| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 32 |
| Drive chain excessively loose |6.2.1d| | 8 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 7 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 7 |
| Horn not working |1.7.3a| | 7 |
| Drive chain worn to excess |6.2.1e| | 6 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Steering headbearing has excessive free play |2.2.2| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Registration plate issues | 5 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 3 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Headlamp insecure (4.1.1 (c)) | 2 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Offside Rear Direction indicator insecure |1.5.3b| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Direction indicator not working |1.5.1c| | 2 |
| Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Offside Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Nearside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front Brake caliper inadequately mounted |1.1.16 |c| |i|| | 1 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Front Brake performance not tested |1.2.1 |g|| | 1 |
| Centre Front Lower Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Centre Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Offside Handlebar grip insecure to handlebar throttle assy insecure (2.2.1 (d) (ii)) | 1 |
| Offside Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Front Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Front wheel spindle securing nut locking device insecure |2.3.3a| | 1 |
| Front wheel spindle loose |2.3.3a| | 1 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Drive chain excessively tight |6.2.1d| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Front Brake performance not tested (1.2.1 (g)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Nearside Front Suspension component pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Offside Front Suspension component pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Fuel system component leaking overflow pipes (6.1.3 (b) (i)) | 1 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Brake component has an inadequate repair |3.1.5| | 1 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Stop lamp does not illuminate immediately a brake applies when front brake lever applied |1.3.1a| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Front position lamp missing |1.1.1a| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Brake fluid reservoir severely damaged |3.2.B1b| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Rear Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Nearside Rear Drive chain excessively tight |6.2.1d| | 1 |
| Centre Rear Rear position lamp deteriorated and function impaired No e mark on lamp |1.1.1b| | 1 |
| Offside Front Throttle operating incorrectly throttle sticking on full throtlle (6.2.7 (a) (i)) | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Nearside Front Wheel fixing missing |single fixing| split pin |5.2.1 |a| |ii|| | 1 |
| Offside Fuel system component leaking |7.2.1a| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Upper Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Rear Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Brake pedal is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Front Horn control not functioning. |1.7.2b| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Offside Rear Brake locking device missing |3.2.A1e| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Front Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Nearside Front Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Nearside Handlebar handgrip missing |2.1.1c| | 1 |
| Steering lock stop maladjusted |2.1.3| | 1 |