| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 21 |
| Headlamp aim beam image kick up to the offside |1.6| | 17 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Rear reflector on motorcycle missing |1.4.1| | 12 |
| Registration plate issues | 9 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 9 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Drive chain excessively loose |6.2.1d| | 6 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Direction indicators not working |1.5.1c| | 5 |
| Horn not working |1.7.3a| | 5 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Front wheel bearings are excessively rough |2.3.5b| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 4 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Nearside Front Direction indicator missing |1.5.1a| | 3 |
| Offside Front Direction indicator missing |1.5.1a| | 3 |
| Rear wheel spindle loose |2.4.A.2b| | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Nearside Steering lock stop ineffective |2.1.3| | 2 |
| Offside Steering lock stop ineffective |2.1.3| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 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 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Offside Rear Direction indicator missing |1.5.1a| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Fuel system component insecure |7.2.1b| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 2 |
| Offside Rear 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| | 2 |
| Offside Front Direction indicators not working |1.5.1c| | 2 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Brake caliper|s| insecure |3.2.A1j| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Rear Brake performance not tested |3.3| | 1 |
| Inner Rear Lower Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Riders seat insecure |6.2.5 |a| |ii|| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front Upper Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Front Wheel spindle loose (5.2.1 (c) (i)) | 1 |
| Stop lamp deteriorated and function impaired |1.3.3a| | 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 |
| Nearside Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Indicator switch defective |1.5.4| | 1 |
| Nearside Rear Direction indicator missing |1.5.1a| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Centre Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Nearside Inner Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Centre Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Offside Rear Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Offside Rear Brake disc|s| securing bolt|s| missing |3.2.A1g| | 1 |
| Centre Front Riders seat insecure |6.2.1a| | 1 |
| Offside Rear Lower Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Rear Brake fluid reservoir insecurely mounted |3.2.B1a| | 1 |
| Offside Handlebar mounting clamp loose |2.1.1a| | 1 |
| Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Rear Brake disc|s| cracked |3.2.A1g| | 1 |
| Nearside Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Offside Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Offside Front Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Centre Front Fuel system component insecure |7.2.1b| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Rear Brake pipe inadequately supported |3.2.B2b| | 1 |
| Rear Brake pipe likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Front Steering lock stop ineffective |2.1.3| | 1 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Front Riders seat insecure |6.2.1a| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Rear Brake disc|s| securing bolt|s| missing |3.2.A1g| | 1 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Brake hose damaged | 1 |
| Rear Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Riders seat insecure Seat requires secure fitting |6.2.1a| | 1 |
| Upper Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Nearside Front Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Nearside Handlebar deformed |2.1.1b| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front Direction indicator missing |1.5.1a| | 1 |
| Rear Direction indicator missing |1.5.1a| | 1 |
| Footrest insecure |6.2.1a| | 1 |
| Nearside Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Offside Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Nearside Front Brake hose fouling |3.2.B3b| | 1 |
| Nearside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Front Brake hose excessively twisted |3.2.B3a| | 1 |
| Rear Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Nearside Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Drive chain sprocket excessively loose |6.1.7 |c| |i|| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Horn control not functioning. |1.7.2b| | 1 |
| Offside Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Offside Front position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Nearside Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Front Brake fluid reservoir insecurely mounted |3.2.B1a| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Nearside Front Position lamp switch insecure |1.1.4b| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Rear Brake linkage has abnormal movement due to excessive wear |3.2.A1i| | 1 |
| Front Front mudguard insecure |2.3.7| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Front wheel spindle securing nut|s| loose |2.3.5a| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Offside Footrest missing |6.2.1a| | 1 |
| Rear Brake pipe excessively chafed |3.2.B2a| | 1 |
| Rear Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Nearside Footrest missing |6.2.1a| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Rear position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |