| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 25 |
| Rear reflector on motorcycle missing |1.4.1| | 16 |
| Registration plate issues | 14 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Drive chain excessively loose |6.2.1d| | 5 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Horn not working |1.7.3a| | 5 |
| Stop lamp remains on when the brakes are released | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Rear reflector missing |4.8.2 |a| |ii|| | 3 |
| Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Offside Rear Direction indicators not working |1.5.1c| | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Horn missing |1.7.1| | 3 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 2 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Offside Direction indicators flashing more than 120 times a minute |1.4.A.2g| | 1 |
| Parking brake: efficiency below requirements |3.7.C.1b| | 1 |
| Parking brake efficiency below requirements |3.7.C.1b| | 1 |
| Registration plate lamp issues | 1 |
| Rear Chain guard insecure (6.1.7 (i)) | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Headlamp light source and lamp not compatible |4.1.4 |c|| | 1 |
| Central Front Upper Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Central Front Upper Stop lamp does not illuminate immediately a brake applies brake light switch faulty |1.3.1a| | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Rear Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Upper Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Throttle operating incorrectly Not returning correctly |6.2.1f| | 1 |
| Brake performance not tested |1.2.1 |g|| | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Steering operation restricted in free movement from lock to lock catching loose wiring on left lock and wires shorting out (2.1.4 (c)) | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Rear Brake caliper insecurely mounted and braking performance affected (1.1.16 (c) (ii)) | 1 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 1 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Chain guard fouling another component |6.2.1c| | 1 |
| Centre Fuel system component leaking |7.2.1a| | 1 |
| Front wheel spindle loose |2.3.5a| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Nearside Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Central Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Nearside Front Footrest insecure peg is bent |6.2.1a| | 1 |
| Nearside Front Upper Horn control not readily accesible. |1.7.2a| | 1 |
| Offside Rear Lower Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Nearside Rear Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Offside Rear Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Offside Front Brake caliper|s| insecure |3.2.A1j| | 1 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Headlamp aim not tested |4.1.2 |b|| | 1 |
| Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Direction indicator missing |1.5.1a| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Horn not working (7.7 (a)) | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Braking system does not have an approriate system/s fitted according to its age rear master cylinder missing |3.1.1| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Stop lamp remains on when the brake is released ADJUSTED DURING TEST |1.3.1e| | 1 |
| Nearside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Position lamp likely to become detached (4.2.1 (c) (ii)) | 1 |
| Nearside Rear Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Offside Rear Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Direction indicator missing All indicators missing - vehicle is primarily ON road use |1.5.1a| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Central Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |