| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 18 |
| Parking brake: efficiency below requirements |3.7.B.7| | 8 |
| Rear brake binding | 6 |
| Rear parking brake recording little or no effort | 4 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Windscreen wiper does not clear the windscreen effectively | 3 |
| Service brake: efficiency below requirements |3.7.B.7| | 3 |
| Nearside Front position lamp|s| not working |1.1.A.3b| | 3 |
| Horn not working |1.6.2a| | 3 |
| Nearside Rear Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2| | 3 |
| Registration plate lamp issues | 3 |
| Brake pipe excessively corroded | 3 |
| Offside Front wheel bearing has excessive play |2.5.A.3c| | 3 |
| Registration plate issues | 3 |
| Exhaust has a major leak of exhaust gases |7.1.2| | 2 |
| Offside Rear Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2| | 2 |
| Brakes imbalanced across an axle | 2 |
| Horn not loud enough to be heard by another road user |1.6.2b| | 2 |
| Rear brake application uneven | 2 |
| Front brake application uneven | 2 |
| Service brake: efficiency below requirements |3.7.C.1a| | 2 |
| Parking brake: efficiency below requirements |3.7.C.1b| | 2 |
| Offside Headlamp not working on dipped beam |1.7.5a| | 2 |
| Centre Exhaust has a major leak of exhaust gases |7.1.2| | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Offside Stop lamp not working |1.2.1b| | 2 |
| Direction indicators not working |1.4.A.2c| | 2 |
| Offside Rear Body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2| | 2 |
| Nearside Rear Braking system leaking |3.6.A.1| | 2 |
| Nearside Rear position lamp|s| not working |1.1.A.3b| | 2 |
| Nearside Front wheel bearing has excessive play |2.5.A.3c| | 2 |
| Offside Front wheel bearing rough when rotated |2.5.A.2| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Nearside Rear Suspension component mounting prescribed area is excessively corroded |2.4.A.3| | 2 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| Offside Rear position lamp|s| adversely affected by the operation of another lamp |1.1.A.3f| | 2 |
| Nearside Front wheel bearing rough when rotated |2.5.A.2| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Brake hose has insufficient room to move | 2 |
| Headlamp insecure |1.2.3b| | 1 |
| Steering system has excessive free play detected at the steering wheel |steering box fitted| |2.2.A.1a| | 1 |
| Centre Brake pipe inadequately supported |3.6.B.1| | 1 |
| Exhaust emits clearly visible black smoke during acceleration |7.3.A.2c| | 1 |
| Front Exhaust has a major leak of exhaust gases |7.1.2| | 1 |
| Headlamp switch faulty |1.7.1| | 1 |
| Windscreen wiper not operating over a large enough area to give an adequate view |8.2.1c| | 1 |
| Brake pedal creeps down when held under pressure |3.3.B.1a| | 1 |
| Nearside Front Vehicle structure has excessive corrosion which adversely affects braking or steering |6.1.A.1| | 1 |
| Nearside Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2| | 1 |
| Nearside Rear Body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2| | 1 |
| Offside Body has a sharp edge caused by corrosion |6.1.C.1| | 1 |
| Fuel cap/sealing device sealing washer missing |7.2.4c| | 1 |
| Nearside Front Suspension component mounting prescribed area is excessively corroded chassis |2.4.A.3| | 1 |
| Nearside Rear Suspension component mounting prescribed area is excessively corroded chassis |2.4.A.3| | 1 |
| Offside Rear wheel bearing has excessive play |2.6.2| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Front Brake component is fractured |3.1.5| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Nearside Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Nearside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Stop lamp not working |1.2.1b| | 1 |
| Parking brake lever, pawl mechanism pivots or their associated mountings are insecure |3.1.4b| | 1 |
| Offside Front Brake hose bulging under pressure |3.6.B.3| | 1 |
| Exhaust system not adequately supported |7.1.1| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Rear Brake locking device insecure |3.2.A1e| | 1 |
| Fuel system component leaking |7.2.3| | 1 |
| Nearside Rear rear brake recording little or no effort |3.7.B.5a| | 1 |
| Brake pedal anti-slip provision missing |3.3.A.1b| | 1 |
| Offside Obligatory mirror missing |8.1.1| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Nearside Front Front position lamp|s| not working |1.1.A.3b| | 1 |
| Position lamp switch faulty |1.1.A.1| | 1 |
| Offside Rear Braking system leaking |3.6.A.1| | 1 |
| Offside Front Suspension component mounting prescribed area is excessively corroded |2.4.A.3| | 1 |
| Offside Rear Vehicle structure has an unsatisfactory modification, seriously affecting its strength within 30cm of the body mountings |6.1.B.2| | 1 |
| Nearside Front Vehicle structure has an unsatisfactory modification, seriously affecting its strength within 30cm of the body mountings |6.1.B.2| | 1 |
| Offside Front Vehicle structure has an unsatisfactory modification, seriously affecting its strength within 30cm of the body mountings |6.1.B.2| | 1 |
| Nearside Front Vehicle structure has an inadequate repair, seriously affecting its strength within 30cm of the body mountings |6.1.B.2| | 1 |
| Nearside Headlamp not working on main beam |1.7.5a| | 1 |
| Offside Headlamp not working on main beam |1.7.5a| | 1 |
| Steering column shaft has excessive end float |2.1.3| | 1 |
| Nearside Headlamp not working on dipped beam |1.7.5a| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Direction indicator missing |1.5.1a| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Horn not working |1.7.3a| | 1 |
| Nearside Seat belt insecurely fixed to the vehicles structure |5.2.1a| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.4.A.2f| | 1 |
| Offside Rear Direction indicator incorrect colour |1.4.A.2f| | 1 |
| Steering retaining device missing |2.2.C.1g| | 1 |
| Nearside Front Shock absorber has a serious fluid leak |2.7.3| | 1 |
| Nearside rear brake recording little or no effort |3.7.B.5a| | 1 |
| Steering system has excessive free play detected at the steering wheel |steering rack fitted| |2.2.A.1b| | 1 |
| Parking brake lever defective so that it cannot be satisfactorily operated |3.1.3c| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Stop lamp affected by the operation of the horn |1.3.2| | 1 |
| Offside Front Steering rack gaiter split |2.2.D.2d| | 1 |
| Offside Front Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2| | 1 |
| Offside Front Track rod end ball joint has excessive play |2.2.B.1f| | 1 |
| Offside Rear wheel cylinder securing device missing |3.5.1j| | 1 |
| Rear Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Rear Brake hose leaking |3.6.A.1| | 1 |
| Offside Front Upper Suspension arm has excessive play in a ball joint |2.4.G.2| | 1 |
| Nearside Windscreen wiper not operating automatically when switched on |8.2.1b| | 1 |
| Offside Windscreen wiper not operating automatically when switched on |8.2.1b| | 1 |
| Rear rear brake recording little or no effort |3.7.B.5a| | 1 |
| Steering column locking device missing |2.1.6| | 1 |
| Nearside Rear Rear wheel bearing has excessive play |2.6.2| | 1 |
| Nearside Front Upper Suspension arm attachment bracket/mounting insecure |2.4.G.1| | 1 |
| Brake performance not tested |3.7.A.1| | 1 |
| Offside Rear Brake hose leaking |3.6.A.1| | 1 |
| Offside Front Suspension arm has excessive play in a pin/bush |2.4.G.2| | 1 |
| Bonnet retaining device excessively deteriorated |8.4.2| | 1 |
| Steering rack insecure |2.2.B.1a| | 1 |
| Parking brake lever has no reserve travel |3.1.6b| | 1 |
| Brake linkage locking device insecure |3.5.1l| | 1 |
| Nearside Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Offside Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Front mudguard insecure |2.3.7| | 1 |
| Rear Riders seat insecure |6.2.1a| | 1 |
| Front Upper Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Front suspension assembly component loose |2.3.1| | 1 |
| Chain guard fouling another component |6.2.1c| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Handlebar mounting clamp bolt missing |2.1.1a| | 1 |
| Drive chain excessively loose |6.2.1d| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Nearside Steering lock stop maladjusted |2.1.3| | 1 |
| Offside Steering lock stop maladjusted |2.1.3| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Offside Front position lamp|s| not working |1.1.A.3b| | 1 |
| Offside Rear position lamp|s| not working |1.1.A.3b| | 1 |