| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 136 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 63 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 41 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 33 |
| Registration plate issues | 32 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 30 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 29 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 29 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 28 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 25 |
| Horn not working |1.7.3a| | 18 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 16 |
| Drive chain excessively loose |6.2.1d| | 15 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 15 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 15 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 14 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 14 |
| Drive chain worn to excess |6.2.1e| | 13 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 12 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 12 |
| Rear reflector on motorcycle missing |1.4.1| | 9 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 9 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 8 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 8 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 8 |
| Rear Brake excessively binding (1.2.1 (f)) | 8 |
| Rear Brake disc|s| cracked |3.2.A1g| | 7 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 7 |
| Offside Front Footrest insecure |6.2.1a| | 7 |
| Throttle operating incorrectly |6.2.1f| | 7 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 7 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 7 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 6 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 6 |
| Nearside Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Nearside Front Footrest insecure |6.2.1a| | 6 |
| Nearside Front Direction indicator not working |1.5.1c| | 6 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 5 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| 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| | 5 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Steering headbearing has excessive free play |2.2.2| | 5 |
| Nearside Rear Direction indicator not working |1.5.1c| | 5 |
| Drive chain excessively tight |6.2.1d| | 5 |
| Front Brake excessively binding (1.2.1 (f)) | 5 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Nearside Rear Direction indicators not working |1.5.1c| | 4 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 4 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Front suspension has inadequate damping effect. |2.3.6c| | 4 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Rear Position lamp not working |4.2.1 |a|| | 3 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Rear reflector missing |4.8.2 |a| |ii|| | 3 |
| Offside 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 |
| Rear Brake hose leaking fluid |3.2.B4| | 3 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Offside Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 3 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Offside Rear Direction indicator not working |1.5.1c| | 3 |
| Rear Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 3 |
| Fuel system component insecure |7.2.1b| | 3 |
| Fuel system component leaking |7.2.1a| | 3 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 3 |
| An item not tested |Manual| | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Rear Brake excessively binding |1.2.1 |f|| | 3 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 3 |
| Rear Drive chain excessively loose |6.2.1d| | 3 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Horn not working (7.7 (a) (ii)) | 3 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 3 |