| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 11 |
| Drive chain excessively loose |6.2.1d| | 10 |
| Drive chain worn to excess |6.2.1e| | 8 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Rear reflector on motorcycle obscured |1.4.1| | 6 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 6 |
| Offside Rear Footrest missing |6.2.1a| | 6 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 5 |
| Nearside Rear Footrest missing |6.2.1a| | 5 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 3 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Rear Footrest missing |6.2.1a| | 3 |
| Rear reflector on motorcycle missing |1.4.1| | 3 |
| Headlamp insecure |1.2.3b| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Indicator switch insecure |1.5.4| | 2 |
| Headlamp aim so that beam "kick up" is not visible on the screen LED headlamp, no beam pattern |4.1.2 |a|| | 2 |
| Rear Brake pedal has insufficient reserve travel |1.1.2 |a|| | 2 |
| Offside Front Footrest insecure |6.2.1a| | 2 |
| Rear position lamp insecure |1.1.1c| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear Brake locking device missing |3.2.A1e| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Nearside Handlebar mounting clamp loose |2.1.1a| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front Steering lock stop missing |2.1.3| | 1 |
| Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Fuel cap sealing washer torn |7.2.2c| | 1 |
| Headlamp insecure securing bolts missing |4.1.1 |c|| | 1 |
| Nearside Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Offside Handlebar mounting clamp loose |2.1.1a| | 1 |
| Footrest missing |6.2.1a| | 1 |
| Brake lever insecure |3.1.2a| | 1 |
| Front suspension assembly component excessively bent |2.3.1| | 1 |
| Headlamp switch insecure |1.2.4| | 1 |
| Front Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 1 |
| Rear Suspension arm pin or bush excessively worn |5.3.4 |a| |i|| | 1 |
| Nearside Rear Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Rear Rear suspension component loose |2.4.A.1a| | 1 |
| Front Brake lining|s| contaminated by oil or grease |3.2.A1k| | 1 |
| Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Front Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Direction indicators affected by the operation of another lamp Dip beam turn off |1.5.1c| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear wheel spindle loose |2.4.A.2b| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Rear Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Fuel cap sealing washer missing |7.2.2c| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Drive chain excessively tight |6.1.7 |k| |i|| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Fuel pipe leaking |7.2.1a| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies control |1.3.1a| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Horn not working |1.7.3a| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Front suspension assembly component excessively bent both fork legs bent |2.3.1| | 1 |
| Rear suspension fouling which affects the movement of the rear suspension rear offside suspension mount fouling exhaust can |2.4.A.3a| | 1 |
| Exhaust excessively deteriorated leaking at joint of header pipe and can |7.1.1a| | 1 |
| Stop lamp does not illuminate immediately a brake applies brake light does not work when rear brake applied |1.3.1a| | 1 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Fuel cap mounting flange/sealing method defective |7.2.2c| | 1 |
| Front Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Lower Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Nearside Front mudguard insecure |2.3.7| | 1 |
| Brake fluid reservoir fluid level dangerously low front resevior empty |3.2.B1d| | 1 |
| Exhaust mounting does not fully support the exhaust system weld cracked |7.1.1.c| | 1 |
| Drive chain sprocket carrier worn to excess cush rubbers and carrier bearings worn |6.2.1e| | 1 |
| Rear Brake rod excessively damaged |3.2.A1c| | 1 |
| Rear Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Rear reflector missing Obscured by "L" plate (4.8.2 (a) (ii)) | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Fuel cap leaking |6.1.3 |b| |i|| | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Registration plate issues | 1 |