| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 79 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 70 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 46 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 36 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 30 |
| Horn not working |1.7.3a| | 30 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 29 |
| Rear reflector on motorcycle missing |1.4.1| | 29 |
| Steering headbearing has excessive free play |2.2.2| | 28 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 28 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 23 |
| Riders seat insecure |6.2.1a| | 17 |
| Registration plate issues | 17 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 15 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 13 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 13 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| 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| | 13 |
| Rear reflector on motorcycle obscured |1.4.1| | 13 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 11 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 11 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 11 |
| Direction indicators not working |1.5.1c| | 10 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 9 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 9 |
| Fuel cap sealing washer missing |7.2.2c| | 8 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 8 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 8 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 8 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 8 |
| Exhaust excessively deteriorated |7.1.1a| | 8 |
| Stop lamp remains on when the brake is released |1.3.1e| | 8 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 8 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 7 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 7 |
| Offside Front Direction indicator not working |1.5.1c| | 7 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 6 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Indicator switch defective |1.5.4| | 6 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 6 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 5 |
| Fuel system component leaking |7.2.1a| | 5 |
| Nearside Rear Direction indicator not working |1.5.1c| | 5 |
| Offside Rear Direction indicator not working |1.5.1c| | 5 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 5 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 5 |
| Direction indicator not working |1.5.1c| | 5 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 5 |
| Offside Rear Footrest missing |6.2.1a| | 5 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 5 |
| Headlamp aim not tested |1.6| | 5 |
| Offside Rear Direction indicator damaged and function impaired |1.5.3a| | 5 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 5 |
| Front Steering headbearing has excessive free play |2.2.2| | 4 |
| Headlamp dipped beam flickers when tapped lightly by hand |1.2.2c| | 4 |
| Nearside Front Front suspension has inadequate damping effect. |2.3.6c| | 4 |
| Offside Front Front suspension has inadequate damping effect. |2.3.6c| | 4 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 4 |
| Offside Front Direction indicators not working |1.5.1c| | 4 |
| Handlebar deformed |2.1.1b| | 4 |
| Horn control defective |1.7.2a| | 4 |
| Nearside Rear Footrest missing |6.2.1a| | 4 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Stop lamp remains on when the brakes are released | 4 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Front Brake lever insecure |3.1.2a| | 3 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 3 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 3 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 3 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 3 |
| Offside Footrest missing |6.2.1a| | 3 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 3 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 3 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Horn is not a constant note |1.7.3c| | 3 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 3 |
| Steering lock stop ineffective |2.1.3| | 3 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 3 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Nearside Steering lock stop ineffective |2.1.3| | 3 |
| Offside Steering lock stop ineffective |2.1.3| | 3 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 3 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| All direction indicators not working (4.4.1 (a) (ii)) | 2 |
| Headlamp aim unable to be tested (4.1.2 (b)) | 2 |
| Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Rear position lamp missing |1.1.1a| | 2 |
| Rear Brake lever is inoperative |3.1.3c| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Brake lever insecure |3.1.2a| | 2 |
| Offside Direction indicator not working |1.5.1c| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Headlamp damaged and function impaired |1.2.3a| | 2 |
| Rear position lamp deteriorated and function impaired |1.1.1b| | 2 |
| Offside Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Rear wheel insecure |4.2.3b| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 2 |
| Front position lamp incorrect colour |1.1.2a| | 2 |
| Nearside Rear Footrest insecure |6.2.1a| | 2 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 2 |
| Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Front Brake component worn and seriously reduced in strength |3.2.A1| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Headlamp dipped beam affected by the operation of the horn |1.2.2c| | 2 |
| Headlamp main beam affected by the operation of the horn |1.2.2c| | 2 |
| Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Nearside Front Direction indicator insecure |1.5.3b| | 2 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Front Shock absorber has negligible damping effect |5.3.2 |b|| | 2 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Exhaust mounting missing |7.1.1c| | 2 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Nearside Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 2 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Handlebar mounting clamp loose |2.1.1a| | 2 |
| Fuel pipe leaking |7.2.1a| | 2 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Offside Front Direction indicator insecure |1.5.3b| | 2 |
| Rear Brake lever cracked |3.1.2c| | 2 |
| Offside Footrest insecure |6.2.1a| | 2 |
| Nearside Footrest insecure |6.2.1a| | 2 |