| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 36 |
| Rear reflector on motorcycle missing |1.4.1| | 21 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 17 |
| Registration plate issues | 16 |
| Drive chain excessively loose |6.2.1d| | 15 |
| Rear reflector missing (4.8.2 (a) (ii)) | 10 |
| Horn not working |1.7.3a| | 10 |
| Registration plate lamp issues | 8 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 6 |
| Throttle operating incorrectly |6.2.1f| | 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 |
| Rear reflector missing |4.8.2 |a| |ii|| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Drive chain worn to excess |6.2.1e| | 5 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 2 |
| 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|| | 2 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Horn not working (7.7 (a)) | 2 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Stop lamp remains on when the brakes are released | 1 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Offside Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Offside Front Brake disc significantly and obviously worn AT 3.6MM,BELOW MIN WEAR LIMIT OF 4.5MM (1.1.14 (a) (i)) | 1 |
| Nearside Front Brake disc significantly and obviously worn AT 3.6MM,BELOW MIN WEAR LIMIT OF 4.5MM (1.1.14 (a) (i)) | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Stop lamp not working bulb fitted (4.3.1 (a) (ii)) | 1 |
| Suspension component corroded and seriously weakened swing arm (5.3.3 (b) (i)) | 1 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear suspension bush has excessive free play top |2.4.A2a|i|| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Nearside Rear Lower Drive chain excessively loose |6.2.1d| | 1 |
| Headlamp light source and lamp not compatible |4.1.4 |c|| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Rear wheel spindle loose |2.4.A.2b| | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Rear Motorcycle structure corroded to the extent that the rigidity of the assembly is significantly reduced swing arm cross brace severely corroded (6.1.1 (c) (i)) | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Drive chain excessively tight, so that it is likely to fail |6.1.7 |k| |ii|| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Offside Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Brake pedal mounting cracked . |3.1.2c| | 1 |
| Front Front position lamp incorrect colour |1.1.2a| | 1 |
| Offside 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| | 1 |
| Rear Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Drive chain sprocket so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Stop lamp does not emit a steady light when front brake applied |1.3.1b| | 1 |
| Stop lamp not working front lever (4.3.1 (a) (ii)) | 1 |
| Rear Position lamp adversely affected by the operation of another lamp (4.2.3 (b)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Front Brake disc significantly and obviously worn Below recommend minimum thickness |1.1.14 |a| |i|| | 1 |
| Rear Brake disc significantly and obviously worn Worn below minimum recommended thickness |1.1.14 |a| |i|| | 1 |
| Upper Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear position lamp damaged and function impaired not on constantly and flickering |1.1.1b| | 1 |
| Rear Stop lamp remains on when the brake is released Pedal |1.3.1e| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Motorcycle structure joining/attachment plate or fastening insecure bellypan insecure (6.1.1 (b) (i)) | 1 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Front Stop lamp switch with a delay in operation |4.3.2 |a| |ii|| | 1 |
| Stop lamp not working Foot brake (4.3.1 (a) (ii)) | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Brake disc|s| cracked |3.2.A1g| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Central Front Lower Exhaust mounting missing |7.1.1c| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock not returning on R/H lock |2.1.4| | 1 |
| Upper Rear mono-shock insecure |2.4.B.4| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Central Rear Lower Brake excessively binding (1.2.1 (f)) | 1 |
| Central Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Central Rear Lower Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Nearside Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Headlamp missing |1.2.3a| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Offside Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Steering operation fouling on the fuel tank or bodywork on full lock |2.1.4 |b|| | 1 |
| Nearside Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Offside Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Stop lamp switch with a delay in operation |4.3.2 |a| |ii|| | 1 |
| Offside Rear All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Handlebar excessively deformed |2.2.1 |c| |i|| | 1 |
| Front Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Nearside Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Offside Throttle operating incorrectly sticking |6.2.7 |a| |i|| | 1 |
| Stop lamp not working correctly |4.3.1 |a| |ii|| | 1 |
| Front Exhaust has a major leak of exhaust gases headers (6.1.2 (a)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Stop lamp does not illuminate immediately a brake applies no brake lights working |1.3.1a| | 1 |
| Offside Handlebar deformed |2.1.1b| | 1 |
| Front Horn not working (7.7 (a)) | 1 |
| Front All position lamps not working |4.2.1 |a|| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Nearside Front Shock absorber has a serious fluid leak suspension leg (5.3.2 (b)) | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Drive chain horseshoe locking device likely to become detached WAS DETACHED(NOT FITTED) (6.1.7 (j) (ii)) | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Front Valve stem seriously misaligned (5.2.3 (j)) | 1 |
| Rear Valve stem seriously misaligned (5.2.3 (j)) | 1 |
| Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Drive chain horseshoe locking device likely to become detached |6.1.7 |j| |ii|| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Rear Motorcycle structure corroded to the extent that the rigidity of the assembly is significantly reduced (6.1.1 (c) (i)) | 1 |
| Central Rear Lower Motorcycle structure corroded to the extent that the rigidity of the assembly is significantly reduced (6.1.1 (c) (i)) | 1 |