| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 21 |
| Horn not working |1.6.2a| | 13 |
| Windscreen wiper does not clear the windscreen effectively | 9 |
| Registration plate lamp issues | 8 |
| Parking brake: efficiency below requirements |3.7.B.7| | 7 |
| Brakes imbalanced across an axle | 5 |
| Steering headbearing has excessive free play |2.2.2| | 5 |
| Windscreen washer not working | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Offside Rear Direction indicator not working |1.4.A.2c| | 3 |
| Offside Rear Stop lamp not working |1.2.1b| | 3 |
| Offside Front wheel bearing has excessive play |2.5.A.3c| | 3 |
| Nearside Stop lamp not working |1.2.1b| | 3 |
| Offside Track rod end ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt |2.2.C.1c| | 2 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Offside Direction indicators not working |1.4.A.2c| | 2 |
| Nearside Front Front position lamp|s| incorrect colour |1.1.A.3e| | 2 |
| Offside Front Front position lamp|s| incorrect colour |1.1.A.3e| | 2 |
| Rear parking brake recording little or no effort | 2 |
| Rear brake binding | 2 |
| Offside Rear wheel bearing has excessive play |2.6.2| | 2 |
| Hazard warning lamps inoperative |1.4.B.1b| | 2 |
| Nearside Rear Wheel insecure |4.2.A.1c| | 2 |
| Offside Stop lamp not working |1.2.1b| | 2 |
| Horn not working |1.7.3a| | 2 |
| Rear Exhaust system not adequately supported |7.1.1| | 2 |
| Nearside Front Headlamp not working on main beam |1.7.5a| | 2 |
| Offside Front Headlamp not working on main beam |1.7.5a| | 2 |
| Registration plate issues | 2 |
| Nearside Rear position lamp|s| adversely affected by the operation of another lamp |1.1.A.3f| | 2 |
| Fuel system component leaking |7.2.3| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Offside Rear position lamp|s| adversely affected by the operation of another lamp |1.1.A.3f| | 2 |
| Service brake: efficiency below requirements |3.7.B.7| | 2 |
| Driver`s seat insecure |6.2.A.1| | 2 |
| Hazard warning switch faulty |1.4.B.1d| | 2 |
| Stop lamp not working |1.2.1b| | 2 |
| Battery insecure |1.9.1| | 2 |
| Nearside Track rod end ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt |2.2.C.1c| | 2 |
| Parking brake lever has no reserve travel |3.1.6b| | 2 |
| Nearside Front wheel bearing has excessive play |2.5.A.3c| | 1 |
| Nearside Rear wheel bearing has excessive play |2.6.2| | 1 |
| Nearside Rear Stop lamp not working |1.2.1b| | 1 |
| Nearside Rear Rear wheel bearing has excessive play |2.6.2| | 1 |
| Offside Front Rear wheel bearing has excessive play |2.6.2| | 1 |
| Nearside Front Direction indicator incorrect colour |1.4.A.2f| | 1 |
| Offside Front Direction indicator incorrect colour |1.4.A.2f| | 1 |
| Offside rear brake recording little or no effort |3.7.B.5a| | 1 |
| Semaphore indicator switch insecure |1.4.C.1c| | 1 |
| Nearside Front Upper Suspension arm rubber bush deteriorated resulting in excessive movement |2.4.G.2| | 1 |
| Indicator switch insecure |1.4.A.1| | 1 |
| Nearside Front Statutory seat belt missing |5.1.1| | 1 |
| Offside Front Statutory seat belt of the wrong type. |5.1.1| | 1 |
| Dipswitch operation does not deflect all main beam headlamps to make them dipped beams |1.7.4b| | 1 |
| Offside Rear Rear wheel bearing has excessive play |2.6.2| | 1 |
| Horn not loud enough to be heard by another road user |1.6.2b| | 1 |
| Nearside Rear position lamp|s| not working |1.1.A.3b| | 1 |
| Offside front brake binding |3.7.B.1| | 1 |
| Offside Front Lower Suspension arm has excessive play in a pin/bush |2.4.G.2| | 1 |
| Offside Front Road wheel fitment excessively worn between the wheel and hub spigot mounting. |4.2.B.5| | 1 |
| Lower Steering column universal joint insecure |2.1.5| | 1 |
| Steering column movement between the shaft and steering wheel |2.1.2b| | 1 |
| Nearside Front Wheel insecure |4.2.A.1c| | 1 |
| Offside Front front brake binding |3.7.B.1| | 1 |
| Indicator tell tale inoperative |1.4.A.2a| | 1 |
| Nearside Front Track rod end ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt |2.2.C.1c| | 1 |
| Rear brake application uneven | 1 |
| Front Position lamp adversely affected by the operation of another lamp |4.2.3 |c|| | 1 |
| Front Brake lever is inoperative |3.1.3c| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Nearside Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Offside Rear position lamp|s| not working |1.1.A.3b| | 1 |
| Exhaust has a major leak of exhaust gases |7.1.2| | 1 |
| Front Anti-roll bar attachment bracket/mounting insecure |2.4.G.1| | 1 |
| Nearside Front Headlamp not working on dipped beam |1.7.5a| | 1 |
| Offside Front Headlamp not working on dipped beam |1.7.5a| | 1 |
| Nearside Front position lamp|s| not working |1.1.A.3b| | 1 |
| Direction indicators flashing less than 60 times a minute |1.4.A.2g| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Offside Front Windscreen washer jets misaligned and not providing sufficient fluid to the windscreen |3.5 |a|| | 1 |
| Nearside Front Headlamp aim projected beam image is obviously incorrect beam image kick up is to the right |4.1.2 |c|| | 1 |
| Offside Front Headlamp aim projected beam image is obviously incorrect beam image kick up is to the right |4.1.2 |c|| | 1 |
| Nearside Front Upper Suspension arm ball joint dust cover no longer prevents the ingress of dirt |5.3.4 |b| |ii|| | 1 |
| Offside Rear Brake pipe excessively damaged kinked at union to clyinder |1.1.11 |c|| | 1 |
| Nearside Front Lower Suspension arm pin or bush excessively worn inner bushes |5.3.4 |a| |i|| | 1 |
| Offside Front position lamp|s| not working |1.1.A.3b| | 1 |
| Nearside Steering locking device missing |2.2.C.1g| | 1 |
| Offside Steering locking device missing |2.2.C.1g| | 1 |
| Upper Steering column cracked and unserviceable |2.2.C.1d| | 1 |
| Offside Front Front position lamp|s| not working |1.1.A.3b| | 1 |
| Front Wheel insecure |4.2.A.1c| | 1 |
| Nearside Headlamps matched pair are not the same colour |1.7.6| | 1 |
| Nearside Front Braking system leaking |3.6.A.1| | 1 |
| Offside Front Side repeater not working |1.4.A.2c| | 1 |
| Brake hydraulic reservoir fluid level below minimum level |3.6.G.1b| | 1 |
| Nearside Rear Axle swivel joint has excessive movement between a swivel joint and its housing |2.5.A.1b| | 1 |
| Offside Rear Axle swivel joint has excessive movement between a swivel joint and its housing |2.5.A.1b| | 1 |
| Offside Steering rack gaiter split |2.2.D.2d| | 1 |
| Nearside Front Brake pipe kinked |3.6.B.2b| | 1 |
| Front Brake pipe inadequately clipped |3.6.B.1| | 1 |
| Front Brake pipe excessively chafed |3.6.B.2c| | 1 |
| Nearside Front Steering rack gaiter split |2.2.D.2d| | 1 |
| Nearside Front Vehicle structure has a fracture which adversely affects braking or steering |6.1.A.1| | 1 |
| Offside Front Vehicle structure has a fracture which adversely affects braking or steering |6.1.A.1| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Headlamp aim headlamp deteriorated and function impaired lens fitted incorrect |1.2.3a| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Brake cable knotted |3.2.A1b| | 1 |
| Front Brake lever is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Fuel tank leaking |7.2.1a| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Rear Exhaust mounting missing |7.1.1c| | 1 |
| Front Rear suspension bearing has excessive free play swinging arm bearing loose |2.4.A2a|i|| | 1 |
| Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Rear Stop lamp excessively damaged so that it is not visible from a reasonable distance |1.2.1d| | 1 |
| Offside Front Upper Suspension arm rubber mounting deteriorated resulting in excessive movement |2.4.G.2| | 1 |
| Offside Front Lower Suspension arm synthetic mounting deteriorated resulting in excessive movement |2.4.G.2| | 1 |
| Nearside Front Lower Suspension arm synthetic mounting deteriorated resulting in excessive movement |2.4.G.2| | 1 |
| Nearside Front Lower Torsion bar cracked |2.4.E.1a| | 1 |
| Nearside Front Anti-roll bar attachment bracket/mounting insecure |2.4.G.1| | 1 |
| Offside Front Anti-roll bar attachment bracket/mounting insecure |2.4.G.1| | 1 |
| Offside Front Direction indicator not working |1.4.A.2c| | 1 |
| Steering rack insecure |2.2.B.1a| | 1 |
| Nearside Front Suspension component mounting prescribed area is excessively corroded |2.4.A.3| | 1 |
| Offside Front wheel bearing rough when rotated |2.5.A.2| | 1 |
| Offside Rear Direction indicator excessively damaged so that it is not visible from a reasonable distance |1.4.A.2e| | 1 |
| Rear Stop lamp not working |1.2.1b| | 1 |
| Windscreen wiper blade insecure | 1 |
| Nearside Rear Direction indicators not working |1.4.A.2c| | 1 |
| Indicator switch faulty |1.4.A.1| | 1 |
| Front Passenger`s seat insecure |6.2.A.1| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Stop lamp adversely affected by the operation of another lamp both by side lamps |1.2.1f| | 1 |
| Offside Front Shock absorber has a serious fluid leak |2.7.3| | 1 |
| Nearside Rear Shock absorber has a serious fluid leak |2.7.3| | 1 |
| Nearside Front Upper Suspension arm locating pin locking device missing |2.4.G.3b| | 1 |
| Offside Front Seat belt affected by an insecure seat fixing |5.2.1b| | 1 |
| Nearside Front Shock absorber insecure |2.7.2b| | 1 |
| Steering system excessively tight |2.2.D.1| | 1 |
| Front Brake locking device insecure |3.2.A1e| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Horn missing |1.7.1| | 1 |
| Nearside Front Brake hose twisted |found during steering lock to lock check| |2.2.D.2b| | 1 |
| Nearside Front Brake pipe fouled by moving parts |3.6.B.2a| | 1 |
| Offside Front Brake pipe fouled by moving parts |3.6.B.2a| | 1 |
| Nearside Front brake caliper leaking |3.6.A.1| | 1 |
| An item not tested |Manual| | 1 |
| Direction indicators flashing more than 120 times a minute |1.4.A.2g| | 1 |
| Fuel cap/sealing device sealing washer deteriorated |7.2.4c| | 1 |
| Nearside rear brake recording little or no effort |3.7.B.5a| | 1 |
| Nearside Stop lamp adversely affected by the operation of another lamp |1.2.1f| | 1 |
| Nearside Front Lower Front suspension has excessive play in a lower wishbone bearing |2.5.B.1a| | 1 |
| Nearside Front Steering rack gaiter missing or no longer prevents the ingress of dirt |2.1.3 |g| |ii|| | 1 |
| Nearside Front Lower Shock absorbers insecurely attached |5.3.2 |a| |i|| | 1 |
| Nearside Front Suspension component insecurely attached wheel bearing hub |5.3.3 |a| |i|| | 1 |
| Nearside Headlamp not working on main beam |1.7.5a| | 1 |
| Brake pedal spongy |3.3.B.1b| | 1 |
| Brake has no servo assistance |3.3.B.2| | 1 |
| Nearside Front Upper Suspension arm has excessive play in a ball joint |2.4.G.2| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Offside Throttle operating incorrectly |6.2.1f| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Offside Front Track rod end ball joint dust cover excessively damaged or deteriorated so that it no longer prevents the ingress of dirt |2.1.3 |g| |ii|| | 1 |
| Offside Rear Outer Rear position lamp|s| not working marker light |1.1.A.3b| | 1 |
| Nearside Rear position lamp|s| excessively deteriorated so that it is not visible from a reasonable distance |1.1.A.3d| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Nearside Upper Front suspension ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt |2.4.G.2| | 1 |
| Front Front position lamp|s| incorrect colour |1.1.A.3e| | 1 |
| Front Brake pipe fouled by moving parts |3.6.B.2a| | 1 |
| Offside Rear Wheel nut|s| loose |4.2.A.1e| | 1 |
| Nearside Headlamp aim beam image kick up to the offside |1.8| | 1 |
| Offside Headlamp aim beam image kick up to the offside |1.8| | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Exhaust emits visible black smoke at idle (8.2.1.2 (f)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Offside Rear Position lamp not working (4.2.1 (a) (ii)) | 1 |
| Nearside Stop lamp(s) not working (4.3.1 (a) (ii)) | 1 |
| Stop lamp(s) all not working (4.3.1 (a) (iii)) | 1 |
| Nearside Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 1 |
| Nearside Track rod end ball joint has excessive play (2.1.3 (b) (i)) | 1 |
| Nearside Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Rear Stop lamp(s) not working (4.3.1 (a) (ii)) | 1 |
| Offside Rear Service brake excessively binding (1.2.1 (f)) | 1 |
| Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Windscreen washer jets misaligned and not providing sufficient fluid to the windscreen (3.5 (a)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Stop lamp(s) emits other than a steady red light (4.3.3 (a) (ii)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Windscreen wiper not working (3.4 (a)) | 1 |