| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 71 |
| Headlamp aim out of alignment | 62 |
| Registration plate issues | 37 |
| Drive chain excessively loose |6.2.1d| | 36 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 29 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 24 |
| Drive chain worn to excess |6.2.1e| | 21 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 20 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 19 |
| Horn not working |1.7.3a| | 18 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 16 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 16 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 16 |
| Headlamp insecure |1.2.3b| | 16 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 15 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 14 |
| Direction indicators not working |1.5.1c| | 11 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 10 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 10 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 9 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 9 |
| Nearside Rear Direction indicators not working |1.5.1c| | 9 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 9 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 8 |
| Nearside Rear Direction indicator not working |1.5.1c| | 8 |
| Offside Rear Direction indicators not working |1.5.1c| | 7 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 7 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 7 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 7 |
| Steering headbearing has excessive free play |2.2.2| | 7 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 6 |
| Offside Rear Direction indicator not working |1.5.1c| | 6 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Direction indicator not working |1.5.1c| | 5 |
| Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 5 |
| 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| | 5 |
| Nearside Front Direction indicators not working |1.5.1c| | 5 |
| Handlebar deformed |2.1.1b| | 5 |
| Headlamp aim beam image kick up to the offside |1.6| | 5 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Front Direction indicator not working |1.5.1c| | 5 |
| Rear Direction indicator not working |1.5.1c| | 5 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 5 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 4 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 4 |
| Rear reflector on motorcycle obscured |1.4.1| | 4 |
| Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Headlamp aim not tested |1.6| | 4 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 4 |
| Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Offside Rear Direction indicator missing |1.5.1a| | 3 |
| Offside Rear Direction indicator insecure |1.5.3b| | 3 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 3 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 3 |
| Offside Front Direction indicators not working |1.5.1c| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 3 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 3 |
| Front Direction indicator missing |1.5.1a| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Front Direction indicators not working |1.5.1c| | 3 |
| Rear Direction indicators not working |1.5.1c| | 3 |
| Offside Front Direction indicator not working |1.5.1c| | 3 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 3 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 3 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Indicator tell tale not functioning |1.5.2| | 3 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 3 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 2 |
| Offside Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Direction indicator missing |1.5.1a| | 2 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Horn is not continous or uniform |1.7.3c| | 2 |
| Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 2 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Offside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Rear Direction indicator insecure |1.5.3b| | 2 |
| Rear 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 suspension assembly component missing |2.3.1| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Rear Direction indicator missing |1.5.1a| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Rear position lamp insecure |1.1.1c| | 2 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 2 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 2 |
| Nearside Rear Direction indicator missing |1.5.1a| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Nearside Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Horn missing |1.7.1| | 2 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Nearside Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear Drive chain excessively loose |6.2.1d| | 2 |
| Nearside Steering lock stop ineffective |2.1.3| | 2 |
| Rear Rear reflector on motorcycle obscured |1.4.1| | 2 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Headlamp switch faulty |1.2.4| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Steering lock stop missing |2.1.3| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Horn not loud enough to be heard by another road user Batt poor charge |1.7.3a| | 1 |
| Direction indicator flashing less than 60 times a minute Battery poor charge |1.5.1c| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Fuel system component leaking carburetta |7.2.1a| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Offside 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 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Nearside Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Stop lamp insecure |1.3.3b| | 1 |
| Front Front suspension assembly has excessive free play in the pivot bearings. |2.3.2| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Front Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Drive chain excessively loose rar |6.2.1d| | 1 |
| Front Front position lamp insecure |1.1.1c| | 1 |
| Rear Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Brake cylinder leaking hydraulic fluid |3.2.B1e| | 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 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Central Fuel system component leaking carburetor leaking |6.1.3 |b| |i|| | 1 |
| Plate brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Rear suspension bush has excessive free play Rear swing arm |2.4.A2a|i|| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Stop lamp insecure |1.3.3b| | 1 |
| Front suspension assembly component loose |2.3.1| | 1 |
| Front Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Rear Rear reflector on sidecar does not face squarely to the rear |1.4.1| | 1 |
| Offside Chain guard insecure |6.2.1c| | 1 |
| Nearside Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear Brake disc fractured |1.1.14 |a| |ii|| | 1 |
| Offside Front Direction indicator missing |1.5.1a| | 1 |
| Rear Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Brake hose damaged | 1 |
| Centre Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Nearside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 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 Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Nearside Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Nearside Rear Drive chain excessively tight |6.2.1d| | 1 |
| Brake lever pivots excessively worn |3.1.3a| | 1 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Brake lever insecure |3.1.2a| | 1 |
| Front Front shock absorber seal failed and leaking oil Both |2.3.3| | 1 |
| Front Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Front Headlamp switch faulty |1.2.4| | 1 |
| Front Handlebar deformed |2.1.1b| | 1 |
| Nearside Rear Drive chain worn to excess |6.2.1e| | 1 |
| Fork yoke deformed |2.1.1b| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Front Brake lever mounting cracked |3.1.2c| | 1 |
| Nearside Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Offside Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |
| Brake component has an inadequate repair |3.1.5| | 1 |
| Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Headlamp at least one does not illuminate on dipped beam Dip Not working |1.2.2a|i|| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Floor brake test Neither brake control achieves an efficiency of 25% |3.3.C1b| | 1 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Nearside Rear suspension has a fracture of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Rear Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Nearside Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Offside Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear reflector on motorcycle dirty and function impaired |1.4.2a| | 1 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Rear Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Steering control handlebar movement restricted by cables caught on a projection |2.1.2c| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear position lamp flickers when tapped lightly by hand |1.1.3c| | 1 |
| Horn control not readily accesible. |1.7.2a| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Front suspension assembly component excessively bent |2.3.1| | 1 |
| Rear Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 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 |
| Nearside Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Offside Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Offside Rear Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Position lamp not working |4.2.1 |a|| | 1 |
| Nearside Front Direction indicator likely to become detached |4.4.1 |c| |ii|| | 1 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Front Brake lever insecure |1.1.2 |e| |i|| | 1 |
| Nearside Rear Footrest missing |6.2.12 |a|| | 1 |
| Offside Rear Footrest missing |6.2.12 |a|| | 1 |
| Fuel cap leaking Sealing washer missing |6.1.3 |b| |i|| | 1 |
| Direction indicator damaged and function impaired lh operates rh lamps
rh operates lh lamps |1.5.3a| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride rear wheel axle not centrally secured - only a few threads holding lh nut on to axle |6.2.1h| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Decelerometer brake test no brake control achieves an efficiency of 30% |3.3.E1a| | 1 |
| Nearside Handlebar deformed |2.1.1b| | 1 |
| Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Nearside Steering lock stop missing |2.1.3| | 1 |
| Offside Steering lock stop missing |2.1.3| | 1 |
| Nearside Lower Motorcycle structure cracked |6.1.1a| | 1 |
| Fuel hose leaking |7.2.1a| | 1 |
| Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Horn control not functioning. |1.7.2b| | 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 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Lower Steering headbearing has excessive free play |2.2.2| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Rear position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Rear Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Front Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Rear Brake pedal insecure |3.1.2a| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Nearside Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Offside Direction indicator missing |1.5.1a| | 1 |
| Nearside Direction indicator missing |1.5.1a| | 1 |
| Rear Wheel spoke cracked. |4.2.1b| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear position lamp adversely affected by the operation of the horn |1.1.3b| | 1 |
| Headlamp main beam affected by the operation of the horn |1.2.2c| | 1 |