| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 85 |
| Steering headbearing has excessive free play |2.2.2| | 42 |
| Headlamp aim out of alignment | 37 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 30 |
| Horn not working |1.7.3a| | 22 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 20 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 19 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 19 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 19 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 17 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 16 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 15 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 14 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 13 |
| Registration plate issues | 13 |
| Throttle operating incorrectly |6.2.1f| | 13 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 11 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 11 |
| Rear reflector missing |4.8.2 |a| |ii|| | 10 |
| Stop lamp remains on when the brake is released |1.3.1e| | 10 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 9 |
| 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| | 9 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 9 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 9 |
| Riders seat insecure |6.2.1a| | 8 |
| Rear reflector missing (4.8.2 (a) (ii)) | 8 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 8 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 7 |
| Front Steering headbearing has excessive free play |2.2.2| | 6 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Front suspension has inadequate damping effect. |2.3.6c| | 5 |
| Stop lamp remains on when the brakes are released | 5 |
| Direction indicators not working |1.5.1c| | 5 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 4 |
| Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 4 |
| Front Stop lamp emits other than a steady red light |1.3.1b| | 4 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 4 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 4 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 4 |
| Rear Stop lamp emits other than a steady red light |1.3.1b| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 4 |
| Headlamp insecure |1.2.3b| | 4 |
| Nearside Direction indicator not working |1.5.1c| | 3 |
| Stop lamp does not emit a steady light |1.3.1b| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Front Horn not working |1.7.3a| | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 3 |
| Rear Direction indicator not working |1.5.1c| | 3 |
| Front Brake excessively binding (1.2.1 (f)) | 3 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 3 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 3 |
| Offside Front Direction indicators not working |1.5.1c| | 3 |
| Handlebar deformed |2.1.1b| | 3 |
| Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Stop lamp emits other than a steady red light |1.3.1b| | 3 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 3 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 3 |
| Exhaust excessively deteriorated |7.1.1a| | 3 |
| Exhaust mounting missing |7.1.1c| | 3 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Front position lamp incorrect colour |1.1.2a| | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 2 |
| Offside Front Shock absorber has an excessively worn bush (5.3.2 (c)) | 2 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Front Shock absorber has negligible damping effect |5.3.2 |b|| | 2 |
| Rear Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Fuel system component leaking |6.1.3 |b| |i|| | 2 |
| Front Stop lamp deteriorated and function impaired |1.3.3a| | 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 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 2 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 2 |
| Direction indicator not working |1.5.1c| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Front Direction indicators not working |1.5.1c| | 2 |
| Indicator switch defective |1.5.4| | 2 |
| Offside Rear Lower Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Fuel cap does not fasten securely by a positive means |7.2.2b| | 2 |
| Front Direction indicator not working |1.5.1c| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 2 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Nearside Front position lamp incorrect colour |1.1.2a| | 2 |
| Offside Front position lamp incorrect colour |1.1.2a| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 2 |
| Front Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 2 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 2 |
| Rear Brake component has an inadequate repair |3.1.5| | 2 |
| Centre Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Offside Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 2 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Nearside Front All direction indicators not working |4.4.1 |a| |ii|| | 2 |