| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 25 |
| Steering headbearing has excessive free play |2.2.2| | 22 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 22 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 19 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 16 |
| Registration plate issues | 10 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 10 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 8 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 8 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 8 |
| Throttle operating incorrectly |6.2.1f| | 7 |
| Headlamp insecure |1.2.3b| | 7 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 6 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 5 |
| Front Steering headbearing has excessive free play |2.2.2| | 5 |
| Nearside Rear Direction indicators not working |1.5.1c| | 5 |
| Rear reflector on motorcycle missing |1.4.1| | 5 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear reflector on motorcycle obscured |1.4.1| | 4 |
| Front position lamp insecure |1.1.1c| | 4 |
| Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Exhaust excessively deteriorated |7.1.1a| | 3 |
| Offside Front suspension assembly component excessively corroded. |2.3.1| | 3 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Offside Front Direction indicator not working |1.5.1c| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Rear Brake lever insecure |3.1.2a| | 3 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Rear Brake lever has insufficient reserve travel (1.1.2 (a)) | 2 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Registration plate lamp issues | 2 |
| Nearside Front suspension assembly component excessively corroded. |2.3.1| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Horn not working |1.7.3a| | 2 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Nearside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Nearside Front Front suspension assembly component excessively corroded. |2.3.1| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Rear wheel insecure |4.2.3b| | 2 |
| Rear Stop lamp missing |1.3.3a| | 1 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front Brake pipe union leaking fluid |3.2.B4| | 1 |
| Front Steering movement excessively rough with the wheel raised |2.2.1b| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Centre Headlamp insecure |1.2.3b| | 1 |
| Centre Front Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Centre Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Rear Brake lever has insufficient reserve travel |1.1.2 |a|| | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Front Brake component modification unsafe front juddering (1.1.21 (d) (i)) | 1 |
| Front Front suspension assembly component excessively bent |2.3.1| | 1 |
| Offside Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| All direction indicators adversely affected by the operation of another lamp (4.4.3 (b)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Headlamp aim not tested |4.1.2 |b|| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Fuel cap sealing washer missing |7.2.2c| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Centre Direction indicators not working |1.5.1c| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Front suspension assembly component excessively corroded. |2.3.1| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Motorcycle structure excessively distorted |6.1.1a| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Rear Brake lever mounting cracked |3.1.2c| | 1 |
| Fuel cap sealing washer torn |7.2.2c| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Nearside Direction indicator missing |1.5.1a| | 1 |
| Offside Direction indicator missing |1.5.1a| | 1 |
| Front Front position lamp insecure |1.1.1c| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Stop lamp affected by the operation of the horn |1.3.2| | 1 |
| Rear reflector on motorcycle obscured |1.4.2b| | 1 |
| Fuel cap missing |7.2.2a| | 1 |
| Nearside Front Brake lever insecure |3.1.2a| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Exhaust is leaking and excessively noisey blowing |7.1.1b| | 1 |
| Stop lamp does not illuminate immediately a brake applies front brake does not emit brake light |1.3.1a| | 1 |
| Brake lever has inadequate reserve travel rear brake |3.1.3b| | 1 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Brake cable has a significantly damaged outer casing. |3.2.A1b| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Nearside Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Nearside Rear Stop lamp missing |1.3.3a| | 1 |
| Centre Front Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Offside Rear Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Front Upper Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Nearside Fairings insecure and likely to impede the steering fairing/rear foot rest broken |2.1.2e| | 1 |
| Offside Fairings insecure and likely to impede the steering fairing / rear foot rest broken |2.1.2e| | 1 |
| Front Brake performance not tested front brake binding when rotated off the floor |3.3| | 1 |
| Rear Brake lever has inadequate reserve travel inadequate reserve travel on rear brake lever |3.1.3b| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Front Front suspension assembly excessive wear or free play in a front suspension component Front suspension forks leaking and no damping |2.3.4| | 1 |
| Rear Rear shock absorber has inadequate damping effect. shock absorber/spring seized and not operational |2.4.A.3b| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Fuel system component leaking (6.1.3 (b) (i)) | 1 |
| Rear Brake lever has abnormal movement of levers indicating excessive wear or maladjustment (1.1.15 (f)) | 1 |
| Nearside Front Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Offside Front Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Nearside Rear Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Offside Rear Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Front position lamp flickers when tapped lightly by hand |1.1.3c| | 1 |
| Brake pedal attachment screws loose |3.1.2b| | 1 |
| Front position lamp damaged and function impaired |1.1.1b| | 1 |
| Front Headlamp damaged and function impaired |1.2.3a| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| 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| | 1 |