| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 110 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 36 |
| Front wheel bearings are excessively rough |2.3.5b| | 31 |
| Drive chain excessively loose |6.2.1d| | 30 |
| Front wheel bearings have excessive free play |2.3.5b| | 29 |
| Registration plate issues | 27 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 24 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 24 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 22 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 18 |
| Horn not working |1.7.3a| | 16 |
| Drive chain worn to excess |6.2.1e| | 16 |
| Brake hose damaged | 15 |
| Nearside Handlebar mounting clamp bolt loose |2.1.1a| | 14 |
| Offside Rear Footrest missing |6.2.1a| | 14 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 14 |
| Throttle operating incorrectly |6.2.1f| | 13 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 13 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 11 |
| Rear reflector on motorcycle missing |1.4.1| | 11 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 11 |
| Steering headbearing has excessive free play |2.2.2| | 9 |
| Fuel system component insecure |7.2.1b| | 8 |
| Rear Footrest missing |6.2.1a| | 8 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 8 |
| Nearside Rear Footrest missing |6.2.1a| | 8 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 8 |
| Nearside Front Direction indicators not working |1.5.1c| | 8 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 7 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 7 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Drive chain excessively tight |6.2.1d| | 7 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 6 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 6 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 5 |
| Nearside Handlebar mounting clamp loose |2.1.1a| | 5 |
| Stop lamp remains on when the brake is released |1.3.1e| | 5 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 5 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 5 |
| Offside Handlebar mounting clamp bolt loose |2.1.1a| | 5 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 5 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 5 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 5 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 5 |
| Offside Front Direction indicators not working |1.5.1c| | 5 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Direction indicators not working |1.5.1c| | 4 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Nearside Front Direction indicator not working |1.5.1c| | 4 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 4 |
| Nearside Fairings insecure and likely to impede the steering |2.1.2e| | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 4 |
| Rear Position lamp not working (4.2.1 (a)) | 4 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 3 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 3 |
| Front Steering headbearing has excessive free play |2.2.2| | 3 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 3 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 3 |
| Offside Front Direction indicator not working |1.5.1c| | 3 |
| Offside Rear Direction indicator not working |1.5.1c| | 3 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 3 |
| Rear Drive chain worn to excess |6.2.1e| | 3 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Indicator switch insecure |1.5.4| | 3 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 3 |
| Offside Footrest insecure |6.2.1a| | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Offside Rear Direction indicator insecure |1.5.3b| | 3 |
| Position lamp switch insecure |1.1.4b| | 3 |
| Front suspension has inadequate damping effect. |2.3.6c| | 3 |
| Offside Rear Direction indicators not working |1.5.1c| | 3 |
| Nearside Front Footrest insecure |6.2.1a| | 3 |
| Offside Fairings insecure and likely to impede the steering |2.1.2e| | 3 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| 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| | 3 |
| Offside Handlebar mounting clamp loose |2.1.1a| | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 3 |
| Fuel system component leaking |7.2.1a| | 3 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 3 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 3 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Rear Hydraulic brake control feels spongy rear brake very poor performance needs bleeding |3.1.4a| | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride missing front pinch bolt bottom fork leg O/S but secondary one fitted |6.2.1h| | 2 |
| Rear Brake pedal insecure |3.1.2a| | 2 |
| Rear Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Rear Brake hose fouling |3.2.B3b| | 2 |
| Front Wheel has an excessively eccentric bead rim. |4.2.2| | 2 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Nearside Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Headlamp incorrect colour |1.2.1| | 2 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Rear suspension component loose |2.4.A.1a| | 2 |
| Rear Brake disc|s| securing bolt|s| missing |3.2.A1g| | 2 |
| Rear Seat insecure |6.2.1a| | 2 |
| Front position lamp insecure |1.1.1c| | 2 |
| Indicator tell tale not functioning |1.5.2| | 2 |
| Offside Front Direction indicator insecure |1.5.3b| | 2 |
| Nearside Front Handlebar mounting clamp bolt loose |2.1.1a| | 2 |
| Nearside Front Direction indicator missing |1.5.1a| | 2 |
| Rear Drive chain excessively loose |6.2.1d| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Rear Brake pedal attachment screws loose |3.1.2b| | 2 |
| Front Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 2 |
| Front mudguard insecure |2.3.7| | 2 |
| Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 2 |
| Centre Rear Lower Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Exhaust mounting missing |7.1.1c| | 2 |
| Headlamp switch insecure |1.2.4| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Offside Front Footrest insecure |6.2.1a| | 2 |
| Brake pedal pivots excessively worn |3.1.3a| | 2 |
| Offside Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Rear Brake master cylinder leaking |1.1.10 |b| |ii|| | 2 |
| Nearside Footrest insecure |6.2.1a| | 2 |
| Rear Brake rod excessively damaged |3.2.A1c| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| Rear Footrest missing (6.2.12 (a)) | 2 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Rear Brake excessively binding (1.2.1 (f)) | 2 |
| Registration plate lamp issues | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Fuel tank insecure (6.1.3 (a) (i)) | 2 |
| Rear Wheel spindle loose (5.2.1 (c) (i)) | 2 |