| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 97 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 42 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 39 |
| Drive chain excessively loose |6.2.1d| | 37 |
| Steering headbearing has excessive free play |2.2.2| | 36 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 34 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 30 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 24 |
| Front wheel bearings are excessively rough |2.3.5b| | 23 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 23 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 23 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 21 |
| Drive chain worn to excess |6.2.1e| | 21 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 20 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 20 |
| Registration plate issues | 19 |
| Headlamp aim beam image kick up to the offside |1.6| | 18 |
| Front wheel bearings have excessive free play |2.3.5b| | 18 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 17 |
| Nearside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 14 |
| Offside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 14 |
| Rear reflector on motorcycle missing |1.4.1| | 14 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 13 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 12 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 12 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 12 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 12 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 12 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 12 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 11 |
| Throttle operating incorrectly |6.2.1f| | 10 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 10 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 10 |
| Direction indicator incorrect colour |1.5.1b| | 9 |
| Brake hose excessively deteriorated | 8 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 8 |
| Offside Rear Direction indicator not working |1.5.1c| | 8 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 8 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 8 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 8 |
| Riders seat insecure |6.2.1a| | 8 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 7 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 7 |
| Rear Brake locking device missing |3.2.A1e| | 7 |
| Stop lamp remains on when the brake is released |1.3.1e| | 6 |
| Headlamp insecure |1.2.3b| | 6 |
| Horn not working |1.7.3a| | 6 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 6 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 6 |
| Offside Front Footrest insecure |6.2.1a| | 6 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 6 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 6 |
| Registration plate lamp issues | 6 |
| Headlamp switch faulty |1.2.4| | 5 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 5 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| Drive chain excessively tight |6.2.1d| | 5 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Front Steering headbearing has excessive free play |2.2.2| | 5 |
| 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| | 5 |
| Headlamp aim not tested |1.6| | 5 |
| Nearside Rear Direction indicators not working |1.5.1c| | 5 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 4 |
| Headlamp aim not tested (4.1.2 (b)) | 4 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Indicator switch insecure |1.5.4| | 4 |
| Rear Drive chain excessively loose |6.2.1d| | 4 |
| Headlamp switch insecure |1.2.4| | 4 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 4 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 4 |
| Nearside Rear suspension bush has excessive free play |2.4.A2a|i|| | 4 |
| Offside Rear suspension bush has excessive free play |2.4.A2a|i|| | 4 |
| Front Footrest insecure |6.2.1a| | 4 |
| Front Direction indicator incorrect colour |1.5.1b| | 4 |
| Rear Direction indicator incorrect colour |1.5.1b| | 4 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 4 |
| Brake lever cannot be applied smoothly |3.1.3d| | 3 |
| Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 3 |
| Front mudguard insecure |2.3.7| | 3 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 3 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Nearside Rear Footrest insecure |6.2.1a| | 3 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Nearside Rear Footrest missing |6.2.1a| | 3 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 3 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Indicator switch defective |1.5.4| | 3 |
| Brake pedal insecure |3.1.2a| | 3 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 3 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 3 |
| Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 3 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 3 |
| 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)) | 3 |
| Position lamp switch insecure |1.1.4b| | 3 |
| Offside Footrest insecure |6.2.1a| | 3 |
| Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 2 |
| Offside Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 2 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Front Position lamp not working (4.2.1 (a)) | 2 |
| Fuel tank leaking |7.2.1a| | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Offside Rear Exhaust excessively deteriorated |7.1.1a| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Riders seat insecure |6.2.1a| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Fuel cap sealing washer missing |7.2.2c| | 2 |
| Offside Rear Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Nearside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 2 |
| Rear Suspension arm pin or bush excessively worn |5.3.4 |a| |i|| | 2 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 2 |
| Exhaust has part of the system missing |7.1.1a| | 2 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 2 |
| Brake reaction bracket insecure |3.2.A1j| | 2 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 2 |
| Front Direction indicator not working |1.5.1c| | 2 |
| Rear Direction indicator not working |1.5.1c| | 2 |
| Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 2 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 2 |
| Rear suspension component loose |2.4.A.1a| | 2 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Rear Direction indicators not working |1.5.1c| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| All direction indicators not working (4.4.1 (a) (ii)) | 2 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 2 |
| Nearside Rear wheel rotation likely to be impeded |6.2.1b| | 2 |
| Fuel system component insecure |7.2.1b| | 2 |
| Front position lamp incorrect colour |1.1.2a| | 2 |
| Front position lamp missing |1.1.1a| | 2 |
| Rear Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 2 |
| Offside Front Direction indicators not working |1.5.1c| | 2 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Handlebar mounting clamp loose |2.1.1a| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Nearside Footrest insecure |6.2.1a| | 2 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 2 |