| Most common failures | No# failures |
|---|
| Registration plate lamp issues | 278 |
| Headlamp aim out of alignment | 187 |
| Registration plate issues | 147 |
| Rear reflector missing (4.8.2 (a) (ii)) | 102 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 93 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 82 |
| Front Brake excessively binding (1.2.1 (f)) | 78 |
| Rear Brake excessively binding (1.2.1 (f)) | 55 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 52 |
| Rear reflector missing |4.8.2 |a| |ii|| | 42 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 42 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 41 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 39 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 37 |
| 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)) | 37 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 36 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 31 |
| Horn not working (7.7 (a)) | 30 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 29 |
| Stop lamp remains on when the brakes are released | 25 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 24 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 23 |
| 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|| | 22 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 21 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 18 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 18 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 18 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 17 |
| Drive chain excessively loose |6.2.1d| | 17 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 16 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 15 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 15 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 15 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 15 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 14 |
| Rear Position lamp not working (4.2.1 (a)) | 14 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 14 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 14 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 14 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 12 |
| Rear reflector on motorcycle missing |1.4.1| | 12 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 12 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 12 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 12 |
| Horn not working (7.7 (a) (ii)) | 12 |
| Offside Handlebar excessively deformed (2.2.1 (c) (i)) | 12 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 11 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 11 |
| Front Brake excessively binding |1.2.1 |f|| | 11 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 11 |
| Front Brake grabbing severely (1.2.1 (c)) | 11 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 11 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 11 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 10 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 10 |
| Rear Brake excessively binding |1.2.1 |f|| | 10 |
| Horn not working |7.7 |a| |ii|| | 10 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 10 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 9 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 9 |
| Stop lamp not working (4.3.1 (a) (ii)) | 9 |
| Nearside Rear Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 9 |
| All direction indicators not working (4.4.1 (a) (ii)) | 9 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 8 |
| Offside Handlebar fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 8 |
| Offside Front Position lamp not working (4.2.1 (a)) | 8 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 8 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 8 |
| Rear Drive chain excessively loose (6.1.7 (c) (i)) | 8 |
| Offside Front Direction indicator not working |4.4.1 |a| |ii|| | 7 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 7 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 7 |
| Brake performance not tested (1.2.1 (g)) | 7 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 7 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 7 |
| Drive chain worn to excess |6.2.1e| | 7 |
| Rear Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 7 |
| Front Brake fluid reservoir fluid level significantly below minimum level (1.1.10 (d) (ii)) | 7 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 7 |