| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 31 |
| Drive chain excessively loose |6.2.1d| | 17 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 9 |
| Registration plate issues | 9 |
| Drive chain worn to excess |6.2.1e| | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Horn not working |1.7.3a| | 7 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 7 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 6 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Exhaust excessively deteriorated |7.1.1a| | 4 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Registration plate lamp issues | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Rear Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Wheel spoke cracked. |4.2.1b| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Brake pedal cannot be released smoothly |3.1.3d| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Brake pedal pivots excessively worn |3.1.3a| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Rear Drive chain excessively loose |6.2.1d| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Rear Wheel spoke excessively corroded |4.2.1b| | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Central Motorcycle structure joining/attachment plate or fastening insecure top engine mount loose (6.1.1 (b) (i)) | 1 |
| Offside Steering lock stop missing |2.1.3| | 1 |
| Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Nearside Front Lower Brake excessively binding |1.2.1 |f|| | 1 |
| Central Front Upper Position lamp not working |4.2.1 |a|| | 1 |
| Central Rear Lower Position lamp not working |4.2.1 |a|| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Brake pedal is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 1 |
| Rear Brake component insecure reaction bracket |1.1.21 |c|| | 1 |
| Nearside Rear Footrest missing |6.2.12 |a|| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Brake pedal is bent and the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Rear Brake pedal not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 1 |
| Rear Drive chain sprocket excessively loose (6.1.7 (c) (i)) | 1 |
| Rear Brake grabbing severely (1.2.1 (c)) | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Central Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Nearside Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front An item not tested |Manual| | 1 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Centre Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Stop lamp remains on when the brake is released Front brake light switch broken and held on with tape |1.3.1e| | 1 |
| Offside Front Direction indicator missing |1.5.1a| | 1 |
| Offside Rear Direction indicator missing |1.5.1a| | 1 |
| Nearside Front Direction indicator missing |1.5.1a| | 1 |
| Nearside Rear Direction indicator missing |1.5.1a| | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Position lamp not working (4.2.1 (a)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Nearside Front Brake excessively binding (1.2.1 (f)) | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Fuel tank insecure (6.1.3 (a) (i)) | 1 |
| Direction indicator not working ALL
|1.5.1c| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Stop lamp does not illuminate immediately a brake applies footbrake |1.3.1a| | 1 |
| Fuel pipe union leaking |7.2.1a| | 1 |
| Rear Front mudguard insecure |2.3.7| | 1 |
| Front Upper Handlebar mounting clamp loose |2.1.1a| | 1 |
| Rear Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 1 |
| Fuel cap ineffective fuel cap seal insecure and not attached to the cap |6.1.3 |b| |i|| | 1 |
| Rear reflector on motorcycle obscured |1.4.2b| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Nearside Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Seat insecure back rest |6.2.1a| | 1 |
| Front suspension assembly component excessively bent |2.3.1| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Lower Engine mounting/bracket missing (6.1.8 (a) (ii)) | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride rear brake anchor arm split pin missing |6.2.1h| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Front Dipswitch does not operate immediately when selected on dipped beam |4.1.3 |b|| | 1 |
| Front All position lamps not working |4.2.1 |a|| | 1 |
| Front Wheel bearing so rough it is likely to overheat or break up |5.1.3 |b| |ii|| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Central Fuel system component leaking |6.1.3 |b| |i|| | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Rear Brake component inadequately mounted bolt missing from brake arm (1.1.21 (c)) | 1 |
| Front Stop lamp not working wire off (4.3.1 (a) (ii)) | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front position lamp missing |1.1.1a| | 1 |
| Rear Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |