| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 70 |
| Rear reflector missing (4.8.2 (a) (ii)) | 50 |
| Headlamp aim out of alignment | 35 |
| Registration plate issues | 33 |
| Rear reflector missing |4.8.2 |a| |ii|| | 29 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 21 |
| Registration plate lamp issues | 20 |
| Rear Brake excessively binding (1.2.1 (f)) | 18 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 18 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 17 |
| Drive chain excessively loose |6.2.1d| | 15 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 14 |
| Drive chain worn to excess |6.2.1e| | 12 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 12 |
| Stop lamp remains on when the brakes are released | 11 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 11 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 11 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 10 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 7 |
| Horn not working |1.7.3a| | 7 |
| Steering headbearing has excessive free play |2.2.2| | 7 |
| Rear Brake excessively binding |1.2.1 |f|| | 7 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 7 |
| Horn not working (7.7 (a) (ii)) | 7 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 7 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 6 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 6 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 6 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 6 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 6 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 5 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 5 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 5 |
| Front Brake excessively binding (1.2.1 (f)) | 5 |
| Rear Footrest missing (6.2.12 (a)) | 5 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 5 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 5 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 5 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 4 |
| Rear Footrest missing |6.2.1a| | 4 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 4 |
| Offside Rear Direction indicators not working |1.5.1c| | 4 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 4 |
| Headlamp aim not tested (4.1.2 (b)) | 4 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 4 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 4 |
| Front Position lamp not working (4.2.1 (a)) | 4 |
| Horn not working (7.7 (a)) | 4 |
| Exhaust silencer likely to become detached |8.1.1 |b| |ii|| | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Central Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 3 |
| Horn missing |1.7.1| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Nearside Rear Footrest missing |6.2.1a| | 3 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 3 |
| Offside Front Direction indicators not working |1.5.1c| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Rear Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 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 |
| 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 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| All direction indicators not working (4.4.1 (a) (ii)) | 3 |
| Front Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 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 |
| Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Stop lamp does not illuminate immediately a brake applies front lever |1.3.1a| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Nearside Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 2 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 2 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 2 |
| Nearside Rear Footrest missing |6.2.12 |a|| | 2 |
| Offside Rear Footrest missing |6.2.12 |a|| | 2 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 2 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 2 |
| Central Rear Lower Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Exhaust system insecure |6.1.2 |a|| | 2 |
| Rear Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 2 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 2 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 2 |
| Clutch lever shortened so it cannot be readily operated (6.2.7 (b)) | 2 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 2 |
| Offside Rear Footrest missing (6.2.12 (a)) | 2 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 2 |
| Front Brake grabbing severely (1.2.1 (c)) | 2 |
| Front Brake component inadequately mounted Front disc not fitted correctly (direction wrong) (1.1.21 (c)) | 2 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |
| Chain guard insecure (6.1.7 (i)) | 2 |
| Rear Pillion seat insecure (6.2.6 (a) (ii)) | 2 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 2 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 2 |
| Rear Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 2 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Rear Drive chain sprocket excessively loose (6.1.7 (c) (i)) | 2 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |