| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 73 |
| Registration plate lamp issues | 38 |
| Rear reflector on motorcycle missing |1.4.1| | 27 |
| Drive chain excessively loose |6.2.1d| | 22 |
| Registration plate issues | 20 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 20 |
| Rear reflector missing (4.8.2 (a) (ii)) | 14 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 13 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 10 |
| Rear Brake excessively binding (1.2.1 (f)) | 9 |
| Drive chain worn to excess |6.2.1e| | 9 |
| Horn not working (7.7 (a)) | 9 |
| Horn not working |1.7.3a| | 9 |
| 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| | 8 |
| Handlebar deformed |2.1.1b| | 7 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 6 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 6 |
| Rear Wheel spindle locking device missing (5.2.1 (d)) | 6 |
| Front Brake excessively binding (1.2.1 (f)) | 6 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 6 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 5 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 5 |
| Headlamp insecure |1.2.3b| | 4 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 4 |
| Rear Upper Shock absorber has an excessively worn bush (5.3.2 (c)) | 4 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 4 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 4 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 4 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 4 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 4 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 3 |
| Rear Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Nearside Rear Direction indicators not working |1.5.1c| | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Nearside Rear Drive chain excessively loose (6.1.7 (c) (i)) | 3 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 3 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 3 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 3 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 3 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Offside Front Position lamp not working (4.2.1 (a)) | 2 |
| Front Position lamp not working (4.2.1 (a)) | 2 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 2 |
| Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Headlamp aim unable to be tested (4.1.2 (b)) | 2 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 2 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Handlebar fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 2 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 2 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Handlebar deformed to the extent that steering is affected (2.2.1 (c) (ii)) | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 2 |
| Drive chain fouling another component |6.2.1d| | 2 |
| Offside Rear Footrest insecure (6.2.12 (a)) | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Headlamp insecure (4.1.1 (c)) | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front suspension assembly component excessively misaligned |2.3.1| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 2 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 2 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 2 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 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 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Front Wheel excessively distorted (5.2.2 (c) (i)) | 2 |