| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 104 |
| Rear reflector on motorcycle missing |1.4.1| | 29 |
| Headlamp aim beam image kick up to the offside |1.6| | 28 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 23 |
| Registration plate issues | 22 |
| Drive chain excessively loose |6.2.1d| | 15 |
| Drive chain worn to excess |6.2.1e| | 11 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 10 |
| Rear reflector missing (4.8.2 (a) (ii)) | 10 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 9 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 7 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 6 |
| Drive chain excessively tight |6.2.1d| | 6 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 5 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 5 |
| Horn not working |1.7.3a| | 5 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 5 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 5 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Horn not working |7.7 |a| |ii|| | 4 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 4 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 4 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Front Roller brake test indicates a binding brake (3.3.A1a) | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 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 |
| Nearside Rear Direction indicators not working |1.5.1c| | 3 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 3 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Front Brake excessively binding (1.2.1 (f)) | 3 |
| Horn not working (7.7 (a)) | 3 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Rear Rear mono-shock pivot excessively worn |2.4.B.4| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Front Brake excessively binding |1.2.1 |f|| | 2 |
| Centre Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Fuel pipe leaking |7.2.1a| | 2 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Nearside Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 2 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Rear Exhaust excessively deteriorated |7.1.1a| | 2 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 2 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Wheel spoke excessively loose |4.2.1b| | 2 |
| Rear Wheel spoke excessively loose |4.2.1b| | 2 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 2 |
| Lower Rear suspension bearing has excessive free play |2.4.A2a|i|| | 2 |
| Rear position lamp insecure |1.1.1c| | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 2 |
| Front Wheel has an excessively distorted bead rim. (4.2.2) | 2 |
| Rear Brake excessively binding (1.2.1 (f)) | 2 |
| Rear Shock absorber has an excessively worn bush (5.3.2 (c)) | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 2 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 2 |