| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 24 |
| Registration plate issues | 10 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 8 |
| Horn not working |1.7.3a| | 7 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Riders seat insecure |6.2.1a| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Rear reflector on motorcycle missing |1.4.1| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Fuel system component leaking |7.2.1a| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Nearside Direction indicator not working |1.5.1c| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 2 |
| 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| | 2 |
| Offside Footrest insecure |6.2.1a| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Central Rear Upper Position lamp not working |4.2.1 |a|| | 1 |
| Central Rear Upper Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Stop lamp does not illuminate immediately a brake applies rear brake pedal does not operate stop light |1.3.1a| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Drive chain excessively loose |6.2.1d| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Rear Brake component insecure |1.1.21 |c|| | 1 |
| Drive chain excessively tight |6.1.7 |k| |i|| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Fuel system component leaking Fuel appears to be leaking from far offside carburettor. (6.1.3 (b) (i)) | 1 |
| Rear Position lamp not working Tail lamp not working. (4.2.1 (a)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Offside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Stop lamp insecure |1.3.3b| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Rear Brake cylinder leaking (1.1.16 (b) (i)) | 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 |
| Nearside Rear Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Horn missing |1.7.1| | 1 |
| Fuel system component insecure Tank |7.2.1b| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering Brake lines |2.1.2a| | 1 |
| Front suspension assembly component cracked |2.3.1| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front wheel spindle loose |2.3.3a| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Upper Fuel hose leaking |7.2.1a| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Fuel pipe leaking Feed pipe at carb. |6.1.3 |b| |i|| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Lower Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Headlamp aim beam image kick up to the offside Fitted head lamp mask at V.T.S. |1.6| | 1 |
| Throttle operating incorrectly Adjusted cable free play to obtain correct engine idle rpm. |6.2.1f| | 1 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Steering lock stop ineffective |2.1.3| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Front Wheel spoke missing |4.2.1b| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Offside Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 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 |
| Front Shock absorber has a serious fluid leak |2.7.3| | 1 |
| Brake hose excessively deteriorated | 1 |
| Front wheel bearings are excessively rough |9.2.8c| | 1 |
| Front Front wheel bearings have excessive free play |9.2.8c| | 1 |
| Front Front suspension assembly has excessive free play between the sliding members |9.2.5d| | 1 |
| Front Front suspension inadequate damping effect |9.2.7d| | 1 |
| Front Front suspension has a fracture of a load bearing member or its supporting structure |9.2.9| | 1 |
| Front suspension has a modification which reduces the strength of a load bearing member or its supporting structure |9.2.9| | 1 |
| Nearside Rear Lower Suspension arm has excessive play in a pin/bush |2.4.G.2| | 1 |
| Offside Rear Lower Suspension arm has excessive play in a pin/bush |2.4.G.2| | 1 |
| Offside Rear Upper Suspension arm has excessive play in a pin/bush |2.4.G.2| | 1 |
| Front Brake pipe inadequately clipped |3.6.B.1| | 1 |
| Nearside Front brake disc contaminated by oil |3.5.1h| | 1 |
| Parking brake efficiency below requirements |3.7.D.4| | 1 |
| Front Trikes, quads or pre-68 vehicles, service brake efficiency below requirements |3.7.D.4| | 1 |
| Registration plate lamp issues | 1 |
| Offside Front Vehicle structure has damage which adversely affects braking or steering |6.1.A.1| | 1 |
| Hazard warning tell tale not working correctly |1.4.B.1e| | 1 |
| Offside Rear Upper Suspension arm has excessive play in a ball joint |2.4.G.2| | 1 |
| Horn not working |1.6.2a| | 1 |
| Front Front position lamp|s| not working |1.1.A.3b| | 1 |
| Front Brake pedal has insufficient reserve movement |3.3.A.5| | 1 |
| Hazard warning switch faulty |1.4.B.1d| | 1 |
| Direction indicators flashing more than 120 times a minute |1.4.A.2g| | 1 |
| Parking brake: efficiency below requirements |3.7.B.7| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Nearside Rear Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Offside Rear Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| An item not tested |Manual| | 1 |
| Rear Brake disc|s| insecure |3.2.A1g| | 1 |
| Position lamp switch faulty |1.1.4a| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Front Throttle operating incorrectly |6.2.1f| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Brake lever is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front suspension has a modification which reduces the strength of a load bearing member or its supporting structure. |2.3.8| | 1 |
| Nearside Handlebar handgrip missing |2.1.1c| | 1 |
| Nearside Brake disc|s| insecure |3.2.A1g| | 1 |
| Steering lock stop missing |2.1.3| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Rear Brake back plate|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Front Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Centre Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Centre Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Centre Rear Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Stop lamp does not illuminate immediately a brake applies Relaced bulb |1.3.1a| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Wheel spoke missing |4.2.1b| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Nearside Position lamp switch insecure |1.1.4b| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Nearside Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Centre Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Front Lower Front wheel spindle securing nut|s| loose |2.3.5a| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Front wheel insecure |4.2.3b| | 1 |