| Most common failures | No# failures |
|---|
| Registration plate issues | 33 |
| Headlamp aim out of alignment | 25 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Rear reflector on motorcycle missing |1.4.1| | 14 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Horn not working |1.7.3a| | 6 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| 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| | 5 |
| Rear reflector missing (4.8.2 (a) (ii)) | 5 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Nearside Direction indicators not working |1.5.1c| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Front Stop lamp missing |1.3.3a| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Nearside Front Lower Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Offside Front Lower Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Drive chain excessively loose |6.2.1d| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Nearside Front Direction indicator missing |1.5.1a| | 2 |
| Offside Front Direction indicator missing |1.5.1a| | 2 |
| Nearside Rear Direction indicator missing |1.5.1a| | 2 |
| Offside Rear Direction indicator missing |1.5.1a| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front Suspension attachment bracket/mounting insecure |5.3.3 |a| |i|| | 1 |
| Rear Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Seat insecure |6.2.1a| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Brake disc|s| cracked |3.2.A1g| | 1 |
| Rear Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Front Direction indicator missing |1.5.1a| | 1 |
| Rear Direction indicator missing |1.5.1a| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Front wheel spindle loose |2.3.5a| | 1 |
| Rear Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front Headlamp dipped beam affected by the operation of the horn |1.2.2c| | 1 |
| Rear Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Offside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Central Front Upper Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Central Rear Lower Rear reflector on motorcycle missing |1.4.1| | 1 |
| Nearside Rear Lower Footrest insecure |6.2.1a| | 1 |
| Central Front Lower Front wheel insecure |4.2.3b| | 1 |
| Nearside Front Upper Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Front Upper Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Front Upper Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Rear Lower Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Rear Lower Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Front Lower Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Offside Rear Lower Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Nearside Rear Lower Rear suspension bush has excessive free play swinging arm bush |2.4.A2a|i|| | 1 |
| Offside Rear Lower Rear suspension bearing has excessive free play swinging arm bush |2.4.A2a|i|| | 1 |
| Offside Front Upper Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Nearside Rear Lower Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Nearside Front Lower Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Offside Front Upper Throttle operating incorrectly |6.2.1f| | 1 |
| Centre Front Lower Horn not working |1.7.3a| | 1 |
| Centre Front Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Rear Rear position lamp incorrect colour |1.1.2b| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Rear wheel spindle loose |2.4.A.2b| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Front Handlebar mounting clamp loose |2.1.1a| | 1 |
| Front Plate brake test indicates a severely juddering brake |3.3.B1b| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Fuel cap sealing washer missing |7.2.2c| | 1 |
| Rear Wheel spoke missing |4.2.1b| | 1 |
| Rear Wheel spoke cracked. |4.2.1b| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Rear Brake hose leaking fluid |3.2.B4| | 1 |
| Offside Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Offside Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride Chain link |6.2.1h| | 1 |
| Brake pedal is inoperative |3.1.3c| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Outer Rear reflector on motorcycle missing |1.4.1| | 1 |
| Outer Rear Footrest missing |6.2.1a| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride split link wrong way round |6.2.1h| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Nearside Direction indicator missing |1.5.1a| | 1 |
| Offside Direction indicator missing |1.5.1a| | 1 |
| Handlebar mounting excessively deteriorated |flexible type| |2.1.1d| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Offside Rear 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 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Drive belt worn to excess (6.1.7 (c) (i)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Headlamp incorrect colour (4.1.4 (a)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition (8.1.1 (a)) | 1 |
| All direction indicators missing (4.4.1 (a) (ii)) | 1 |
| Front Stop lamp not working Front brake (4.3.1 (a) (ii)) | 1 |
| Rear Stop lamp not working Rear brake (4.3.1 (a) (ii)) | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Rear Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 1 |