| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 166 |
| Headlamp aim out of alignment | 82 |
| Steering headbearing has excessive free play |2.2.2| | 82 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 58 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 46 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 38 |
| Registration plate issues | 37 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 36 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 35 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 32 |
| Horn not working |1.7.3a| | 30 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 29 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 27 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 25 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 20 |
| Front Steering headbearing has excessive free play |2.2.2| | 18 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 18 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 18 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 17 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 17 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 16 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 16 |
| Rear reflector missing (4.8.2 (a) (ii)) | 15 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 15 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 15 |
| Throttle operating incorrectly |6.2.1f| | 15 |
| Riders seat insecure |6.2.1a| | 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 |
| Front suspension has inadequate damping effect. |2.3.6c| | 13 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 13 |
| Direction indicators not working |1.5.1c| | 11 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 11 |
| Stop lamp remains on when the brake is released |1.3.1e| | 11 |
| Stop lamp does not emit a steady light |1.3.1b| | 11 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 10 |
| Front Brake excessively binding (1.2.1 (f)) | 10 |
| Front Stop lamp emits other than a steady red light |1.3.1b| | 10 |
| Headlamp insecure |1.2.3b| | 10 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 9 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 8 |
| Indicator switch defective |1.5.4| | 8 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 8 |
| Front position lamp incorrect colour |1.1.2a| | 8 |
| Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 7 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 7 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 7 |
| Stop lamp remains on when the brakes are released | 7 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 7 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 6 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 6 |
| Horn control defective |1.7.2a| | 6 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 6 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 6 |
| Rear Stop lamp emits other than a steady red light |1.3.1b| | 6 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 6 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 6 |
| Offside Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 6 |
| Nearside Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 6 |
| 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)) | 5 |
| Brake lever has inadequate reserve travel |3.1.3b| | 5 |
| Rear reflector missing |4.8.2 |a| |ii|| | 5 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 5 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 5 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 5 |
| Stop lamp emits other than a steady red light |1.3.1b| | 5 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 5 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 4 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Front Direction indicator not working |1.5.1c| | 4 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 4 |
| Offside Rear Direction indicator not working |1.5.1c| | 4 |
| Nearside Direction indicator not working |1.5.1c| | 4 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 4 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 4 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Offside Rear Direction indicators not working |1.5.1c| | 4 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 4 |
| Direction indicator not working |1.5.1c| | 4 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Offside Rear Direction indicator missing |1.5.1a| | 4 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 4 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 4 |
| Handlebar deformed |2.1.1b| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 3 |
| Nearside Direction indicators not working |1.5.1c| | 3 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 3 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Rear Brake lever has insufficient reserve travel |1.1.2 |a|| | 3 |
| Rear Direction indicator not working |1.5.1c| | 3 |
| Nearside Front Direction indicator not working |1.5.1c| | 3 |
| Offside Front Direction indicator not working |1.5.1c| | 3 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 3 |
| Rear Brake excessively binding (1.2.1 (f)) | 3 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 3 |
| An item not tested |Manual| | 3 |
| Horn not working (7.7 (a) (ii)) | 3 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 3 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Nearside Front Direction indicators not working |1.5.1c| | 3 |
| Headlamp switch faulty |1.2.4| | 3 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 3 |
| Front mudguard insecure |2.3.7| | 3 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Offside Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 3 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 3 |
| Front Front mudguard insecure |2.3.7| | 3 |
| Rear Brake lever cannot be applied smoothly |3.1.3d| | 3 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Front suspension fouling which affects the movement of the front suspension. |2.3.6a| | 3 |
| Nearside Front position lamp incorrect colour |1.1.2a| | 3 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 3 |
| Fuel cap does not fasten securely by a positive means |7.2.2b| | 3 |
| Offside Rear Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Offside Rear Footrest missing |6.2.1a| | 3 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Nearside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Riders seat insecure |6.2.5 |a| |ii|| | 3 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 3 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 3 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 3 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Nearside Front Direction indicator insecure |1.5.3b| | 3 |
| Fuel system component leaking (6.1.3 (b) (i)) | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| All direction indicators not working |4.4.1 |a| |ii|| | 3 |
| Rear Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 3 |