| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 7 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Registration plate lamp issues | 3 |
| Drive chain excessively loose |6.2.1d| | 3 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Rear Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Headlamp insecure |4.1.1 |c|| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Exhaust is leaking and excessively noisey exhaust system valve pipe leaking |7.1.1b| | 1 |
| Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Rear All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Riders seat insecure |6.2.5 |a| |ii|| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Steering control handlebar movement restricted by taut cables Clutch & choke cables need re-routing |2.1.2c| | 1 |
| Throttle operating incorrectly sticking |6.2.1f| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Front Headlamp insecure (4.1.1 (c)) | 1 |
| Nearside Rear Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Brake hose excessively deteriorated | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Fuel hose leaking |7.2.1a| | 1 |
| Rear Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Headlamp aim not tested |4.1.2 |b|| | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Rear Drive chain sprocket excessively loose cush drive. (6.1.7 (c) (i)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Stop lamp not working Suspect constantly on (4.3.1 (a) (ii)) | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected engine revs increase significantly when handlebars are turned |6.2.7 |a| |ii|| | 1 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 1 |
| Offside Footrest insecure (6.2.12 (a)) | 1 |
| Indicator switch inoperative (4.4.2 (a) (ii)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected |6.2.7 |a| |ii|| | 1 |
| Nearside Front Direction indicator incorrect colour |4.4.3 |a|| | 1 |
| Offside Front Direction indicator incorrect colour |4.4.3 |a|| | 1 |
| Drive chain worn to excess chain has seized links |6.2.1e| | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride chain split link on wrong way round |6.2.1h| | 1 |
| Drive chain worn to excess very tight links chain not running in a straight line |6.2.1e| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Riders seat insecure |6.2.1a| | 1 |