| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 62 |
| Drive chain excessively loose |6.2.1d| | 32 |
| Registration plate issues | 26 |
| Rear reflector on motorcycle missing |1.4.1| | 19 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 19 |
| Steering headbearing has excessive free play |2.2.2| | 19 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 16 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 13 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 12 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 12 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 11 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 10 |
| Drive chain worn to excess |6.2.1e| | 10 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 9 |
| Rear Wheel spoke excessively loose |4.2.1b| | 9 |
| Rear reflector on motorcycle obscured |1.4.1| | 8 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Front wheel bearings have excessive free play |2.3.5b| | 8 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 8 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Drive chain excessively tight |6.2.1d| | 6 |
| Headlamp aim beam image kick up to the offside |1.6| | 6 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 6 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 6 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 6 |
| Rear Wheel spoke cracked. |4.2.1b| | 6 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Front Wheel spoke excessively loose |4.2.1b| | 6 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 5 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 5 |
| Rear Drive chain excessively loose |6.2.1d| | 5 |
| Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 4 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 4 |
| Horn not working |1.7.3a| | 4 |
| 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| | 4 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Front suspension has inadequate damping effect. |2.3.6c| | 3 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 3 |
| Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Registration plate lamp issues | 3 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| An item not tested |Manual| | 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 |
| Handlebar deformed |2.1.1b| | 3 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Rear Wheel spoke missing |4.2.1b| | 3 |
| Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Brake pedal insecure |3.1.2a| | 2 |
| Brake pedal cannot be released smoothly |3.1.3d| | 2 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 2 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 2 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Fuel system component leaking |7.2.1a| | 2 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Brake pedal pivots excessively worn |3.1.3a| | 2 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 2 |
| Brake locking device missing |3.2.A1e| | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 2 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Chain guard insecure |6.2.1c| | 2 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Rear Wheel spoke excessively corroded |4.2.1b| | 2 |