| Most common failures | No# failures |
|---|
| Registration plate issues | 26 |
| Headlamp aim out of alignment | 19 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 15 |
| Rear reflector on motorcycle missing |1.4.1| | 10 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 7 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 7 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Horn not working |1.7.3a| | 5 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 5 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Drive chain excessively tight |6.2.1d| | 4 |
| Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Front position lamp incorrect colour |1.1.2a| | 2 |
| Fuel system component leaking |7.2.1a| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Direction indicator missing |1.5.1a| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Rear Brake disc|s| cracked |3.2.A1g| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Rear All position lamps adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Drive chain excessively loose |6.2.1d| | 2 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Rear Position lamp not working |4.2.1 |a|| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Front suspension assembly component excessively misaligned |2.3.1| | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Registration plate lamp issues | 2 |
| Rear Shock absorber has an excessively worn bush (5.3.2 (c)) | 2 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Front Brake component is severely distorted |3.1.5| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Rear Brake disc|s| securing bolt|s| missing |3.2.A1g| | 1 |
| Front Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| 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| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Upper Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Wheel spoke excessively loose |5.2.2 |d|| | 1 |
| Front Wheel fractured significantly reducing the original strength |4.2.1a| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Nearside Front Upper Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Front Upper Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Rear Upper Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Rear Upper Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Stop lamp does not illuminate immediately a brake applies when rear light is turned on. |1.3.1a| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies when rear light is turned on . |1.3.1a| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Fuel system component leaking leaking carb |7.2.1a| | 1 |
| Front All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Throttle operating incorrectly |6.2.7 |a| |i|| | 1 |
| Throttle operating incorrectly sticks open |6.2.1f| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Front Brake disc|s| excessively pitted |3.2.A1l| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Rear wheel has a loose wheel bolt|s| |4.2.3a| | 1 |
| Front wheel has a loose wheel bolt|s| |4.2.3a| | 1 |
| Front wheel spindle securing nut locking device insecure |2.3.3a| | 1 |
| Brake locking device insecure |3.2.A1e| | 1 |
| Rear Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| All position lamps adversely affected by the operation of the horn |1.1.3b| | 1 |
| Centre Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Centre Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Rear Direction indicator missing |1.5.1a| | 1 |
| Offside Rear Direction indicator missing |1.5.1a| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Brake performance not tested |3.3| | 1 |
| Rear An item not tested |Manual| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Horn missing |1.7.1| | 1 |
| Horn replaced by a bell |1.7.3b| | 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 |
| Nearside Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Offside Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Rear Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Centre Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Stop lamp missing |1.3.3a| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 1 |
| Front Brake lever insecure adjuster loose |1.1.2 |e| |i|| | 1 |
| Position lamp not working Flashing . (4.2.1 (a)) | 1 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Brake excessively binding (1.2.1 (f)) | 1 |
| Nearside Front Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Offside Front Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Central Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Rear Wheel spoke excessively loose (5.2.2 (d)) | 1 |
| Fuel tank insecure (6.1.3 (a) (i)) | 1 |
| Nearside Rear Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Fuel system component leaking excessively or a risk of fire (6.1.3 (b) (ii)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Front Motorcycle structure modified such that structural rigidity is significantly reduced Head light mounting bracket inadequatly secure (6.1.1 (d) (i)) | 1 |