| Most common failures | No# failures |
|---|
| Drive chain excessively loose |6.2.1d| | 19 |
| Headlamp aim out of alignment | 17 |
| Drive chain worn to excess |6.2.1e| | 11 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 9 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Registration plate issues | 7 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 5 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 4 |
| Rear Footrest missing |6.2.1a| | 4 |
| Horn not working |1.7.3a| | 4 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Drive chain excessively tight |6.2.1d| | 4 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Registration plate lamp issues | 4 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 4 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear Drive chain excessively loose |6.2.1d| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 2 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Footrest missing |6.2.1a| | 1 |
| Throttle operating incorrectly lock to lock reving |6.2.7 |a| |i|| | 1 |
| Front Shock absorber has a serious fluid leak forks |5.3.2 |b|| | 1 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Rear Roller brake test indicates a binding brake pedal sticking causing brake to stick |3.3.A1a| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Nearside Rear Direction indicator missing |1.5.1a| | 1 |
| Horn missing |1.7.1| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Rear Stop lamp insecure |1.3.3b| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Nearside Front Direction indicator missing |1.5.1a| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Front shock absorber seal failed and leaking oil both |2.3.3| | 1 |
| Rear Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Rear brake disc in such a condition that it is seriously weakened | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 1 |
| Offside Rear Footrest missing (6.2.12 (a)) | 1 |
| Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Lower Engine mounting/bracket excessively loose (6.1.8 (a) (ii)) | 1 |
| Rear Brake disc significantly and obviously worn Warped (1.1.14 (a) (i)) | 1 |
| Throttle operating incorrectly Throttle sticking (6.2.7 (a) (i)) | 1 |
| Nearside Front Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Front Fork yoke deformed |2.1.1b| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride chain link clip |6.2.1h| | 1 |
| Nearside Front Shock absorber has a serious fluid leak Fork leg |5.3.2 |b|| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Brake disc fractured (1.1.14 (a) (ii)) | 1 |
| Front suspension assembly component excessively bent fork stanchions |2.3.1| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |
| Rear reflector on sidecar missing |1.4.1| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride missing off side rear foot peg locking device |6.2.1h| | 1 |
| Offside Rear Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Headlamp at least one does not illuminate on main beam dip not working |1.2.2a|ii|| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies clean terminals on switch |1.3.1a| | 1 |
| Rear Brake pipe union leaking fluid foot brake |3.2.B4| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Horn not working (7.7 (a)) | 1 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Steering headbearing has excessive wear or free play headrace bearings have excessive free play |2.2.2 |f| |i|| | 1 |
| Front Stop lamp not working front stop lamp switch is inoperative |4.3.1 |a| |ii|| | 1 |
| Front Brake lining|s| less than 1.0 mm thick |1.1.13 |a|| | 1 |
| Rear Brake lining|s| less than 1.0 mm thick |1.1.13 |a|| | 1 |
| Offside Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Offside Rear Drive chain excessively loose (6.2.1d) | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Exhaust system insecure |6.1.2 |a|| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Fuel cap ineffective (6.1.3 (b) (i)) | 1 |
| Nearside Indicator switch insecure |1.5.4| | 1 |
| Offside Rear Direction indicators not working and insecure |1.5.1c| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Front Brake disc fractured (1.1.14 (a) (ii)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 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 Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Rear Brake fluid reservoir insecurely mounted |3.2.B1a| | 1 |
| Central Rear Lower Wheel spoke excessively loose |4.2.1b| | 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 |
| Stop lamp remains on when the brakes are released | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Offside Lower Front suspension assembly component missing |2.3.1| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies brake |1.3.1a| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Clutch lever shortened so it cannot be readily operated (6.2.7 (b)) | 1 |
| Exhaust silencer insecure (8.1.1 (b) (i)) | 1 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Offside Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Nearside Rear Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Nearside Rear Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |