| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 41 |
| Registration plate lamp issues | 12 |
| Horn not working |1.7.3a| | 9 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Registration plate issues | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Drive chain excessively loose |6.2.1d| | 4 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Offside Rear Footrest insecure |6.2.1a| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Plate brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.B2b| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Rear Brake pedal insecure |3.1.2a| | 1 |
| Rear Valve stem seriously misaligned |5.2.3 |j|| | 1 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Nearside Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Nearside Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Offside Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Central Rear Lower Stop lamp not working foot brake |4.3.1 |a| |ii|| | 1 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Rear position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Front Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Rear Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Rear Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Steering operation impeded by a fairing (2.1.4 (e)) | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Front Brake lever so insecure that the brake cannot be readily applied brake lever damaged (1.1.2 (e) (ii)) | 1 |
| Rear Lower Shock absorber has an excessively worn bush shock bush worn to excess (5.3.2 (c)) | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Handlebar restricted in free movement from lock to lock (2.1.4 (c)) | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Indicator switch does not operate the direction indicators on the side selected |1.5.4| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Nearside Rear Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Offside Rear Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Rear Brake disc|s| cracked |3.2.A1g| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Nearside Rear Footrest insecure (6.2.12 (a)) | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Front Brake disc|s| excessively pitted |3.2.A1l| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Stop lamp does not illuminate immediately a brake applies front lever |1.3.1a| | 1 |
| Rear Brake pipe union leaking fluid |3.2.B4| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Front Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Rear Stop lamp switch with a delay in operation Rear stop light switch sticking on (4.3.2 (a) (ii)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Suspension component ball joint excessively worn dog bone link (5.3.4 (a) (i)) | 1 |
| Rear suspension bearing has excessive free play All linkage bearings have excessive play. |2.4.A2a|i|| | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Drive chain sprocket so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Lower Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |
| Rear Brake pedal is bent and the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Front Motorcycle structure joining/attachment plate or fastening insecure missing locking nut from clutch pivot |6.1.1 |b| |i|| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Rear Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Stop lamp not working front (4.3.1 (a) (ii)) | 1 |
| Suspension arm mounting has an unsafe modification rear suspension seized (5.3.3 (c) (i)) | 1 |
| Handlebar excessively deformed (2.2.1 (c) (i)) | 1 |
| Nearside Front All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Front Decelerometer brake test indicates a binding brake |3.3.E1d| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 1 |
| Front All direction indicators incorrect colour (4.4.3 (a)) | 1 |
| Rear All direction indicators incorrect colour (4.4.3 (a)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |