| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 56 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 22 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 19 |
| Steering headbearing has excessive free play |2.2.2| | 17 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 16 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 15 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 14 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 14 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Registration plate issues | 11 |
| Rear reflector on motorcycle missing |1.4.1| | 9 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 7 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 7 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 7 |
| Front wheel bearings are excessively rough |2.3.5b| | 6 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 5 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 4 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 3 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 3 |
| Front position lamp incorrect colour |1.1.2a| | 3 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 3 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 3 |
| Front Steering lock stop ineffective |2.1.3| | 3 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 3 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 3 |
| Handlebar mounting clamp loose |2.1.1a| | 3 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 3 |
| Exhaust mounting missing |7.1.1c| | 2 |
| Indicator switch insecure |1.5.4| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Nearside Steering lock stop ineffective |2.1.3| | 2 |
| Offside Steering lock stop ineffective |2.1.3| | 2 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Seat insecure |6.2.1a| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Registration plate lamp issues | 2 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Rear Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Horn not working |1.7.3a| | 2 |
| 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| | 2 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Centre Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 2 |
| Rear Rear suspension movement is excessively stiff |2.4.A.3b| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Rear position lamp incorrect colour |1.1.2b| | 2 |
| Rear Stop lamp emits other than a steady red light |1.3.1b| | 2 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear reflector on motorcycle obscured |1.4.1| | 2 |
| Stop lamp does not illuminate immediately a brake applies front brake |1.3.1a| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Rear Lower Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Nearside Rear Brake hose leaking fluid |3.2.B4| | 1 |
| Nearside Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Brake component leaking fluid |3.2.B4| | 1 |
| Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Fairing so located that it is likely to impede the steering |2.1.2e| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Centre Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Shock absorber has a serious fluid leak both sides |forks| |5.3.2 |b|| | 1 |
| Front Brake disc contaminated |1.1.14 |b|| | 1 |
| Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 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 |
| Nearside Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Stop lamp not working from rear brake (4.3.1 (a) (ii)) | 1 |
| Rear Wheel fixing missing (multiple fixings) (5.2.1 (a) (i)) | 1 |
| Front Steering operation impeded by a fairing (2.1.4 (e)) | 1 |
| Rear Brake lever insecure (1.1.2 (e) (i)) | 1 |
| Rear Motorcycle structure joining/attachment plate or fastening insecure mud guard (6.1.1 (b) (i)) | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Rear Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Rear Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Nearside Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Centre Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Fuel hose leaking |7.2.1a| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Fuel pipe leaking |7.2.1a| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Brake component is excessively corroded |3.1.5| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Brake pipe excessively damaged |3.2.B2a| | 1 |
| Front Lower Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Brake disc|s| excessively pitted |3.2.A1l| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| All position lamps adversely affected by the operation of the horn |1.1.3b| | 1 |
| Rear wheel bearings have excessive free play Play in rear wheel, suspect rear wheel bearings. |2.4.A.2c| | 1 |
| Rear mono-shock pivot excessively worn Engine mount. |2.4.B.4| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride Main stand locking pin missing. |6.2.1h| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Rear reflector on motorcycle insecure |1.4.2c| | 1 |
| Rear Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Nearside Position lamp switch insecure |1.1.4b| | 1 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Brake caliper|s| insecure |3.2.A1j| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Offside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Rear Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Rear Footrest missing both sides |6.2.1a| | 1 |
| Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Indicator switch defective |1.5.4| | 1 |
| Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Nearside Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Rear position lamp incorrect colour |1.1.2b| | 1 |
| Front Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Front mudguard insecure |2.3.7| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Nearside Indicator switch insecure |1.5.4| | 1 |
| Rear mono-shock pivot seized |2.4.B.4| | 1 |
| Rear Brake lever excessively damaged |3.2.A1c| | 1 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Nearside Leg shield insecure and likely to impede the steering |2.1.2e| | 1 |
| Offside Leg shield insecure and likely to impede the steering |2.1.2e| | 1 |
| Nearside Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Offside Rear Exhaust has part of the system missing |7.1.1a| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Front Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Front Front suspension assembly component missing |2.3.1| | 1 |
| Front Riders seat insecure |6.2.1a| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Offside Steering lock stop missing |2.1.3| | 1 |
| Nearside Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Position lamp switch insecure |1.1.4b| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Rear Hydraulic brake control creeps under load. |3.1.4a| | 1 |
| Front Handlebar retaining device loose (2.2.1 (b) (i)) | 1 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Nearside 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 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| All position lamps not working (4.2.1 (a)) | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Stop lamp not working front brake control (4.3.1 (a) (ii)) | 1 |
| Nearside Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Offside Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Nearside Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear position lamp adversely affected by the operation of the horn |1.1.3b| | 1 |
| Front Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Centre Rear Lower Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Rear wheel has a loose wheel stud|s| |4.2.3a| | 1 |
| Rear Shock absorber has negligible damping effect partially seized not moving freely (5.3.2 (b)) | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Seat insecure |6.2.1a| | 1 |
| Centre Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Front Indicator tell tale not functioning |1.5.2| | 1 |
| Front Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 1 |
| Front Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Rear Brake component is excessively corroded |3.1.5| | 1 |
| Rear Brake lever is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Rear Brake pipe inadequately supported |3.2.B2b| | 1 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Offside Front Brake lever mounting insecure |3.1.2a| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Offside Front Headlamp insecure |1.2.3b| | 1 |
| Centre Front Handlebar mounting clamp bolt loose |2.1.1a| | 1 |