| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 15 |
| Drive chain excessively loose |6.2.1d| | 8 |
| Rear reflector on motorcycle missing |1.4.1| | 7 |
| Front wheel bearings have excessive free play |2.3.5b| | 6 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 3 |
| Registration plate lamp issues | 3 |
| Rear reflector on motorcycle obscured |1.4.2b| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Rear Rear suspension movement is excessively stiff |2.4.A.3b| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Registration plate issues | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Horn not working |1.7.3a| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Front Handlebar deformed to the extent that steering is affected (2.2.1 (c) (ii)) | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Handlebar handgrip not secure to handlebars. Throttle and handgrip assembly. |2.1.1c| | 1 |
| Front All position lamps not working |4.2.1 |a|| | 1 |
| Engine mounting/bracket bracket missing |6.1.8 |a| |ii|| | 1 |
| Rear Footrest missing |6.2.12 |a|| | 1 |
| Front Stop lamp missing |4.3.1 |a| |ii|| | 1 |
| Centre Rear Rear reflector on motorcycle obscured |1.4.2b| | 1 |
| Offside Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected |6.2.7 |a| |ii|| | 1 |
| Handlebar grip insecure to handlebar left |2.2.1 |d| |ii|| | 1 |
| Rear Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Position lamp switch insecure |4.2.2 |b|| | 1 |
| Steering operation fouling on the fuel tank or bodywork on full lock |2.1.4 |b|| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 1 |
| Front Brake hose leaking |1.1.12 |c|| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Lower Rear suspension component loose mounting bolt |2.4.A.1a| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 1 |
| Front Throttle operating incorrectly sticking open |6.2.1f| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Headlamp switch insecure |1.2.4| | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Brake hose leaking fluid at mast cyl union |3.2.B4| | 1 |
| Riders seat insecure |6.2.5 |a| |ii|| | 1 |
| Rear Suspension arm pin or bush excessively worn |5.3.4 |a| |i|| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Position lamp switch faulty |1.1.4a| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Front Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride Chain link circlip incorrectly fitted |6.2.1h| | 1 |
| Clutch lever shortened so it cannot be readily operated |6.2.7 |b|| | 1 |
| Front Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Front Brake fluid reservoir leaking hydraulic fluid level glass damaged |3.2.B1e| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front wheel spindle loose |2.3.3a| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Offside Front Direction indicators not working wiring connection in poor condition |1.5.1c| | 1 |
| Nearside Indicator switch insecure |1.5.4| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Nearside Headlamp switch insecure |1.2.4| | 1 |
| Rear Lower Suspension component ball joint excessively worn (5.3.4 (a) (i)) | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Nearside Rear Direction indicator missing |1.5.1a| | 1 |
| Offside Rear Direction indicator missing |1.5.1a| | 1 |
| Decelerometer brake test the less effective brake control does not achieve an efficiency of 25%. |3.3.E1b| | 1 |
| Brake lever is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Decelerometer brake test indicates a severely juddering brake |3.3.E1e| | 1 |
| Central Front Upper Headlamp insecure headlight loose ,bracket broken |1.2.3b| | 1 |
| Central Rear Lower Rear reflector on motorcycle missing reflector missing |1.4.1| | 1 |
| Nearside Rear Upper Direction indicators not working l/hand rear indicator not working |1.5.1c| | 1 |
| Central Front Upper Headlamp incorrect colour headlight white light ,side light yellow white |1.2.1| | 1 |
| Central Rear Lower Roller brake test indicates a severely juddering brake rear brake juddering |3.3.A1b| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Headlamp switch faulty Kills engine |1.2.4| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear suspension component misaligned Dog bone excessively damaged due to fowling |2.4.A.1a| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |