| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 32 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 21 |
| Rear reflector on motorcycle missing |1.4.1| | 21 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 13 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 13 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Registration plate issues | 12 |
| Horn not working |1.7.3a| | 11 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 11 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 10 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 8 |
| Steering headbearing has excessive free play |2.2.2| | 8 |
| Fuel cap sealing washer missing |7.2.2c| | 7 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Indicator tell tale not functioning |1.5.2| | 6 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 6 |
| Brake hose damaged | 6 |
| Front suspension has inadequate damping effect. |2.3.6c| | 6 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 5 |
| Front Steering headbearing has excessive free play |2.2.2| | 5 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Riders seat insecure |6.2.1a| | 4 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 4 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 4 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 3 |
| Direction indicator not working |1.5.1c| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 3 |
| 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| | 3 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 3 |
| Front Front mudguard insecure |2.3.7| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Rear Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Fuel system component leaking |7.2.1a| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 2 |
| Front suspension assembly component excessively corroded. |2.3.1| | 2 |
| Front Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 2 |
| Front Riders seat insecure |6.2.1a| | 2 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Rear wheel insecure |4.2.3b| | 2 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 2 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Rear Front mudguard insecure |2.3.7| | 2 |
| Headlamp switch insecure |1.2.4| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Rear Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 2 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 2 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Position lamp not working |4.2.1 |a|| | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Rear Brake lagging in operation (1.2.1 (d)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Nearside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Front suspension assembly component loose |2.3.1| | 1 |
| Nearside Front suspension assembly has an insecure fork brace |2.3.4d| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Front Indicator tell tale not functioning |1.5.2| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Front Fairings insecure and likely to impede the steering mud guard insecure |2.1.2e| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear reflector on motorcycle insecure |1.4.2c| | 1 |
| Nearside Rear Lower Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Centre Rear Lower Rear reflector on motorcycle missing |1.4.1| | 1 |
| Nearside Front Upper Direction indicator not working |1.5.1c| | 1 |
| Offside Front Upper Direction indicator not working |1.5.1c| | 1 |
| Nearside Rear Upper Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Upper Direction indicator not working |1.5.1c| | 1 |
| Rear Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Upper Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Rear Lower Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Rear Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Steering damper in such a condition that the steering action is impaired. |2.1.2d| | 1 |
| Front Horn is not a constant note |1.7.3c| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Rear Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Offside Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Rear suspension component seized |2.4A2a|ii|| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Handlebar mounting clamp loose |2.1.1a| | 1 |
| Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Front suspension fouling which affects the movement of the front suspension. |2.3.6a| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Rear Exhaust excessively deteriorated |7.1.1a| | 1 |
| Fuel cap mounting flange/sealing method defective |7.2.2c| | 1 |
| Nearside Handlebar mounting clamp loose |2.1.1a| | 1 |
| Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Offside Front suspension assembly component loose |2.3.1| | 1 |
| Nearside Rear Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Rear Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Front Horn control not functioning. |1.7.2b| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Offside Handlebar handgrip missing |2.1.1c| | 1 |
| Headlamp missing |1.2.3a| | 1 |
| Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Nearside Front Front suspension assembly component excessively bent |2.3.1| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Exhaust system insecure (6.1.2 (a)) | 1 |
| Front Brake locking device missing |3.2.A1e| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Fuel hose leaking excessively or a risk of fire |6.1.3 |b| |ii|| | 1 |
| Offside Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Rear position lamp insecure |1.1.1c| | 1 |
| Offside Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Front position lamp damaged and function impaired |1.1.1b| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Front Front wheel spindle securing nut|s| loose |2.3.5a| | 1 |
| Rear Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Offside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Horn missing |1.7.1| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Rear Rear wheel insecure |4.2.3b| | 1 |
| Rear Brake pipe excessively damaged |3.2.B2a| | 1 |
| Rear Brake disc|s| insecure |3.2.A1g| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 1 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Front Brake pipe excessively chafed |3.2.B2a| | 1 |
| Rear Brake component is severely distorted |3.1.5| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Rear Stop lamp affected by the operation of the horn |1.3.2| | 1 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Outer Front Upper Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Front mudguard can easily contact any fixed point of the motor bicycle. |2.3.7| | 1 |
| Nearside Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Brake lever insecure |3.1.2a| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Brake component is fractured |3.1.5| | 1 |
| Nearside Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Fuel pipe leaking |7.2.1a| | 1 |
| Fairing insecure and likely to impede the steering |2.1.2e| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |