| Most common failures | No# failures |
|---|
| Registration plate issues | 91 |
| Rear reflector on motorcycle missing |1.4.1| | 69 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 33 |
| Horn not working |1.7.3a| | 29 |
| Headlamp aim out of alignment | 19 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 19 |
| Rear reflector missing (4.8.2 (a) (ii)) | 16 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 15 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Front wheel bearings have excessive free play |2.3.5b| | 11 |
| Horn missing |1.7.1| | 10 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 10 |
| Horn not working |7.7 |a| |ii|| | 7 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 6 |
| Rear reflector missing |4.8.2 |a| |ii|| | 6 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 6 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 5 |
| Steering headbearing has excessive free play |2.2.2| | 5 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Horn not working (7.7 (a) (ii)) | 5 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 4 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 4 |
| Stop lamp remains on when the brakes are released | 4 |
| Front wheel bearings are excessively rough |2.3.5b| | 4 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Headlamp aim not tested |1.6| | 3 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Drive chain excessively loose |6.2.1d| | 2 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Rear Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 2 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Horn not working (7.7 (a)) | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Headlamp aim not tested |4.1.2 |b|| | 2 |
| Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 2 |
| Nearside Rear Wheel spoke excessively loose |4.2.1b| | 2 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Front Position lamp not working |4.2.1 |a|| | 2 |
| Rear Brake has no recorded effort at a wheel |1.2.1 |a| |ii|| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 2 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Horn control defective |1.7.2a| | 2 |
| Rear reflector on motorcycle missing (1.4.1) | 2 |
| Front Position lamp missing (4.2.1 (a)) | 1 |
| Front Brake caliper insecurely mounted and braking performance affected caliper sliding rubbers missing (1.1.16 (c) (ii)) | 1 |
| Rear Brake caliper insecurely mounted and braking performance affected caliper sliding rubbers missing (1.1.16 (c) (ii)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Rear Rear position lamp incorrect colour |1.1.2b| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Centre Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Stop lamp does not illuminate by the operation of both brake controls front brake (4.3.2 (a) (iii)) | 1 |
| Registration plate lamp issues | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Centre Rear Rear reflector on sidecar missing |1.4.1| | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Centre Rear Rear position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Nearside Front Horn missing |1.7.1| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Headlamp at least one does not illuminate on dipped beam high beam. |1.2.2a|i|| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Front Brake lever has insufficient reserve travel |1.1.2 |a|| | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 1 |
| Front Horn missing |1.7.1| | 1 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| All direction indicators missing switch fitted (4.4.1 (a) (ii)) | 1 |
| Rear Direction indicator missing |1.5.1a| | 1 |
| Nearside Steering lock stop missing |2.1.3| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Central Front Lower Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Central Rear Lower Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Central Front Upper Horn not working |1.7.3a| | 1 |
| Offside Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Front position lamp does not illuminate immediately when switched on low beam not working |1.1.3a| | 1 |
| Rear Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Nearside Footrest insecure split pin missing |6.2.1a| | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| All position lamps not working rear (4.2.1 (a)) | 1 |
| Steering lock stop missing |2.1.3| | 1 |
| Rear Lower Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Centre Rear Horn missing |1.7.1| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Position lamp not working |4.2.1 |a|| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride split link |6.2.1h| | 1 |
| Position lamp switch insecure |1.1.4b| | 1 |
| Position lamp switch faulty |1.1.4a| | 1 |
| Rear Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Front Steering lock stop maladjusted |2.1.3| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Front Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 1 |
| Front Exhaust mounting missing |7.1.1c| | 1 |
| Nearside Footrest insecure SPLIT PIN MISSING FROM RETAINING PIN |6.2.12 |a|| | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Front Brake disc(s) is excessively distorted (3.2.A1m) | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Rear Wheel spindle loose (5.2.1 (c) (i)) | 1 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Front Shock absorber has a serious fluid leak BOTH |5.3.2 |b|| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Horn emits 2 or more alternating tones |1.7.3b| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Central Front Upper Headlamp aim not tested (4.1.2 (b)) | 1 |
| Offside Rear Lower Brake disc in such a condition that it is seriously weakened (1.1.14 (a) (ii)) | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Fuel tank leaking FUEL TAP (6.1.3 (b) (i)) | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Wheel spoke missing |5.2.2 |d|| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Fuel hose leaking |7.2.1a| | 1 |
| Rear Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 1 |
| Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Headlamp missing (4.1.1 (a) (ii)) | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Stop lamp not working with foot brake (4.3.1 (a) (ii)) | 1 |