| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 23 |
| Horn not working |1.7.3a| | 12 |
| Rear reflector on motorcycle missing |1.4.1| | 11 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 10 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 10 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 9 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 8 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 6 |
| Registration plate issues | 6 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Nearside Rear Direction indicator not working |1.5.1c| | 5 |
| Direction indicators not working |1.5.1c| | 5 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Rear Brake locking device missing |3.2.A1e| | 4 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Front Wheel spoke excessively loose |4.2.1b| | 4 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 3 |
| Front Steering headbearing has excessive free play |2.2.2| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Horn missing |1.7.1| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Brake locking device missing |3.2.A1e| | 3 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Offside Rear Direction indicator not working |1.5.1c| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 3 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Indicator tell tale missing |1.4.A.2a| | 2 |
| Handlebar mounting clamp loose |2.1.1a| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Fuel tank leaking |7.2.1a| | 2 |
| Chain guard insecure |6.2.1c| | 2 |
| Front Front position lamp|s| not working |1.1.A.3b| | 2 |
| Rear Front mudguard insecure |2.3.7| | 2 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Fuel system component leaking |7.2.1a| | 2 |
| Direction indicator not working |1.5.1c| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Rear Brake back plate|s| insecure |3.2.A1j| | 2 |
| Front Direction indicators not working |1.5.1c| | 2 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear Wheel spoke excessively loose |4.2.1b| | 2 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Parking brake not fitted on at least one wheel on a 3 wheeled vehicle |3.1.1| | 1 |
| Front Front position lamp|s| missing |1.1.A.3a| | 1 |
| Front Wheel fixing missing |single fixing| |5.2.1 |a| |ii|| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Offside Front Brake lever has insufficient reserve travel |1.1.2 |a|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Front Brake caliper|s| insecure |3.2.A1j| | 1 |
| Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Rear Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear Rear position lamp missing |1.1.1a| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Rear Brake caliper|s| insecure |3.2.A1j| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Inner Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Front wheel spindle securing nut|s| loose |2.3.3a| | 1 |
| Rear Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Brake back plate|s| insecure locking devices required |3.2.A1j| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride brake torque arm & sprocket bolts |6.2.1h| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Centre Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Nearside Stop lamp not working |1.2.1b| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Front Front mudguard insecure bolt missing |2.3.7| | 1 |
| Centre Front Lower Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Offside Rear Upper Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Centre Front Upper Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Centre Front Upper Horn not working |1.7.3a| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Offside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Front Brake pipe inadequately supported |3.2.B2b| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Front Brake locking device missing |3.2.A1e| | 1 |
| Stop lamp not working |1.2.1b| | 1 |
| Rear reflector missing |1.5.1a| | 1 |
| Horn not working |1.6.2a| | 1 |
| Brake pedal actuating rod excessively damaged and seriously weakened |3.3.A.1g| | 1 |
| Offside Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Seat insecure |6.2.1a| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Front Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Front Brake disc|s| securing bolt|s| loose |3.2.A1g| | 1 |
| Front wheel spindle securing nut|s| loose |2.3.5a| | 1 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Front Wheel spoke missing |4.2.1b| | 1 |
| Offside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Gradient brake test indicates a sticking brake |3.3.D1c| | 1 |
| Centre Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Centre Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Centre Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Outer Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Inner Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Centre Front Gradient brake test indicates a binding brake |3.3.D1c| | 1 |
| Offside Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Nearside Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Rear Stop lamp not working switch reqired reset |4.3.1 |a| |ii|| | 1 |
| Rear Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Steering lock stop missing |2.1.3| | 1 |
| Offside Steering lock stop missing |2.1.3| | 1 |
| Nearside 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 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Front Brake locking device insecure |3.2.A1e| | 1 |
| Front Exhaust mounting missing |7.1.1c| | 1 |
| Front Front wheel spindle securing nut locking device insecure |2.3.3a| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Front Brake drum|s| securing bolt|s| missing |3.2.A1g| | 1 |
| Motorcycle structure cracked |6.1.1a| | 1 |
| Fuel hose leaking |7.2.1a| | 1 |
| Front Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Rear Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Chain guard missing |6.2.1c| | 1 |
| Front Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Rear Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Steering column top bearing excessively worn |2.1.2c| | 1 |
| Front Front mudguard insecure Mounting bolts loose. |2.3.7| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Mechanical brake component locking device missing |3.5.1l| | 1 |
| Hazard warning lamps not flashing in phase, with ignition on |1.4.B.1f| | 1 |
| Hazard warning lamps not flashing in phase, with ignition off |1.4.B.1f| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Nearside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Brake lever mounting cracked |3.1.2c| | 1 |
| Rear Lower Brake reaction bracket insecure |3.2.A1j| | 1 |
| Offside Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Front Front suspension assembly component loose Top Fork Bolts |2.3.1| | 1 |
| Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Offside Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Fuel pipe leaking |7.2.1a| | 1 |
| Rear reflector on sidecar missing |1.4.1| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| 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| | 1 |
| Rear wheel spindle loose |2.4.A.2b| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Headlamp aim does not move downwards when dipped |1.6.5| | 1 |
| Front position lamp damaged and function impaired |1.1.1b| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Offside Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Offside Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Rear position lamp adversely affected by the operation of another lamp indicators |1.1.3b| | 1 |
| Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Brake linkage has abnormal movement of levers indicating excessive wear or maladjustment (1.1.15 (f)) | 1 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Offside Front Brake caliper leaking and braking performance affected (1.1.16 (b) (ii)) | 1 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Front Service brake excessively binding (1.2.1 (f)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Front Headlamp insecure (4.1.1 (c)) | 1 |
| Rear Brake component insecure Flexible hose loose (1.1.21 (c)) | 1 |
| Front Brake component insecure Flexible hose not secure on fork leg (1.1.21 (c)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |