| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 118 |
| Headlamp aim out of alignment | 107 |
| Drive chain excessively loose |6.2.1d| | 65 |
| Registration plate issues | 65 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 46 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 40 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 40 |
| Drive chain worn to excess |6.2.1e| | 36 |
| Horn not working |1.7.3a| | 33 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 32 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 31 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 29 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 28 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 28 |
| Offside Rear Footrest missing |6.2.1a| | 26 |
| Drive chain excessively tight |6.2.1d| | 22 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 20 |
| Nearside Direction indicators flashing more than 120 times per minute |1.5.1c| | 19 |
| Nearside Rear Footrest missing |6.2.1a| | 17 |
| Rear reflector on motorcycle obscured |1.4.1| | 16 |
| Front wheel bearings have excessive free play |2.3.5b| | 15 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 15 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 13 |
| Indicator switch insecure |1.5.4| | 13 |
| Headlamp aim beam image kick up to the offside |1.6| | 13 |
| Rear reflector missing (4.8.2 (a) (ii)) | 13 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 12 |
| Rear Footrest missing |6.2.1a| | 12 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 12 |
| Offside Handlebar mounting clamp bolt loose |2.1.1a| | 11 |
| Registration plate lamp issues | 11 |
| Horn not working (7.7 (a) (ii)) | 11 |
| Nearside Front Direction indicator insecure |1.5.3b| | 10 |
| Steering headbearing has excessive free play |2.2.2| | 10 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 10 |
| Nearside Front Direction indicator not working |1.5.1c| | 9 |
| Fuel system component insecure |7.2.1b| | 9 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 9 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 9 |
| Front position lamp incorrect colour |1.1.2a| | 9 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 9 |
| Offside Direction indicators flashing more than 120 times per minute |1.5.1c| | 9 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 9 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 9 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 8 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 8 |
| Nearside Handlebar deformed |2.1.1b| | 8 |
| Nearside Front Direction indicators not working |1.5.1c| | 8 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 8 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 8 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 8 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 7 |
| Front wheel bearings are excessively rough |2.3.5b| | 7 |
| 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| | 7 |
| Offside Front Direction indicators not working |1.5.1c| | 7 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 7 |
| Rear Position lamp not working (4.2.1 (a)) | 7 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 7 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Rear Drive chain excessively loose |6.2.1d| | 6 |
| Nearside Handlebar mounting clamp bolt loose |2.1.1a| | 6 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 6 |
| Front Brake excessively binding |1.2.1 |f|| | 6 |
| Offside Front Direction indicator missing |1.5.1a| | 6 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 6 |
| Throttle operating incorrectly |6.2.1f| | 6 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 6 |
| Offside Handlebar deformed |2.1.1b| | 5 |
| Offside Front Footrest insecure |6.2.1a| | 5 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 5 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 5 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 5 |
| Rear reflector missing |4.8.2 |a| |ii|| | 5 |
| Nearside Rear Direction indicators not working |1.5.1c| | 5 |
| Rear Brake excessively binding |1.2.1 |f|| | 5 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 5 |
| Nearside Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 5 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 5 |
| Nearside Rear Direction indicator not working |1.5.1c| | 5 |
| Rear position lamp insecure |1.1.1c| | 5 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 5 |
| All direction indicators not working (4.4.1 (a) (ii)) | 5 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 4 |
| Front Brake disc|s| insecure |3.2.A1g| | 4 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 4 |
| Handlebar mounting clamp loose |2.1.1a| | 4 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 4 |
| Brake pedal insecure |3.1.2a| | 4 |
| Offside Front Direction indicator not working |1.5.1c| | 4 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Nearside Front Direction indicator missing |1.5.1a| | 4 |
| Headlamp insecure |1.2.3b| | 4 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Headlamp switch insecure |1.2.4| | 4 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 4 |
| Offside Footrest insecure |6.2.1a| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 4 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 4 |
| Front Brake excessively binding (1.2.1 (f)) | 4 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Horn not working (7.7 (a)) | 4 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 3 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Rear reflector on motorcycle obscured |1.4.2b| | 3 |
| Offside Rear Drive chain excessively loose |6.2.1d| | 3 |
| Nearside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 3 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 3 |
| Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 3 |
| Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 3 |
| Brake pedal pivots excessively worn |3.1.3a| | 3 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 3 |
| Offside Fairings insecure and likely to impede the steering |2.1.2e| | 3 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 3 |
| Nearside Fairings insecure and likely to impede the steering |2.1.2e| | 3 |
| Exhaust excessively deteriorated |7.1.1a| | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Offside Rear Direction indicators not working |1.5.1c| | 3 |
| Exhaust mounting missing |7.1.1c| | 3 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 3 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 3 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 3 |
| Nearside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 3 |
| Offside Front Fairings insecure and likely to impede the steering |2.1.2e| | 3 |
| Front Steering headbearing has excessive free play |2.2.2| | 3 |
| Rear Footrest missing |6.2.12 |a|| | 3 |
| Nearside Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 3 |
| Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 3 |
| Nearside Handlebar mounting clamp loose |2.1.1a| | 3 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Nearside Rear Footrest missing |6.2.12 |a|| | 3 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 3 |
| Drive chain fouling another component |6.2.1d| | 3 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 3 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 3 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 3 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 3 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 3 |
| Offside Rear Footrest missing (6.2.12 (a)) | 3 |
| Fuel tank insecure (6.1.3 (a) (i)) | 3 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |