| Most common failures | No# failures |
|---|
| Steering headbearing has excessive free play |2.2.2| | 41 |
| Headlamp aim out of alignment | 36 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 25 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 24 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 23 |
| Horn not working |1.7.3a| | 18 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Fuel cap sealing washer missing |7.2.2c| | 14 |
| Riders seat insecure |6.2.1a| | 14 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 13 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 11 |
| Registration plate issues | 10 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 10 |
| Front Steering headbearing has excessive free play |2.2.2| | 10 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 9 |
| Direction indicators not working |1.5.1c| | 9 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 8 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 7 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 6 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 6 |
| Direction indicator not working |1.5.1c| | 6 |
| Nearside Front Direction indicator not working |1.5.1c| | 6 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 5 |
| Offside Steering lock stop ineffective |2.1.3| | 5 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 5 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 5 |
| Headlamp insecure |1.2.3b| | 5 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 4 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 4 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 4 |
| Offside Front Steering lock stop ineffective |2.1.3| | 4 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Exhaust excessively deteriorated |7.1.1a| | 4 |
| Nearside Rear Direction indicator not working |1.5.1c| | 4 |
| An item not tested |Manual| | 3 |
| Front Brake lever cannot be released smoothly |3.1.3d| | 3 |
| Upper Steering headbearing has excessive free play |2.2.2| | 3 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 3 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 3 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 3 |
| Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 3 |
| Front Headlamp insecure |1.2.3b| | 3 |
| Headlamp aim not tested |1.6| | 3 |
| Offside Front Direction indicators not working |1.5.1c| | 3 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Front suspension has inadequate damping effect. |2.3.6c| | 3 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 3 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Nearside Direction indicator not working |1.5.1c| | 2 |
| Fuel hose leaking |7.2.1a| | 2 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 2 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Front Brake cable has a significantly damaged outer casing. |3.2.A1b| | 2 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Front Upper Fairings insecure and likely to impede the steering |2.1.2e| | 2 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Headlamp switch faulty |1.2.4| | 2 |
| Front Brake cable badly frayed |3.2.A1b| | 2 |
| Front Riders seat insecure |6.2.1a| | 2 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 2 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 2 |
| Nearside Steering lock stop ineffective |2.1.3| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Front Headlamp aim beam image too far to the right |1.6.4| | 2 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 2 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 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 hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 2 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Rear position lamp incorrect colour |1.1.2b| | 2 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 2 |
| Headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Front Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Direction indicators not working all not working |1.5.1c| | 1 |
| Front Floor brake test indicates a severely grabbing brake |3.3.C2d| | 1 |
| Front Headlamp aim not tested |1.6| | 1 |
| Rear Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Steering control handlebar movement restricted by cables caught on a projection |2.1.2c| | 1 |
| Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Stop lamp affected by the operation of the horn |1.3.2| | 1 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 1 |
| Front Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies brake |1.3.1a| | 1 |
| Rear Stop lamp remains on when the brake is released brake |1.3.1e| | 1 |
| Front Front suspension assembly component loose |2.3.1| | 1 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Offside Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Front Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Fairing so located that it is likely to impede the steering |2.1.2e| | 1 |
| Riders seat insecure |6.2.5 |a| |ii|| | 1 |
| Rear Motorcycle structure joining/attachment plate or fastening insecure topbox rack |6.1.1 |b| |i|| | 1 |
| Shock absorber has negligible damping effect front shock absorbers (5.3.2 (b)) | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Upper All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Direction indicator affected by the operation of another lamp (1.5.1c) | 1 |
| Stop lamp affected by the operation of another lamp (1.3.2) | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front Lower Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front Brake fluid reservoir fluid not visible |1.1.10 |d| |iii|| | 1 |
| Nearside Front Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Offside Front Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Front Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Front Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Headlamp aim projected beam image obviously incorrect bulb fitted wrong way round (4.1.2 (c)) | 1 |
| Front Horn control not functioning. |1.7.2b| | 1 |
| Offside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Brake pipe likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Brake lever has insufficient reserve travel |1.1.2 |a|| | 1 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Nearside Steering lock stop missing |2.1.3| | 1 |
| Offside Steering lock stop missing |2.1.3| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Front Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Front Brake cable excessively corroded |3.2.A1b| | 1 |
| Nearside Rear Lower Footrest missing |6.2.1a| | 1 |
| Front Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Front Brake grabbing severely (1.2.1 (c)) | 1 |
| Fuel cap ineffective Seal missing (6.1.3 (b) (i)) | 1 |
| All direction indicators light intensity significantly reduced (4.4.3 (a)) | 1 |
| Front Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Brake lever is inoperative |3.1.3c| | 1 |
| Front Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Steering operation restricted in free movement from lock to lock |2.1.4 |c|| | 1 |
| Rear Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Nearside Indicator tell tale not functioning |1.5.2| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Front Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Front position lamp damaged and function impaired |1.1.1b| | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front suspension assembly component excessively corroded. |2.3.1| | 1 |
| Offside Front Brake lever insecure |3.1.2a| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Motorcycle structure adversely modified |6.1.1b| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Front Brake lever cracked |3.1.2c| | 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 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Nearside Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Offside Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Front wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Nearside Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Brake hose damaged | 1 |
| Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Headlamp dipped beam affected by the operation of the horn |1.2.2c| | 1 |
| Rear Brake lever attachment screws missing |3.1.2b| | 1 |
| Front Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Front Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front position lamp flickers when tapped lightly by hand |1.1.3c| | 1 |
| Front Throttle operating incorrectly |6.2.1f| | 1 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Centre Front Upper Steering lock stop maladjusted |2.1.3| | 1 |
| Indicator switch defective |1.5.4| | 1 |
| Front wheel spindle securing nut locking device insecure |2.3.3a| | 1 |
| Lower Steering headbearing has excessive free play |2.2.2| | 1 |
| Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Brake cable excessively corroded |3.2.A1b| | 1 |
| Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Brake performance not tested |3.3| | 1 |
| Rear Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Shock absorber has negligible damping effect both |5.3.2 |b|| | 1 |
| Front Shock absorber has a serious fluid leak both |5.3.2 |b|| | 1 |
| Front Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Front Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Nearside Brake lever has insufficient reserve travel |1.1.2 |a|| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |