| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 41 |
| Steering headbearing has excessive free play |2.2.2| | 28 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 25 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 25 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 24 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 16 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 15 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 15 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 12 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 11 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 10 |
| Horn not working |1.7.3a| | 10 |
| Registration plate issues | 9 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 7 |
| Front Steering headbearing has excessive free play |2.2.2| | 7 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 6 |
| Direction indicators not working |1.5.1c| | 6 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 5 |
| Stop lamp remains on when the brake is released |1.3.1e| | 5 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 5 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 5 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 4 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 4 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Headlamp insecure |1.2.3b| | 4 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 3 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Offside Front Direction indicator not working |1.5.1c| | 3 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Rear Brake lever pivots excessively worn |3.1.3a| | 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 |
| Offside Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 3 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 3 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Exhaust mounting missing |7.1.1c| | 3 |
| Front Direction indicators not working |1.5.1c| | 3 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Nearside Direction indicators not working |1.5.1c| | 2 |
| Offside Direction indicators not working |1.5.1c| | 2 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Headlamp dipped beam flickers when tapped lightly by hand |1.2.2c| | 2 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front suspension assembly component excessively corroded. |2.3.1| | 2 |
| Rear 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 |
| Rear Stop lamp damaged and function impaired |1.3.3a| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Front Front mudguard insecure |2.3.7| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Front Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| Rear Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 2 |
| Upper Steering headbearing has excessive free play |2.2.2| | 2 |
| Rear Rear wheel insecure |4.2.3b| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Front mudguard insecure |2.3.7| | 2 |
| Front Direction indicator insecure |1.5.3b| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Offside Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Direction indicator insecure |1.5.3b| | 1 |
| Offside Direction indicator insecure |1.5.3b| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Offside Front Brake lever attachment screws missing |3.1.2b| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Rear position lamp missing |1.1.1a| | 1 |
| Centre Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Centre Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Offside Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Gradient brake test indicates a binding brake |3.3.D1c| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Steering control handlebar movement restricted by cables caught on a projection |2.1.2c| | 1 |
| Front Upper Fairing insecure and likely to impede the steering |2.1.2e| | 1 |
| Nearside Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Offside Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Direction indicator incorrect colour |1.5.1b| | 1 |
| Centre Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Rear Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Rear Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Front suspension assembly has excessive free play in the pivot bearings. |2.3.2| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Indicator tell tale not operating correctly |1.5.2| | 1 |
| Rear Brake lever attachment screws missing |3.1.2b| | 1 |
| Front Upper Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Offside Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Offside Rear Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Centre Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Centre Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Nearside Front Upper Fairing insecure and likely to impede the steering |2.1.2e| | 1 |
| Centre Rear Upper Fuel cap does not fasten securely by a positive means |7.2.2b| | 1 |
| Outer Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Rear Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Direction indicator incorrect colour |1.5.1b| | 1 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Stop lamp obscured |1.3.1c| | 1 |
| Rear position lamp obscured more than 50% |1.1.1d| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |
| Nearside Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Centre Front Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Nearside Rear Lower Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Front Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Headlamp aim not tested |1.6| | 1 |
| Rear Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Front Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Handlebar deformed |2.1.1b| | 1 |
| Front Motorcycle structure excessively distorted |6.1.1a| | 1 |
| Offside Front Fairing insecure and likely to impede the steering |2.1.2e| | 1 |
| Centre Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Front Exhaust mounting missing |7.1.1c| | 1 |
| Front Front position lamp flickers when tapped lightly by hand |1.1.3c| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Rear Brake pipe excessively damaged |3.2.B2a| | 1 |
| Front Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Rear Brake lever is inoperative |3.1.3c| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Nearside Front Lower Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Front Lower Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Centre Front Upper Fairing insecure and likely to impede the steering |2.1.2e| | 1 |
| Nearside Rear Lower Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Front Lower Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Centre Rear Lower Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Centre Rear Upper Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Centre Rear Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Centre Front Lower Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Exhaust has part of the system missing |7.1.1a| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Centre Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Lower Steering headbearing has excessive free play |2.2.2| | 1 |
| All position lamps adversely affected by the operation of the horn |1.1.3b| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Centre Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear Built up wheel has a loose bolt/s |4.2.1c| | 1 |
| Fairings so located that it is likely to impede the steering |2.1.2e| | 1 |
| Rear Brake pipe inadequately supported |3.2.B2b| | 1 |
| Rear Exhaust excessively deteriorated |7.1.1a| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Front position lamp does not illuminate immediately when switched on dipped beam |1.1.3a| | 1 |
| Rear Brake pipe likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Rear Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Front Stop lamp missing |1.3.3a| | 1 |
| Rear Stop lamp missing |1.3.3a| | 1 |
| Nearside Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Centre Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Centre Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Fairing so located that it is likely to impede the steering |2.1.2e| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |