1.3 |b| |i|| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Fuel cap does not fasten securely by a positive means |7.2.2b| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Engine mounting/bracket excessively loose |6.1.8 |a| |ii|| | 1 |
| Rear Suspension arm attachment bracket/mounting insecure |5.3.3 |a| |i|| | 1 |
| Handlebar so insecure it is likely to become detached |2.2.1 |b| |ii|| | 1 |
| Front Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Front Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Front wheel spindle securing nut locking device insecure |2.3.5a| | 1 |
| Front wheel spindle loose |2.3.5a| | 1 |
| Front Brake fluid reservoir fluid level significantly below minimum level (1.1.10 (d) (ii)) | 1 |
| Headlamp reflector seriously defective (4.1.1 (b) (ii)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Exhaust silencer insecure (8.1.1 (b) (i)) | 1 |
| Nearside Rear Shock absorber missing (5.3.2 (a) (ii)) | 1 |
| Offside Rear Shock absorber missing (5.3.2 (a) (ii)) | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Front Headlamp damaged and function impaired |1.2.3a| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 1 |
| Offside Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear Footrest insecure |6.2.1a| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |