| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 44 |
| Rear reflector on motorcycle missing |1.4.1| | 29 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 21 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 18 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 18 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 18 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 13 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 13 |
| Steering headbearing has excessive free play |2.2.2| | 11 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 10 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 9 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 9 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 8 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 8 |
| Nearside Steering lock stop ineffective |2.1.3| | 8 |
| Fuel cap sealing washer missing |7.2.2c| | 8 |
| Throttle operating incorrectly |6.2.1f| | 7 |
| Exhaust excessively deteriorated |7.1.1a| | 7 |
| Nearside Indicator tell tale not functioning |1.5.2| | 7 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Offside Steering lock stop ineffective |2.1.3| | 6 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 6 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| Horn not working |1.7.3a| | 5 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 5 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 5 |
| Riders seat insecure |6.2.1a| | 5 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Front suspension has inadequate damping effect. |2.3.6c| | 5 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 5 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Registration plate issues | 4 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 4 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear reflector on motorcycle obscured |1.4.1| | 3 |
| Headlamp aim not tested |1.6| | 3 |
| Nearside Indicator tell tale not operating correctly |1.5.2| | 3 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 3 |
| Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 3 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Front suspension assembly component excessively corroded. |2.3.1| | 3 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Front Steering headbearing has excessive free play |2.2.2| | 3 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Front Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 2 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front Front mudguard insecure |2.3.7| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Front suspension assembly component loose |2.3.1| | 2 |
| Nearside Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 2 |
| Offside Indicator tell tale not functioning |1.5.2| | 2 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Rear Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 2 |
| Offside Front Steering lock stop ineffective |2.1.3| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Steering lock stop missing |2.1.3| | 2 |
| Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 2 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Rear reflector on motorcycle insecure |1.4.2c| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Rear position lamp insecure |1.1.1c| | 2 |
| Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Brake disc|s| excessively pitted |3.2.A1l| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Nearside Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Offside Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Headlamp aim not tested |4.1.2 |b|| | 1 |
| Rear Brake lever has insufficient reserve travel |1.1.2 |a|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Nearside Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Rear suspension bearing excessively deteriorated |2.4A.2a|i|| | 1 |
| Indicator tell tale not functioning |1.5.2| | 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 |
| Rear suspension has severe distortion of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Horn missing |1.7.1| | 1 |
| Nearside Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Offside Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Offside Steering lock stop maladjusted |2.1.3| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Front Front suspension assembly component excessively bent |2.3.1| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Steering headbearing in such a condition that steering control is adversely affected |2.2.2 |f| |ii|| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Front Stop lamp flickers when tapped lightly by hand |1.3.1d| | 1 |
| Rear Stop lamp flickers when tapped lightly by hand |1.3.1d| | 1 |
| Brake performance not tested |3.3| | 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 |
| Rear Lower Exhaust mounting missing |7.1.1c| | 1 |
| Front wheel has a missing wheel nut|s| |4.2.3a| | 1 |
| Indicator tell tale not operating correctly |1.5.2| | 1 |
| Front Steering lock stop ineffective |2.1.3| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Front Plate brake test indicates a severely grabbing brake |3.3.B1b| | 1 |
| Offside Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Indicator tell tale not functioning |1.5.2| | 1 |
| Offside Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Nearside Indicator switch defective |1.5.4| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| 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|| | 1 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Nearside Front Steering lock stop ineffective |2.1.3| | 1 |
| Front suspension assembly component excessively bent |2.3.1| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Nearside Steering lock stop missing |2.1.3| | 1 |
| Front Headlamp aim not tested |1.6| | 1 |
| Exhaust has part of the system missing |7.1.1a| | 1 |
| Position lamp switch faulty |1.1.4a| | 1 |
| Rear Front mudguard insecure |2.3.7| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Offside Stop lamp does not illuminate immediately a brake applies brake |1.3.1a| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Nearside Outer Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Offside Outer Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Offside Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Front Steering control handlebar movement restricted by cables caught on a projection |2.1.2c| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Steering linkage has excessive free play |2.2.2| | 1 |
| Rear Brake lever mounting cracked |3.1.2c| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Front Brake pipe likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Nearside Fairing so located that it is likely to impede the steering |2.1.2e| | 1 |
| Centre Front Upper Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Headlamp dipped beam flickers when tapped lightly by hand |1.2.2c| | 1 |
| Indicator switch defective |1.5.4| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Footrest missing |6.2.1a| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Front An item not tested |Manual| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Rear Brake grabbing severely |1.2.1 |c|| | 1 |
| Rear Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 1 |
| Shock absorber has an excessively worn bush |5.3.2 |c|| | 1 |
| Suspension arm insecurely attached |5.3.3 |a| |i|| | 1 |
| Front Headlamp switch faulty |1.2.4| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Offside Front Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Centre Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Centre Front Front mudguard insecure |2.3.7| | 1 |
| Nearside Front Steering damper in such a condition that the steering action is impaired. |2.1.2d| | 1 |
| Offside Front Steering damper in such a condition that the steering action is impaired. |2.1.2d| | 1 |
| Centre Front Upper Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Centre Front Steering lock stop missing |2.1.3| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Front suspension has an inadequate repair of a load bearing member or its supporting structure. damage to stanchion |2.3.8| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Front Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Offside Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Rear Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Fuel pipe leaking |7.2.1a| | 1 |
| Front Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Offside Front Steering lock stop missing |2.1.3| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Steering lock stop missing |2.1.3| | 1 |
| Front Lower Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Steering headbearing has excessive wear or free play Exessive freeplay (2.2.2 (f) (i)) | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Headlamp at least one does not illuminate on main beam (1.2.2a(ii)) | 1 |
| Headlamp at least one does not illuminate on dipped beam (1.2.2a(i)) | 1 |
| Front Front wheel bearings have excessive free play (2.3.5b) | 1 |
| Centre Rear Rear suspension bush has excessive free play (2.4.A2a(i)) | 1 |
| Rear Rear suspension bush has excessive free play (2.4.A2a(i)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. (3.3.A2b) | 1 |
| Front Steering linkage locking device ineffective (2.1.3 (d)) | 1 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |