| Most common failures | No# failures |
|---|
| Registration plate issues | 42 |
| Headlamp aim out of alignment | 41 |
| Front wheel bearings have excessive free play |2.3.5b| | 29 |
| Front wheel bearings are excessively rough |2.3.5b| | 28 |
| Rear reflector on motorcycle missing |1.4.1| | 24 |
| Horn not working |1.7.3a| | 23 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 19 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 19 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Headlamp aim beam image kick up to the offside |1.6| | 13 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 11 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 11 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 9 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 8 |
| Drive chain excessively tight |6.2.1d| | 8 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 7 |
| Drive chain excessively loose |6.2.1d| | 7 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 6 |
| Registration plate lamp issues | 6 |
| Nearside Rear Direction indicators not working |1.5.1c| | 5 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 5 |
| Rear reflector missing (4.8.2 (a) (ii)) | 5 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 5 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 4 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Offside Front Brake disc|s| excessively worn |3.2.A1l| | 4 |
| Riders seat insecure |6.2.1a| | 4 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Rear reflector on motorcycle missing (1.4.1) | 4 |
| Front position lamp incorrect colour |1.1.2a| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 3 |
| Offside Front Footrest insecure |6.2.1a| | 3 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 3 |
| Front Brake excessively binding (1.2.1 (f)) | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Nearside Front Direction indicator not working |4.4.1 |a| |ii|| | 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 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 3 |
| Nearside Front Direction indicators not working |1.5.1c| | 3 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Rear Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 2 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 2 |
| Front Brake excessively binding |1.2.1 |f|| | 2 |
| Brake pedal cannot be applied smoothly |3.1.3d| | 2 |
| Brake pedal cannot be released smoothly |3.1.3d| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| Offside Front Direction indicator not working |4.4.1 |a| |ii|| | 2 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Riders seat insecure (6.2.5 (a) (ii)) | 2 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 2 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |
| Front Headlamp aim beam image kick up to the offside (1.6) | 2 |
| Front wheel bearings are excessively rough (2.3.5b) | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Front Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition |8.1.1 |a|| | 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 |
| Front position lamp missing |1.1.1a| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 2 |