| Most common failures | No# failures |
|---|
| Horn not working |1.7.3a| | 16 |
| Headlamp aim out of alignment | 14 |
| Rear reflector on motorcycle missing |1.4.1| | 13 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 12 |
| Direction indicators not working |1.5.1c| | 8 |
| Registration plate issues | 7 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 7 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 7 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Rear Wheel spoke excessively loose |4.2.1b| | 6 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Drive chain excessively loose |6.2.1d| | 5 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 5 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 4 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 4 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Drive chain excessively tight |6.2.1d| | 4 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 3 |
| Handlebar deformed |2.1.1b| | 3 |
| Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 3 |
| Front Direction indicators not working |1.5.1c| | 3 |
| Rear Direction indicators not working |1.5.1c| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Horn is not continous or uniform |1.7.3c| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 2 |
| Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 2 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 2 |
| Front suspension assembly component excessively bent |2.3.1| | 2 |
| Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 2 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Rear wheel spindle securing nut locking device missing (2.4.A.2b) | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Direction indicator not working |1.5.1c| | 2 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 2 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Nearside Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Front Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Nearside Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Front Direction indicator not working |1.5.1c| | 2 |
| Rear Direction indicator not working |1.5.1c| | 2 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 2 |
| Offside Direction indicators flashing less than 60 times a minute |1.5.1c| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Indicator switch insecure |1.5.4| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Front position lamp incorrect colour |1.1.2a| | 2 |
| Nearside Front Direction indicator missing |1.5.1a| | 1 |
| Offside Front Direction indicator missing |1.5.1a| | 1 |
| Nearside Rear Direction indicator missing |1.5.1a| | 1 |
| Offside Rear Direction indicator missing |1.5.1a| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front position lamp missing |1.1.1a| | 1 |
| Rear Brake drum|s| securing bolt|s| missing |3.2.A1g| | 1 |
| Upper Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 1 |
| Headlamp at least one does not illuminate on dipped beam (1.2.2a(i)) | 1 |
| Nearside Front shock absorber seal failed and leaking oil (2.3.3) | 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 |
| Brake locking device insecure (3.2.A1e) | 1 |
| Locking device(s) not correctly fitted which may make the motor bicycle dangerous to ride (6.2.1h) | 1 |
| Drive chain excessively loose (6.2.1d) | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Direction indicator not working right hand rear |4.4.1 |a| |ii|| | 1 |
| Shock absorber has a serious fluid leak right hand |5.3.2 |b|| | 1 |
| Footrest missing rear |6.2.12 |a|| | 1 |
| Rear Drive chain sprocket excessively loose Sprocket carrier bearing worn |6.1.7 |c| |i|| | 1 |
| Rear Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Front All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Rear All direction indicators 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 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Offside Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Steering headbearing has excessive wear or free play steering movement notchy |2.2.2 |f| |i|| | 1 |
| Nearside Rear Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Direction indicator missing |1.5.1a| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Offside Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Front Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Rear Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Front Horn control not functioning. |1.7.2b| | 1 |
| Front Horn is not continous or uniform |1.7.3c| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Offside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Rear Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Rear Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Rear Direction indicator insecure |1.5.3b| | 1 |
| Rear Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Direction indicators affected by the operation of another lamp all indicators not working correctly |1.5.1c| | 1 |
| Floor brake test indicates a sticking brake front brake sticks on and lever not return correctly |3.3.C2c| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Brake reaction bracket securing bolt|s| missing split pin missing from rear brake arm |3.2.A1j| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Rear wheel has a loose wheel bolt|s| |4.2.3a| | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Nearside Rear Rear wheel spindle loose |2.4.A.2b| | 1 |
| Front Brake performance not tested |3.3| | 1 |
| Rear Brake performance not tested |3.3| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Front Stop lamp switch with a delay in operation Front brake switch connect to the lever (4.3.2 (a) (ii)) | 1 |
| Rear Drive chain sprocket so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Front Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Rear Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Nearside Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Direction indicators not working no voltage battery flat |1.5.1c| | 1 |
| Direction indicator not working none working due to flat battery |1.5.1c| | 1 |
| Stop lamp does not illuminate immediately a brake applies front and rear brakes due to battery being flat |1.3.1a| | 1 |
| Rear Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Motorcycle structure joining/attachment plate or fastening insecure front mudguard bolts missing (6.1.1 (b) (i)) | 1 |
| Motorcycle structure is so deformed it is likely to adversely affect braking or steering main frame bent and damaged |6.1.1 |a| |ii|| | 1 |
| Handlebar deformed to the extent that steering is affected handiebars bent and twisted |2.2.1 |c| |ii|| | 1 |
| Rear Brake pedal has insufficient reserve travel rear brake pedal has to much travel |1.1.2 |a|| | 1 |
| Wheel alignment incorrect which adversely affects the handling wheel alignment out do to frame being bent back |2.4 |a|| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Direction indicator missing all 4 |1.5.1a| | 1 |
| Rear Front mudguard insecure |2.3.7| | 1 |
| Rear suspension bearing has excessive free play swinging arm bushs/bearings |2.4.A2a|i|| | 1 |
| Stop lamp affected by the operation of another lamp goes out when headlights on |1.3.2| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 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 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Nearside Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Nearside Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Front 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 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 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 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| All position lamps not working |4.2.1 |a|| | 1 |
| Horn not working (7.7 (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 |
| Front Brake cable badly frayed |3.2.A1b| | 1 |
| Front Horn not working (7.7 (a) (ii)) | 1 |
| Offside Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Wheel spoke excessively corroded |4.2.1b| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Headlamp main beam affected by the operation of another lamp main beam dull |1.2.2c| | 1 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Front Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Horn missing |1.7.1| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Front Footrest insecure |6.2.1a| | 1 |