| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 32 |
| Steering headbearing has excessive free play |2.2.2| | 17 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 12 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 11 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 7 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 5 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 5 |
| Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Front Brake caliper|s| insecure |3.2.A1j| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Horn not working |1.7.3a| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 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 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 2 |
| Rear Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 2 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Rear Footrest missing |6.2.1a| | 2 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front position lamp incorrect colour |1.1.2a| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 2 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 2 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear Brake lever attachment screws loose |3.1.2b| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front suspension assembly component excessively bent |2.3.1| | 1 |
| Nearside Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Steering linkage has excessive free play |2.2.2| | 1 |
| Nearside Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Lower Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Lower Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Fuel cap does not fasten securely by a positive means |7.2.2b| | 1 |
| Offside Front Brake lever mounting insecure Lever loose |3.1.2a| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Rear Brake lever insecure |1.1.2 |e| |i|| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Nearside Indicator switch does not operate the direction indicators on the side selected |1.5.4| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Headlamp aim beam image kick up to the offside dips to offside |1.6| | 1 |
| Front Brake locking device missing |3.2.A1e| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Stop lamp remains on when the brake is released brake light stuck on |1.3.1e| | 1 |
| Brake disc|s| excessively worn front disc worn out |3.2.A1l| | 1 |
| Brake fluid reservoir severely corroded level sight corroded |3.2.B1b| | 1 |
| Brake fluid reservoir leaking hydraulic fluid leaking fluid from sight glass |3.2.B1e| | 1 |
| Front shock absorber seal failed and leaking oil front right hand fork leg leaking |2.3.3| | 1 |
| Front shock absorber seal failed and leaking oil left front fork leg corroded |2.3.3| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Front Brake component has an inadequate repair |3.1.5| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Horn not working (7.7 (a)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Motorcycle structure is fractured and structural rigidity is significantly reduced rear mudguard loose (6.1.1 (a) (i)) | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Front Brake disc contaminated |1.1.14 |b|| | 1 |
| Steering headbearing in such a condition that steering control is adversely affected |2.2.2 |f| |ii|| | 1 |
| Nearside Rear Upper Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Rear Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Stop lamp flickers when tapped lightly by hand |1.3.1d| | 1 |
| Headlamp aim not tested |4.1.2 |b|| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Fork yoke insecure |2.2.2 |d| |i|| | 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 |
| Front Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Front Indicator switch defective |1.5.4| | 1 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Brake master cylinder severely damaged |3.2.B1b| | 1 |
| Central Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Rear wheel insecure |4.2.3b| | 1 |
| Front Brake hose fouling |3.2.B3b| | 1 |
| Rear Rear wheel insecure |4.2.3b| | 1 |
| Rear Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 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 |
| Offside 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| | 1 |
| Nearside Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Nearside Rear Brake lever insecure |3.1.2a| | 1 |
| Nearside Position lamp switch insecure |1.1.4b| | 1 |
| Offside Position lamp switch insecure |1.1.4b| | 1 |
| Nearside Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Upper Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Front Front mudguard insecure |2.3.7| | 1 |
| Rear Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Rear Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 1 |
| Rear position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Rear Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Front Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Front Brake pipe inadequately supported |3.2.B2b| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |