| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 19 |
| Front wheel bearings have excessive free play |2.3.5b| | 11 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 9 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 8 |
| Front wheel bearings are excessively rough |2.3.5b| | 7 |
| Registration plate issues | 6 |
| Nearside Rear Direction indicator not working |1.5.1c| | 6 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Nearside Front Direction indicator not working |1.5.1c| | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Horn not working |1.7.3a| | 3 |
| Offside Rear 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 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 3 |
| Rear reflector on motorcycle missing |1.4.1| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Horn sounds harsh or grating |1.7.3c| | 3 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 2 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Front Direction indicators not working |1.5.1c| | 2 |
| Rear position lamp incorrect colour |1.1.2b| | 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 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Front Brake locking device insecure |3.2.A1e| | 1 |
| Front Brake lever attachment screws loose |3.1.2b| | 1 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Decelerometer brake test the less effective brake control does not achieve an efficiency of 25%. |3.3.E1b| | 1 |
| Rear Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Fuel cap does not fasten securely by a positive means |7.2.2b| | 1 |
| Fuel hose leaking |7.2.1a| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Riders seat insecure |6.2.1a| | 1 |
| Front Front position lamp does not illuminate immediately when switched on all mounted on carrier inopperative |1.1.3a| | 1 |
| Front Front position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Rear Built up wheel has a bolt/s missing |4.2.1c| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 1 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Front Brake drum contaminated (1.1.14 (b)) | 1 |
| Stop lamp showing white light to the rear (4.3.3 (a) (ii)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Front Direction indicator incorrect colour both |1.5.1b| | 1 |
| Centre Front Steering headbearing has excessive free play knotchy steering bearings |2.2.2| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Rear Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Front Stop lamp flickers when tapped lightly by hand |1.3.1d| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Direction indicators not working nearside front/offside rear |1.5.1c| | 1 |
| Nearside Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Throttle operating incorrectly |6.2.1f| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Front Steering headbearing has excessive free play (2.2.2) | 1 |
| Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Rear Gradient brake test indicates a sticking brake |3.3.D1c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Stop lamp adversely affected by the operation of another lamp affected by horn |4.3.3 |b|| | 1 |
| All direction indicators adversely affected by the operation of another lamp affected by horn |4.4.3 |b|| | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Rear Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Front Brake cable has a significantly damaged outer casing. |3.2.A1b| | 1 |
| Front Steering lock stop ineffective |2.1.3| | 1 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Nearside Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Rear Brake performance not tested (1.2.1 (g)) | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Rear wheel has a missing wheel nut|s| |4.2.3a| | 1 |
| Centre Front Upper Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Indicator tell tale not operating correctly |1.5.2| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Headlamp main beam affected by the operation of the horn |1.2.2c| | 1 |
| Headlamp dipped beam affected by the operation of the horn |1.2.2c| | 1 |
| Rear position lamp adversely affected by the operation of the horn |1.1.3b| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Front Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Lower Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Steering headbearing has excessive wear or free play steering head bearings notched |2.2.2 |f| |i|| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |