| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 83 |
| Registration plate issues | 44 |
| Rear reflector missing (4.8.2 (a) (ii)) | 21 |
| Registration plate lamp issues | 21 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 20 |
| Rear reflector on motorcycle missing |1.4.1| | 20 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 16 |
| Drive chain excessively loose |6.2.1d| | 16 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 13 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 10 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 9 |
| Rear reflector missing |4.8.2 |a| |ii|| | 8 |
| Front Brake excessively binding (1.2.1 (f)) | 8 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 8 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 8 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 8 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 7 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 7 |
| Horn not working (7.7 (a)) | 7 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 7 |
| Rear Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 7 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 7 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 6 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 6 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 6 |
| Stop lamp remains on when the brakes are released | 6 |
| Horn not working |7.7 |a| |ii|| | 6 |
| Horn not working (7.7 (a) (ii)) | 6 |
| Drive chain worn to excess |6.2.1e| | 5 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 5 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 5 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 5 |
| Stop lamp not working |4.3.1 |a| |ii|| | 5 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Nearside Rear Footrest missing |6.2.1a| | 4 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 4 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 4 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 4 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 4 |
| Handlebar deformed |2.1.1b| | 4 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 3 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 3 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| 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| | 3 |
| Headlamp light source and lamp not compatible (4.1.4 (c)) | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 3 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Offside Rear Footrest missing |6.2.1a| | 3 |
| 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|| | 3 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Front Brake excessively binding |1.2.1 |f|| | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 2 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 2 |
| Front Brake disc contaminated (1.1.14 (b)) | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 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 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Rear Brake grabbing severely |1.2.1 |c|| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear Brake excessively binding (1.2.1 (f)) | 2 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 2 |
| Drive chain worn to excess seized links (6.1.7 (c) (i)) | 2 |
| Front Position lamp not working (4.2.1 (a)) | 2 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 2 |
| Exhaust system insecure (6.1.2 (a)) | 2 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear Position lamp not working |4.2.1 |a|| | 2 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 2 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 2 |
| Drive chain excessively tight |6.1.7 |k| |i|| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 2 |
| Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 2 |
| Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 2 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Rear Roller brake test indicates a severely juddering brake |3.3.A1b| | 2 |
| Rear Brake disc|s| cracked |3.2.A1g| | 2 |
| Rear Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 2 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 2 |
| Handlebar deformed to the extent that steering is affected |2.2.1 |c| |ii|| | 2 |
| Offside Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 2 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Horn not working |1.7.3a| | 2 |