| Most common failures | No# failures |
|---|
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 15 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 14 |
| Headlamp aim out of alignment | 12 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Horn not working |1.7.3a| | 12 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 12 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 11 |
| Steering headbearing has excessive free play |2.2.2| | 10 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 8 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 7 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 6 |
| Registration plate issues | 5 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Horn control defective |1.7.2a| | 3 |
| Front Steering headbearing has excessive free play |2.2.2| | 3 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Headlamp switch faulty |1.2.4| | 3 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Steering linkage has excessive free play |2.2.2| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 2 |
| Fuel cap sealing washer missing |7.2.2c| | 2 |
| Rear Brake locking device missing |3.2.A1e| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Fuel pipe union leaking |7.2.1a| | 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 Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Horn not working when all lights on inc stop lamp |1.7.3a| | 1 |
| Offside Front suspension assembly component loose |2.3.1| | 1 |
| Rear wheel insecure |4.2.3b| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Headlamp incorrect colour |1.2.1| | 1 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Front Brake lever pivots excessively worn |3.1.3a| | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Nearside Engine mounting/bracket bracket damaged or deteriorated resulting in excessive movement |6.1.8 |a| |i|| | 1 |
| Front Gradient brake test indicates a severely juddering brake |3.3.D1d| | 1 |
| Rear Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Rear Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Front Front wheel spindle securing nut locking device insecure |2.3.3a| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Rear Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Centre Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Fuel cap missing |7.2.2a| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Decelerometer brake test no brake control achieves an efficiency of 30% |3.3.E1a| | 1 |
| Rear Built up wheel has a loose bolt/s |4.2.1c| | 1 |
| Rear Brake drum|s| insecure |3.2.A1g| | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Inner Front Upper Riders seat insecure |6.2.1a| | 1 |
| Centre Rear Lower Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Front Position lamp switch faulty |1.1.4a| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Nearside Lower Front suspension assembly component loose |2.3.1| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Offside Front Throttle operating incorrectly |6.2.1f| | 1 |
| Nearside Fuel system component leaking |7.2.1a| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Front wheel spindle securing nut locking device insecure |2.3.3a| | 1 |
| Front Lower Motorcycle structure cracked |6.1.1a| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Rear Brake pedal attachment screws missing. |3.1.2b| | 1 |
| Headlamp insecure glass spins |1.2.3b| | 1 |
| Horn not loud enough to be heard by another road user with lights on |1.7.3a| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Front Front wheel spindle loose |2.3.3a| | 1 |
| Brake lever has inadequate reserve travel FRONT |3.1.3b| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Rear Shock absorber insecurely attached |5.3.2 |a| |i|| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Rear Stop lamp deteriorated and function impaired intermitant |1.3.3a| | 1 |
| Handlebar restricted in free movement from lock to lock mudguard mounting bolt fouling steering movement (2.1.4 (c)) | 1 |