| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 11 |
| Steering headbearing has excessive free play |2.2.2| | 9 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 8 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Parking brake: efficiency below requirements |3.7.B.7| | 5 |
| Fuel system component leaking |7.2.1a| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Horn not working |1.6.2a| | 4 |
| Horn not working |1.7.3a| | 3 |
| Rear parking brake recording little or no effort | 3 |
| Parking brake lever has no reserve travel |3.1.6b| | 3 |
| Rear brake application uneven | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Front Brake cable badly frayed |3.2.A1b| | 2 |
| Front Brake cable has a significantly damaged outer casing. |3.2.A1b| | 2 |
| Front suspension assembly component loose |2.3.1| | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Registration plate lamp issues | 2 |
| Mechanical brake component has restricted free movement | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Nearside Rear Stop lamp not working |1.2.1b| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Headlamp switch faulty |1.2.4| | 2 |
| Nearside Front Ball joint has excessive play |2.2.B.1f| | 2 |
| Nearside Front Front position lamp|s| not working |1.1.A.3b| | 2 |
| Offside Front Front position lamp|s| not working |1.1.A.3b| | 2 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 2 |
| Offside Footrest insecure |6.2.1a| | 2 |
| Nearside Footrest insecure |6.2.1a| | 2 |
| Offside Front Front wheel bearing has excessive play |2.5.A.3c| | 2 |
| Offside Rear rear brake recording little or no effort |3.7.B.5a| | 2 |
| Steering column movement between the shaft and steering wheel |2.1.2b| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Offside Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Front Brake lever mounting insecure |3.1.2a| | 1 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Centre Rear Upper Rear position lamp insecure |1.1.1c| | 1 |
| Drive chain excessively loose |6.2.1d| | 1 |
| Rear Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Offside Front Anti-roll bar attachment bracket/mounting insecure |2.4.G.1| | 1 |
| Nearside rear brake recording little or no effort |3.7.B.5a| | 1 |
| Nearside Front Upper Suspension arm locating pin locking device missing |2.4.G.3b| | 1 |
| Rear Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front Brake cable knotted |3.2.A1b| | 1 |
| Rear Wheel fixing loose (single fixing) (5.2.1 (a) (ii)) | 1 |
| Steering column top bearing excessively worn |2.1.2c| | 1 |
| Nearside Drag link end ball joint has excessive play |2.2.B.1f| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Fuel system component leaking both carburettors (6.1.3 (b) (i)) | 1 |
| Front Direction indicator incorrect colour (4.4.3 (a)) | 1 |
| Nearside Rear Service brake lagging in operation (1.2.1 (d)) | 1 |
| Brake pipe inadequately clipped |3.6.B.1| | 1 |
| Nearside Body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2| | 1 |
| Nearside Windscreen wiper blade missing |8.2.2| | 1 |
| Steering wheel retaining device insecure |2.1.6| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Braking system leaking |3.6.A.1| | 1 |
| Centre Rear Upper Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front Handlebar mounting clamp loose |2.1.1a| | 1 |
| Front Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Nearside Rear Brake lever attachment screws loose |3.1.2b| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Fuel hose leaking |7.2.1a| | 1 |
| Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Wheel spoke excessively corroded |4.2.1b| | 1 |
| Rear Wheel spoke excessively corroded |4.2.1b| | 1 |
| Brake lever excessively corroded |3.2.A1c| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Front Fuel system component insecure |7.2.1b| | 1 |
| Stop lamp not working |1.2.1b| | 1 |
| Fuel pipe leaking |7.2.3| | 1 |
| Rear Wheel spoke excessively loose x2 |5.2.2 |d|| | 1 |
| Nearside Rear Road wheel spoke cracked |4.2.A.1b| | 1 |
| Fuel system component leaking |7.2.3| | 1 |
| Front Anti-roll bar missing |2.4.G.1| | 1 |
| Suspension arm has excessive play in a pin/bearing |2.4.G.2| | 1 |
| Offside Front wheel bearing has excessive play |2.5.A.3c| | 1 |
| Rear Wheel spoke cracked. |4.2.1b| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Front Throttle operating incorrectly |6.2.1f| | 1 |
| Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Nearside Rear position lamp|s| excessively deteriorated so that it is not visible from a reasonable distance |1.1.A.3d| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Nearside Steering rack gaiter split |2.2.D.2d| | 1 |
| Stop lamp adversely affected by the operation of another lamp |1.2.1f| | 1 |
| Windscreen washer control missing |8.2.1a| | 1 |
| Exhaust has a major leak of exhaust gases |7.1.2| | 1 |
| Offside Front Ball joint has excessive play |2.2.B.1f| | 1 |
| Nearside Front Track rod end ball pin shank loose |2.2.B.1c| | 1 |
| Offside Rear Rear wheel bearing has excessive play |2.6.2| | 1 |
| Nearside Rear Front position lamp|s| not working |1.1.A.3b| | 1 |
| Offside Rear Front position lamp|s| not working |1.1.A.3b| | 1 |
| Nearside Front Track rod end ball joint has excessive play |2.2.B.1f| | 1 |
| Offside Front Track rod end ball joint has excessive play |2.2.B.1f| | 1 |
| Nearside Inner Body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2| | 1 |
| Offside Inner Body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2| | 1 |
| Nearside Front Brake hose twisted |found during steering lock to lock check| |2.2.D.2b| | 1 |
| Nearside Front Body or chassis has an unsatisfactory modification, seriously affecting its strength within 30cm of the body mountings |6.1.B.2| | 1 |
| Rear Body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2| | 1 |
| Nearside Seat belt anchorage prescribed area is excessively corroded |5.2.6| | 1 |
| Offside Seat belt anchorage prescribed area is excessively corroded |5.2.6| | 1 |
| Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Front Footrest insecure |6.2.1a| | 1 |
| Front Lower Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Brake pedal is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Brake lever attachment screws loose |3.1.2b| | 1 |
| Nearside Front Handlebar handgrip missing |2.1.1c| | 1 |
| Offside Front Handlebar handgrip missing |2.1.1c| | 1 |
| Nearside Front Steering lock stop ineffective |2.1.3| | 1 |
| Offside Front Steering lock stop ineffective |2.1.3| | 1 |
| Nearside Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Offside Rear Lower Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Front Windscreen wiper not operating automatically when switched on |8.2.1b| | 1 |
| Steering wheel locking device insecure |2.1.6| | 1 |
| Steering column top mounting bracket insecure |2.1.2d| | 1 |
| Parking brake lever, pawl mechanism pivots or their associated mountings are insecure |3.1.4b| | 1 |
| Parking brake lever defective so that it cannot be satisfactorily operated |3.1.3c| | 1 |
| Headlamp switch faulty |1.7.1| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |