| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 52 |
| Steering headbearing has excessive free play |2.2.2| | 24 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 18 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 16 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 14 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Registration plate issues | 8 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 7 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 7 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Front suspension has inadequate damping effect. |2.3.6c| | 6 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 6 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 6 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 5 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 5 |
| Riders seat insecure |6.2.1a| | 5 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 4 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 4 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 4 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 4 |
| Front Steering headbearing has excessive free play |2.2.2| | 4 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 3 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 2 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 2 |
| Nearside Front suspension assembly component excessively corroded. |2.3.1| | 2 |
| Offside Front suspension assembly component excessively corroded. |2.3.1| | 2 |
| Nearside Front Handlebar mounting clamp bolt loose |2.1.1a| | 2 |
| Rear Brake lever insecure |3.1.2a| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Fuel system component leaking |7.2.1a| | 2 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Horn sounds harsh or grating |1.7.3c| | 2 |
| Nearside Rear Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Fuel cap sealing washer missing |7.2.2c| | 2 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Brake lever is inoperative |3.1.3c| | 1 |
| Rear Brake lever is inoperative |3.1.3c| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Rear position lamp missing |1.1.1a| | 1 |
| Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Brake lever insecure |3.1.2a| | 1 |
| Rear Upper Riders seat insecure |6.2.1a| | 1 |
| Nearside Indicator switch defective |1.5.4| | 1 |
| Offside Indicator switch defective |1.5.4| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Front suspension assembly component loose |2.3.1| | 1 |
| Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Nearside Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Offside Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front Brake performance not tested |3.3| | 1 |
| Plate brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.B2b| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Brake lever mounting insecure |3.1.2a| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Centre Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Centre Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Centre Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Steering damper in such a condition that the steering action is impaired. |2.1.2d| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Nearside Front Brake locking device insecure |3.2.A1e| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Rear Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort warped front disc |3.3.A1d| | 1 |
| Rear Brake component insecure brake arm (1.1.21 (c)) | 1 |
| Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Nearside Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Front Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Front Brake cylinder severely corroded |3.2.B1b| | 1 |
| Rear Front mudguard insecure |2.3.7| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Offside Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Brake component damaged and seriously reduced in strength |3.2.A1| | 1 |
| Rear Brake component cracked and seriously reduced in strength |3.2.A1| | 1 |
| Rear Brake caliper|s| insecure |3.2.A1j| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Stop lamp affected by the operation of the horn |1.3.2| | 1 |
| Fuel pipe union leaking |7.2.1a| | 1 |
| Fuel pipe leaking |7.2.1a| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Rear Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Horn not working |1.7.3a| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| An item not tested |Manual| | 1 |
| Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Registration plate lamp issues | 1 |
| Nearside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Centre Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 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 |
| Front Brake cylinder insecurely mounted |3.2.B1a| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Nearside Brake lever insecure |3.1.2a| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Brake performance not tested |3.3| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Rear Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Fairings so located that it is likely to impede the steering |2.1.2e| | 1 |
| Front Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Stop lamp does not illuminate immediately a brake applies Front brake lever stop lamp |1.3.1a| | 1 |
| Offside Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Front suspension assembly component excessively bent |2.3.1| | 1 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |