| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 70 |
| Registration plate issues | 56 |
| Registration plate lamp issues | 43 |
| Rear reflector on motorcycle missing |1.4.1| | 28 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 28 |
| Rear reflector missing (4.8.2 (a) (ii)) | 17 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 16 |
| Drive chain excessively loose |6.2.1d| | 14 |
| Drive chain excessively tight |6.2.1d| | 12 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 11 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 10 |
| Horn not working |1.7.3a| | 9 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 8 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 8 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 7 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 7 |
| Stop lamp remains on when the brakes are released | 6 |
| Throttle operating incorrectly |6.2.1f| | 6 |
| Drive chain worn to excess |6.2.1e| | 6 |
| Rear Brake excessively binding (1.2.1 (f)) | 6 |
| Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 5 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 4 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 4 |
| Nearside Front Direction indicators not working |1.5.1c| | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 4 |
| Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Horn not working (7.7 (a) (ii)) | 3 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 3 |
| Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 3 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Offside Front Direction indicator insecure |1.5.3b| | 3 |
| Nearside Front Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 3 |
| Front Brake excessively binding (1.2.1 (f)) | 3 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 3 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Offside Front Footrest insecure |6.2.1a| | 2 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Exhaust has part of the system missing |7.1.1a| | 2 |
| Rear reflector on motorcycle missing replace |1.4.1| | 2 |
| Rear Drive chain excessively tight |6.2.1d| | 2 |
| Nearside Drive chain excessively loose |6.2.1d| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 2 |
| Offside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Front Brake disc contaminated (1.1.14 (b)) | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Rear Footrest missing (6.2.12 (a)) | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Headlamp light source and lamp not compatible |4.1.4 |c|| | 2 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Nearside Front Direction indicator not working |4.4.1 |a| |ii|| | 2 |
| Offside Front Direction indicator not working |4.4.1 |a| |ii|| | 2 |
| Nearside Front Footrest insecure (6.2.12 (a)) | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Horn not working (7.7 (a)) | 2 |
| Offside Rear Footrest insecure (6.2.12 (a)) | 2 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 2 |
| 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| | 2 |
| Front Valve stem seriously damaged |5.2.3 |j|| | 2 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 2 |