| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 119 |
| Registration plate issues | 63 |
| Rear reflector on motorcycle missing |1.4.1| | 47 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 39 |
| Drive chain excessively loose |6.2.1d| | 19 |
| Rear reflector missing (4.8.2 (a) (ii)) | 17 |
| Drive chain worn to excess |6.2.1e| | 14 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 12 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 11 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Drive chain excessively tight |6.2.1d| | 10 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 9 |
| Headlamp aim beam image kick up to the offside |1.6| | 9 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 8 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 8 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 7 |
| Front Wheel spoke excessively loose |4.2.1b| | 7 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 7 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 7 |
| Front Position lamp not working (4.2.1 (a)) | 7 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 7 |
| Front Brake excessively binding (1.2.1 (f)) | 7 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 6 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 6 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Nearside Front Direction indicators not working |1.5.1c| | 5 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear reflector missing |4.8.2 |a| |ii|| | 5 |
| Throttle operating incorrectly |6.2.1f| | 5 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 5 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 5 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 5 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 5 |
| Horn not working (7.7 (a)) | 5 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Rear Drive chain worn to excess |6.2.1e| | 4 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 4 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 4 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 4 |
| Offside Rear Direction indicator not working |1.5.1c| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 4 |
| Rear Brake excessively binding (1.2.1 (f)) | 4 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 4 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 3 |
| Rear Drive chain excessively loose |6.2.1d| | 3 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 3 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 3 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Exhaust excessively deteriorated |7.1.1a| | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Horn not working |1.7.3a| | 3 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 3 |
| Nearside Front Direction indicator not working |1.5.1c| | 3 |
| Offside Front Direction indicators not working |1.5.1c| | 3 |
| Offside Rear Direction indicators not working |1.5.1c| | 3 |
| Nearside Rear Direction indicators not working |1.5.1c| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 3 |
| Front Brake disc|s| cracked |3.2.A1g| | 2 |
| Brake performance not tested |3.3| | 2 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 2 |
| 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| | 2 |
| Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 2 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear mono-shock pivot seized |2.4.B.4| | 2 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Fuel system component leaking |7.2.1a| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride split pins missing from handlebar clamps |6.2.1h| | 2 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 2 |
| Exhaust mounting missing |7.1.1c| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Nearside Direction indicators not working |1.5.1c| | 2 |
| Rear 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| | 2 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Rear position lamp insecure |1.1.1c| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 2 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear Lower Shock absorber has an excessively worn bush (5.3.2 (c)) | 2 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |