| Most common failures | No# failures |
|---|
| Registration plate lamp issues | 93 |
| Rear reflector missing (4.8.2 (a) (ii)) | 88 |
| Registration plate issues | 81 |
| Headlamp aim out of alignment | 70 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 37 |
| Rear reflector missing |4.8.2 |a| |ii|| | 27 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 16 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 14 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 13 |
| 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)) | 13 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 13 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 12 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 11 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 11 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 11 |
| Offside Rear Footrest missing (6.2.12 (a)) | 11 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 9 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 8 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 8 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 7 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 7 |
| Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 7 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 6 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 6 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 6 |
| 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|| | 5 |
| Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 5 |
| Rear Brake excessively binding (1.2.1 (f)) | 5 |
| Front Brake excessively binding (1.2.1 (f)) | 5 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 5 |
| Drive chain excessively loose |6.2.1d| | 5 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 5 |
| Rear reflector on motorcycle missing |1.4.1| | 5 |
| Offside Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 5 |
| Rear All direction indicators obviously incorrectly positioned (4.4.3 (a)) | 4 |
| Rear Footrest missing (6.2.12 (a)) | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 4 |
| Front Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 4 |
| Offside Rear Footrest missing |6.2.12 |a|| | 4 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 4 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 4 |
| Horn not working (7.7 (a)) | 4 |
| Nearside Front Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 4 |
| Offside Front Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 4 |
| Nearside Rear Drive chain excessively loose (6.1.7 (c) (i)) | 4 |
| Front Brake grabbing severely (1.2.1 (c)) | 4 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 4 |
| Stop lamp remains on when the brakes are released | 4 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 3 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 3 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 3 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 3 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 3 |
| Central Rear Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Front Position lamp not working (4.2.1 (a)) | 3 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 3 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 3 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 3 |
| Nearside Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 3 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 3 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Nearside Rear All direction indicators not working (4.4.1 (a) (ii)) | 2 |
| Rear Stop lamp adversely affected by the operation of another lamp (4.3.3 (b)) | 2 |
| Rear Direction indicator adversely affected by the operation of another lamp (4.4.3 (b)) | 2 |
| Rear Drive chain excessively tight (6.1.7 (k) (i)) | 2 |
| Rear Direction indicator obviously incorrectly positioned |4.4.3 |a|| | 2 |
| All direction indicators adversely affected by the operation of another lamp (4.4.3 (b)) | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Rear Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Footrest missing Pillion (6.2.12 (a)) | 2 |
| Riders seat insecure (6.2.5 (a) (ii)) | 2 |
| Exhaust system insecure (6.1.2 (a)) | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 2 |
| Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 2 |
| Front Horn not working (7.7 (a)) | 2 |
| Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 2 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 2 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 2 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 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 |
| Nearside Footrest insecure (6.2.12 (a)) | 2 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 2 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Handlebar mounting insecure (2.2.1 (a) (i)) | 2 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Offside Rear Footrest insecure (6.2.12 (a)) | 2 |
| Drive chain excessively tight |6.1.7 |k| |i|| | 2 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 2 |
| Stop lamp adversely affected by the operation of another lamp (4.3.3 (b)) | 2 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |