| Most common failures | No# failures |
|---|
| Registration plate lamp issues | 94 |
| Headlamp aim out of alignment | 90 |
| Rear reflector missing (4.8.2 (a) (ii)) | 46 |
| Rear reflector missing |4.8.2 |a| |ii|| | 33 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 28 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 24 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 19 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 18 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 17 |
| Rear Position lamp not working (4.2.1 (a)) | 16 |
| Front Position lamp not working (4.2.1 (a)) | 16 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 14 |
| Registration plate issues | 14 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 13 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 13 |
| Headlamp aim not tested (4.1.2 (b)) | 13 |
| Rear Brake excessively binding (1.2.1 (f)) | 12 |
| Front Position lamp not working |4.2.1 |a|| | 12 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 12 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 11 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 11 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 11 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 11 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 11 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 11 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 10 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 10 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 10 |
| Rear Position lamp not working |4.2.1 |a|| | 10 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 10 |
| Front Brake excessively binding (1.2.1 (f)) | 9 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 9 |
| Stop lamp remains on when the brakes are released | 9 |
| Horn not working |7.7 |a| |ii|| | 9 |
| Rear Brake excessively binding |1.2.1 |f|| | 8 |
| Horn not working (7.7 (a)) | 7 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 7 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 7 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 7 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 6 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 6 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 6 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 6 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 6 |
| Rear Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 6 |
| Horn not working (7.7 (a) (ii)) | 6 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 6 |
| Brake hose damaged | 5 |
| Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Rear Brake disc fractured (1.1.14 (a) (ii)) | 5 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 5 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 5 |
| Central Rear Rear reflector missing |4.8.2 |a| |ii|| | 5 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 5 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 5 |
| Rear Shock absorber has an excessively worn bush (5.3.2 (c)) | 5 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 4 |
| Brake performance not tested (1.2.1 (g)) | 4 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 4 |
| Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 4 |
| 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)) | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 4 |
| Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 4 |
| Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 4 |
| Nearside Rear Footrest missing |6.2.12 |a|| | 4 |
| All direction indicators not working (4.4.1 (a) (ii)) | 4 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 4 |
| Headlamp aim not tested |4.1.2 |b|| | 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 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 3 |
| Front Headlamp aim not tested (4.1.2 (b)) | 3 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 3 |
| Rear Shock absorber has an excessively worn bush |5.3.2 |c|| | 3 |
| Rear Lower Shock absorber has an excessively worn bush |5.3.2 |c|| | 3 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 3 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Front Brake has no recorded effort at a wheel (1.2.1 (a) (ii)) | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 3 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 3 |
| Nearside Front Direction indicator not working |4.4.1 |a| |ii|| | 3 |
| Headlamp insecure (4.1.1 (c)) | 3 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 3 |
| Front Brake excessively binding |1.2.1 |f|| | 3 |
| Front Headlamp insecure (4.1.1 (c)) | 3 |
| Front Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 3 |
| Front Valve stem seriously damaged |5.2.3 |j|| | 3 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 3 |
| Central Rear Position lamp not working (4.2.1 (a)) | 3 |
| Headlamp light intensity severely reduced (4.1.4 (a)) | 3 |
| Drive chain excessively tight |6.1.7 |k| |i|| | 3 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 3 |
| Rear Brake pedal is bent and the brake cannot be readily applied (1.1.2 (d)) | 2 |
| Rear Brake hose damaged and likely to fail |1.1.12 |a|| | 2 |
| Front Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 2 |
| Offside Rear Direction indicator with a multiple light source more than 1/2 not functioning (4.4.1 (a) (ii)) | 2 |
| Headlamp incorrect colour (4.1.4 (a)) | 2 |
| Front Headlamp light intensity severely reduced (4.1.4 (a)) | 2 |
| Front Brake disc contaminated (1.1.14 (b)) | 2 |
| Rear 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 |
| Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 2 |
| Rear reflector missing obscured by L plate |4.8.2 |a| |ii|| | 2 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 2 |
| Offside Front Footrest insecure |6.2.12 |a|| | 2 |
| Rear Position lamp light intensity significantly reduced |4.2.3 |a| |ii|| | 2 |
| Rear Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Rear Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 2 |
| Rear Brake has no recorded effort at a wheel (1.2.1 (a) (ii)) | 2 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Rear brake disc in such a condition that it is seriously weakened | 2 |
| Rear Drive chain worn to excess (6.1.7 (c) (i)) | 2 |
| Rear Brake disc fractured |1.1.14 |a| |ii|| | 2 |
| Rear Drive chain sprocket so worn it is likely to fail |6.1.7 |c| |ii|| | 2 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Drive chain excessively loose |6.2.1d| | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Position lamp not working (4.2.1 (a)) | 2 |
| Rear Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 2 |
| Offside Rear Footrest missing |6.2.12 |a|| | 2 |
| Front Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 2 |
| Front Brake disc fractured (1.1.14 (a) (ii)) | 2 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 2 |
| Front Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 2 |
| Rear Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 2 |
| Rear Brake master cylinder insecure (1.1.10 (c)) | 2 |
| Front Brake fluid contaminated |1.8 |a|| | 2 |
| Rear Brake fluid contaminated |1.8 |a|| | 2 |
| Rear Brake master cylinder insecure |1.1.10 |c|| | 2 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 2 |
| Nearside Rear Direction indicator light intensity significantly reduced (4.4.3 (a)) | 2 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 2 |
| Rear Brake fluid contaminated (1.8 (a)) | 2 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 2 |
| Front Brake lever is so short that the brake cannot be readily applied (1.1.2 (d)) | 2 |
| Central Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Exhaust system insecure |6.1.2 |a|| | 2 |
| Front Position lamp missing (4.2.1 (a)) | 2 |
| Central Rear Inner Shock absorber has an excessively worn bush excessive play in rear lower suspension bush |5.3.2 |c|| | 2 |
| Rear Drive chain sprocket excessively loose (6.1.7 (c) (i)) | 2 |
| Throttle operating incorrectly |6.2.7 |a| |i|| | 2 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 2 |