| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 26 |
| Rear reflector on motorcycle missing |1.4.1| | 17 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 6 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Drive chain excessively tight |6.2.1d| | 6 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 5 |
| Horn not working |1.7.3a| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Registration plate issues | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Nearside Rear Footrest missing |6.2.1a| | 3 |
| Drive chain excessively loose |6.2.1d| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| 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 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Rear Brake locking device missing |3.2.A1e| | 2 |
| Offside Steering lock stop ineffective |2.1.3| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 1 |
| Offside Rear Footrest missing (6.2.12 (a)) | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Brake hose fouling |3.2.B3b| | 1 |
| Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Position lamp switch insecure |1.1.4b| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Horn missing |1.7.1| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Nearside Handlebar deformed |2.1.1b| | 1 |
| Brake lever mounting cracked |3.1.2c| | 1 |
| Rear Rear suspension component loose |2.4.A.1a| | 1 |
| Rear Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front wheel insecure |4.2.3b| | 1 |
| Rear Rear wheel insecure |4.2.3b| | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Offside Rear Footrest insecure (6.2.12 (a)) | 1 |
| Front suspension assembly component loose Lower yoke pinch bolts. (2.3.1) | 1 |
| Throttle operating incorrectly (6.2.1f) | 1 |
| Steering headbearing has excessive free play (2.2.2) | 1 |
| Handlebar mounting clamp bolt loose Both sides. (2.1.1a) | 1 |
| Front Brake master cylinder insecurely mounted (3.2.B1a) | 1 |
| Rear shock absorber insecurely mounted (2.4.A.3b) | 1 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Offside Rear Upper Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Nearside Front Direction indicator missing |1.5.1a| | 1 |
| Offside Front Direction indicator missing |1.5.1a| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Steering lock stop ineffective |2.1.3| | 1 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Front suspension assembly component missing Wheel spindle pinchbolt. |2.3.1| | 1 |
| Front suspension assembly component loose Top yoke nut. |2.3.1| | 1 |
| Brake locking device missing Rear brake torque arm securing nut. |3.2.A1e| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Offside Handlebar mounting clamp loose |2.1.1a| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front suspension assembly component loose |2.3.1| | 1 |
| Handlebar handgrip not secure to handlebars. both |2.1.1c| | 1 |
| Offside Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |