| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 43 |
| Rear reflector on motorcycle missing |1.4.1| | 16 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 11 |
| Steering headbearing has excessive free play |2.2.2| | 10 |
| Horn not working |1.7.3a| | 9 |
| Registration plate issues | 9 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 6 |
| Drive chain worn to excess |6.2.1e| | 6 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Nearside Front Direction indicator not working |1.5.1c| | 4 |
| Drive chain excessively loose |6.2.1d| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 4 |
| Rear Footrest missing |6.2.1a| | 4 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 4 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 3 |
| Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 3 |
| Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Position lamp not working |4.2.1 |a|| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Front Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 2 |
| Front suspension assembly component loose |2.3.1| | 2 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Rear Brake locking device missing |3.2.A1e| | 2 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Nearside Front Footrest insecure |6.2.1a| | 2 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 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 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 2 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| All direction indicators not working |4.4.1 |a| |ii|| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Front position lamp incorrect colour |1.1.2a| | 2 |
| Nearside Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Brake locking device insecure torque arm |3.2.A1e| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Front Floor brake test indicates a severely grabbing brake |3.3.C2d| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Brake reaction bracket insecure |3.2.A1j| | 1 |
| Nearside Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Front Front wheel insecure |4.2.3b| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Position lamp switch insecure |1.1.4b| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front position lamp adversely affected by the operation of the horn |1.1.3b| | 1 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Front Brake disc|s| insecure |3.2.A1g| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Nearside Front Front suspension has a fracture of a load bearing member or its supporting structure. |2.3.8| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Offside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Nearside Front Wheel more than one fixing missing SPINDLE LOCKING DEVICE MISSING (5.2.1 (a) (ii)) | 1 |
| Offside Front Handlebar fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Rear Shock absorber likely to become detached UPPER SHOCK ABSORBER PIN (5.3.2 (a) (ii)) | 1 |
| Offside Rear Brake locking device missing |3.2.A1e| | 1 |
| Direction indicator missing |1.5.1a| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Brake pedal attachment screws missing. |3.1.2b| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front Headlamp dipped beam affected by the operation of the horn |1.2.2c| | 1 |
| Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Wheel more than one fixing missing Locking Device (Split Pin) (5.2.1 (a) (ii)) | 1 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| All position lamps adversely affected by the operation of the horn |1.1.3b| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Steering linkage locking device missing no locking device fitted to front wheel spindle (2.1.3 (d)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Rear mono-shock insecure |2.4.B.4| | 1 |
| Front Brake pipe inadequately supported |3.2.B2b| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Fuel tank leaking (6.1.3 (b) (i)) | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Chain guard insecure |6.2.1c| | 1 |
| Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Front Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Headlamp switch insecure |1.2.4| | 1 |
| Front wheel spindle loose |2.3.5a| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Nearside Position lamp switch insecure |1.1.4b| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Position lamp switch faulty |1.1.4a| | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Brake lever has restricted free movement Loose bolt adjusted (1.1.15 (e)) | 1 |
| Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 1 |
| Wheel spindle locking device missing (5.2.1 (d)) | 1 |
| Drive chain excessively tight |6.1.7 |k| |i|| | 1 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Brake pedal has insufficient reserve travel |1.1.2 |a|| | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear Brake component insecure |1.1.21 |c|| | 1 |
| Nearside Front Direction indicator obviously incorrectly positioned |4.4.3 |a|| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Rear Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Horn not working (7.7 (a)) | 1 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 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 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Brake pedal is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Nearside Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Indicator switch insecure |1.5.4| | 1 |
| Steering lock stop maladjusted |2.1.3| | 1 |
| Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Nearside Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Offside Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Suspension arm pin or bush likely to become detached split pin missing (5.3.4 (a) (ii)) | 1 |
| Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Offside Rear Upper Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Brake indicates excessive fluctuation of brake effort Rear Drum oval (1.2.1 (e)) | 1 |
| Nearside Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Offside Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Front position lamp incorrect colour |1.1.2a| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Front position lamp missing |1.1.1a| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Handlebar deformed |2.1.1b| | 1 |
| Front Steering lock stop ineffective |2.1.3| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |