| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 120 |
| Registration plate lamp issues | 47 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 42 |
| Drive chain excessively loose |6.2.1d| | 37 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 31 |
| Registration plate issues | 29 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 18 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 17 |
| Rear reflector on motorcycle missing |1.4.1| | 16 |
| Front Brake excessively binding (1.2.1 (f)) | 15 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 13 |
| Drive chain worn to excess |6.2.1e| | 11 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 11 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 10 |
| Drive chain excessively tight |6.2.1d| | 10 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 9 |
| Rear reflector missing (4.8.2 (a) (ii)) | 9 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 8 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 7 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 7 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 7 |
| Front wheel bearings have excessive free play |2.3.5b| | 6 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 6 |
| Offside Rear Footrest insecure |6.2.1a| | 6 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 6 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 6 |
| Horn not working |1.7.3a| | 6 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 5 |
| Stop lamp remains on when the brakes are released | 5 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 5 |
| Nearside Rear Direction indicator not working |1.5.1c| | 5 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 5 |
| Exhaust excessively deteriorated |7.1.1a| | 5 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 4 |
| Rear Brake excessively binding (1.2.1 (f)) | 4 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Nearside Rear Footrest missing |6.2.1a| | 4 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 4 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 4 |
| Nearside Front Brake disc contaminated (1.1.14 (b)) | 4 |
| Horn not working (7.7 (a)) | 4 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Front wheel bearings are excessively rough |2.3.5b| | 4 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| 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| | 4 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 3 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Offside Rear Footrest missing |6.2.1a| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Front Horn not working |1.7.3a| | 3 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 3 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 3 |
| Front Position lamp not working (4.2.1 (a)) | 3 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 3 |
| Offside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 3 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 2 |
| Offside Front Brake disc|s| cracked |3.2.A1g| | 2 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Exhaust has part of the system missing |7.1.1a| | 2 |
| Offside Front Direction indicators not working |1.5.1c| | 2 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Front Headlamp aim not tested (4.1.2 (b)) | 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 Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 2 |
| Nearside Drive chain excessively loose |6.2.1d| | 2 |
| Rear Wheel fixing loose (single fixing) (5.2.1 (a) (ii)) | 2 |
| Offside Front Brake disc contaminated (1.1.14 (b)) | 2 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 2 |
| Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Nearside Front Direction indicator not working |4.4.1 |a| |ii|| | 2 |
| Nearside Footrest insecure |6.2.1a| | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Nearside Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Offside Rear Footrest missing (6.2.12 (a)) | 2 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Nearside Handlebar restricted in free movement from lock to lock (2.1.4 (c)) | 2 |
| Offside Handlebar restricted in free movement from lock to lock (2.1.4 (c)) | 2 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |