| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 18 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Registration plate issues | 7 |
| Registration plate lamp issues | 4 |
| Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear reflector on motorcycle missing |1.4.1| | 3 |
| 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| | 3 |
| Horn not working |1.7.3a| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Brake hose damaged | 3 |
| Nearside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Fuel hose leaking |7.2.1a| | 2 |
| Front brake disc in such a condition that it is seriously weakened | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Rear parking brake recording little or no effort | 2 |
| Parking brake: efficiency below requirements |3.7.B.7| | 2 |
| Centre Fuel system component leaking |7.2.1a| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Offside Rear wheel bearing has excessive play |2.6.2| | 2 |
| Rear reflector missing |1.5.1a| | 2 |
| Stop lamp not working |1.2.1b| | 2 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Front Brake lever attachment screws loose |3.1.2b| | 1 |
| Nearside Rear Rear position lamp|s| excessively deteriorated so that it is not visible from a reasonable distance |1.1.A.3d| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Rear Seat insecure |6.2.1a| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Nearside Steering operation restricted in free movement from lock to lock |2.1.4 |c|| | 1 |
| Parking brake efficiency below requirements |3.7.B.7| | 1 |
| Offside Rear Brake cable has wires broken and is significantly weakened |3.5.1b| | 1 |
| Parking brake is not capable of being maintained in operation by direct mechanical action only |3.1.2| | 1 |
| Brake pedal has insufficient reserve movement |3.3.A.5| | 1 |
| Offside Rear fog lamp missing |1.3.2a| | 1 |
| Rear fog lamp switch missing |1.3.1a| | 1 |
| Rear fog lamp tell tale not working |1.3.1b| | 1 |
| Nearside Exhaust has a major leak of exhaust gases |7.1.2| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Nearside Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Centre Headlamp insecure |1.2.3b| | 1 |
| Centre Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Nearside Brake linkage excessively corroded |3.2.A1c| | 1 |
| Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Brake pedal cannot be applied smoothly Rear brake pedal not adjusted correctly |3.1.3d| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Stop lamp not working hand opperation (4.3.1 (a) (ii)) | 1 |
| Nearside Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear All position lamps not working |4.2.1 |a|| | 1 |
| Centre Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Stop lamp does not illuminate immediately a brake applies front |1.3.1a| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Fuel tank leaking |7.2.1a| | 1 |
| Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Direction indicator obviously incorrectly positioned Rear indicators too close together.
Mandatory direction indicators must have minimum separation distances between the illuminating surfaces of:
solo motorcycles ??? 240mm at the front and 180mm at the rear |4.4.3 |a|| | 1 |
| Position lamp adversely affected by the operation of another lamp Rear light affected by indicator. |4.2.3 |b|| | 1 |
| Stop lamp adversely affected by the operation of another lamp Affected by indicators |4.3.3 |b|| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Offside Exhaust system insecure (6.1.2 (a)) | 1 |
| Offside Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Rear Brake lever has restricted free movement (1.1.15 (e)) | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| 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 |
| Rear Brake pedal creeps down when held under pressure |3.3.B.1a| | 1 |
| Exhaust noise is clearly in excess of that emitted by a similar vehicle fitted with a standard silencer in average condition |7.1.4| | 1 |
| Offside Brake reaction bracket insecure |3.2.A1j| | 1 |
| Nearside Tie bar/rod has excessive play in a pin/bush |2.4.G.2| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Rear Brake reaction bracket insecure locking pin missing |3.2.A1j| | 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 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |