| Most common failures | No# failures |
|---|
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 37 |
| Headlamp aim out of alignment | 31 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 27 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 27 |
| Steering headbearing has excessive free play |2.2.2| | 20 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 19 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 18 |
| Registration plate issues | 15 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 14 |
| Horn not working |1.7.3a| | 13 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 11 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 11 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 10 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 7 |
| Front wheel has a loose wheel nut|s| |4.2.3a| | 6 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 6 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 6 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 5 |
| Rear reflector on motorcycle missing |1.4.1| | 4 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Headlamp aim not tested |1.6| | 4 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 4 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 4 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Front Horn not working |1.7.3a| | 4 |
| Riders seat insecure |6.2.1a| | 4 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 4 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Headlamp switch faulty |1.2.4| | 3 |
| Fuel pipe leaking |7.2.1a| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Fuel system component leaking |7.2.1a| | 3 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 3 |
| Front Steering headbearing has excessive free play |2.2.2| | 3 |
| Plate brake test No brake control achieves an efficiency of 30%. |3.3.B2a| | 3 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 3 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 3 |
| Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| All position lamps adversely affected by the operation of the horn |1.1.3b| | 2 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Front Brake reaction bracket insecure |3.2.A1j| | 2 |
| Stop lamp deteriorated and function impaired |1.3.3a| | 2 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Steering linkage has excessive free play |2.2.2| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Rear Brake component is severely distorted |3.1.5| | 2 |
| Handlebar mounting clamp loose |2.1.1a| | 2 |
| Brake hose damaged | 2 |
| Rear Brake effort inadequate at a wheel |1.2.1 |a| |i|| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 2 |
| Offside Steering lock stop ineffective |2.1.3| | 2 |
| Rear Stop lamp damaged and function impaired |1.3.3a| | 2 |
| Front Steering linkage has excessive free play |2.2.2| | 2 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front Headlamp switch faulty |1.2.4| | 2 |
| Centre Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Headlamp dipped beam affected by the operation of the horn |1.2.2c| | 2 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Centre Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 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 |
| Headlamp main beam affected by the operation of the horn |1.2.2c| | 2 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 1 |
| Stop lamp obscured |1.3.1c| | 1 |
| Front wheel spindle securing nut locking device insecure |2.3.5a| | 1 |
| Rear Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Front suspension assembly component loose lower shock absorber bolts |2.3.1| | 1 |
| Rear Brake pedal insecure |3.1.2a| | 1 |
| Rear Brake linkage has abnormal movement due to excessive wear |3.2.A1i| | 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 position lamp insecure |1.1.1c| | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Front Front suspension spring worn and seriously weakened |2.3.2b| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Front Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Stop lamp not working |1.2.1b| | 1 |
| Offside Front Upper Fuel hose leaking |7.2.3| | 1 |
| Centre Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Front Brake locking device missing Front brake arm retaining circlip missing. |3.2.A1e| | 1 |
| Front position lamp flickers when tapped lightly by hand |1.1.3c| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Offside Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Brake hose excessively deteriorated | 1 |
| Offside Front Lower Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Fuel cap leaking |6.1.3 |b| |i|| | 1 |
| Upper Fairings so located that it is likely to impede the steering |2.1.2e| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Fuel cap sealing washer torn |7.2.2c| | 1 |
| Centre Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Offside Front Position lamp switch faulty |1.1.4a| | 1 |
| Brake pedal has insufficient reserve travel |1.1.2 |a|| | 1 |
| Front Brake locking device missing |3.2.A1e| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Offside Front suspension assembly component loose |2.3.1| | 1 |
| Upper Rear suspension component loose |2.4.A.1a| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Front suspension assembly component excessively bent |2.3.1| | 1 |
| Front suspension fouling which affects the movement of the front suspension. |2.3.6a| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected |6.2.7 |a| |ii|| | 1 |
| Offside Rear Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 1 |
| Fuel cap mounting flange/sealing method defective |7.2.2c| | 1 |
| Upper Fuel system component leaking |7.2.1a| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Brake lever is inoperative |3.1.3c| | 1 |
| Front Brake component is fractured |3.1.5| | 1 |
| Brake performance not tested |3.3| | 1 |
| Front Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Horn missing |1.7.1| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Front Brake component is severely distorted |3.1.5| | 1 |
| Offside Steering control handlebar movement restricted by cables caught on a projection |2.1.2c| | 1 |
| Offside Front Lower Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Offside Front Lower Brake back plate|s| insecure |3.2.A1j| | 1 |
| Outer Rear Lower Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Front Headlamp insecure |1.2.3b| | 1 |
| Inner Front Lower Steering headbearing has excessive free play |2.2.2| | 1 |
| Outer Front Lower Front wheel insecure |4.2.3b| | 1 |
| Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Centre Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Offside Front Lower Front suspension assembly component loose shock bush collapsed |2.3.1| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Lower Front suspension assembly component loose |2.3.1| | 1 |
| Rear Footrest insecure |6.2.1a| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Handlebar mounting clamp loose |2.1.1a| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Fuel pipe union leaking |7.2.1a| | 1 |
| Rear Gradient brake test indicates a sticking brake |3.3.D1c| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Centre Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Rear Brake lining|s| contaminated by oil or grease |3.2.A1k| | 1 |
| Plate brake test Neither brake control achieves an efficiency of 25% |3.3.B2b| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Front Road spring worn so that its cross sectional area is reduced and seriously weakened (5.3.1 (b) (i)) | 1 |
| Position lamp not working (4.2.1 (a)) | 1 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Front Steering lock stop maladjusted |2.1.3| | 1 |
| Rear Brake pedal attachment screws loose |3.1.2b| | 1 |
| Rear mono-shock insecure |2.4.B.4| | 1 |
| Nearside Rear Rear suspension component loose |2.4.A.1a| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort no reserve travel on lever |3.3.A1c| | 1 |
| Rear Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Fuel cap sealing washer missing |7.2.2c| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear Upper Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Front Brake cable badly frayed |3.2.A1b| | 1 |
| Centre Front Brake lining|s| contaminated by oil or grease |3.2.A1k| | 1 |
| Rear Braking system does not have an approriate system/s fitted according to its age |3.1.1| | 1 |
| Rear Gradient brake test indicates a binding brake |3.3.D1c| | 1 |
| Front Brake back plate|s| insecure |3.2.A1j| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Rear Fuel system component leaking |7.2.1a| | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Rear position lamp adversely affected by the operation of the horn |1.1.3b| | 1 |
| Stop lamp affected by the operation of the horn |1.3.2| | 1 |