| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 41 |
| Horn not working |1.7.3a| | 21 |
| Drive chain excessively loose |6.2.1d| | 20 |
| Front wheel bearings have excessive free play |2.3.5b| | 19 |
| Drive chain worn to excess |6.2.1e| | 16 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 16 |
| Rear reflector on motorcycle missing |1.4.1| | 12 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 10 |
| Steering headbearing has excessive free play |2.2.2| | 10 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 9 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 9 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 9 |
| Drive chain excessively tight |6.2.1d| | 8 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 8 |
| Handlebar deformed |2.1.1b| | 8 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 7 |
| Front wheel bearings are excessively rough |2.3.5b| | 7 |
| Nearside Rear Direction indicator not working |1.5.1c| | 7 |
| Headlamp aim beam image kick up to the offside |1.6| | 6 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 6 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Nearside Front Direction indicator not working |1.5.1c| | 6 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 6 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 6 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 6 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 6 |
| Registration plate issues | 6 |
| 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| | 6 |
| Headlamp switch faulty |1.2.4| | 5 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 5 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| Rear reflector on motorcycle obscured |1.4.1| | 5 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 5 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 5 |
| Offside Front Footrest insecure |6.2.1a| | 4 |
| Front Steering headbearing has excessive free play |2.2.2| | 4 |
| Offside Rear Direction indicator not working |1.5.1c| | 4 |
| Riders seat insecure |6.2.1a| | 4 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 4 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 4 |
| Rear Wheel spoke excessively loose |4.2.1b| | 4 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 4 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 4 |
| Position lamp switch insecure |1.1.4b| | 4 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 4 |
| Rear Drive chain excessively loose |6.2.1d| | 4 |
| Rear Brake locking device missing |3.2.A1e| | 4 |
| Offside Rear Direction indicators not working |1.5.1c| | 3 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 3 |
| Nearside Front Footrest insecure |6.2.1a| | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Nearside Rear Direction indicator missing |1.5.1a| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 3 |
| Offside Front Direction indicator not working |1.5.1c| | 3 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 3 |
| Nearside Rear Footrest missing |6.2.1a| | 3 |
| Offside Rear Footrest missing |6.2.1a| | 3 |
| Front Wheel spoke excessively loose |4.2.1b| | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Rear Brake component defective due to a deliberate modification which significantly reduces the original strength |3.1.5| | 2 |
| Offside Front Position lamp switch insecure |1.1.4b| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Front Front position lamp incorrect colour |1.1.2a| | 2 |
| Front mudguard insecure |2.3.7| | 2 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Offside Front Direction indicator missing |1.5.1a| | 2 |
| Front suspension assembly component excessively misaligned |2.3.1| | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Rear Wheel spoke cracked. |4.2.1b| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 2 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Nearside Front Direction indicator insecure |1.5.3b| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Fuel tank leaking |7.2.1a| | 2 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Offside Rear Direction indicator missing |1.5.1a| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Brake pedal pivots excessively worn |3.1.3a| | 2 |
| Front position lamp incorrect colour |1.1.2a| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 2 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Rear Upper Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 2 |
| Rear Wheel spoke missing |4.2.1b| | 2 |
| Front Position lamp not working (4.2.1 (a)) | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Outer Direction indicators not working |1.5.1c| | 1 |
| Rear Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Indicator switch defective |1.5.4| | 1 |
| Front wheel spindle securing nut|s| loose |2.3.5a| | 1 |
| Brake hose damaged | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Wheel spoke excessively loose |4.2.1b| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Rear Brake locking device insecure |3.2.A1e| | 1 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Front Direction indicator missing |1.5.1a| | 1 |
| Rear Direction indicator missing |1.5.1a| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Offside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 1 |
| Brake performance not tested |3.3| | 1 |
| Nearside Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Offside Front suspension assembly component cracked |2.3.1| | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Front Brake lever attachment screws loose |3.1.2b| | 1 |
| Front Upper Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Nearside Exhaust has part of the system missing |7.1.1a| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear reflector on motorcycle deteriorated and function impaired |1.4.2a| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Plate brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.B2b| | 1 |
| Nearside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Footrest missing |6.2.1a| | 1 |
| Nearside Front Position lamp switch insecure |1.1.4b| | 1 |
| Offside Steering lock stop missing |2.1.3| | 1 |
| Rear Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Rear suspension bearing has excessive free play swinging arm |2.4.A2a|i|| | 1 |
| Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Drive chain sprocket carrier worn to excess Bearing part of |6.2.1e| | 1 |
| Brake lever is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Front Front position lamp insecure |1.1.1c| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear Rear position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Rear Rear reflector on sidecar missing |1.4.1| | 1 |
| Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Rear position lamp insecure |1.1.1c| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Throttle operating incorrectly |6.2.1f| | 1 |
| Rear Floor brake test indicates a severely grabbing brake |3.3.C2d| | 1 |
| Rear wheel insecure |4.2.3b| | 1 |
| Hydraulic brake control creeps under load. |3.1.4a| | 1 |
| Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear suspension bearing has excessive free play rear swing arm |2.4.A2a|i|| | 1 |
| Direction indicator incorrect colour all |1.5.1b| | 1 |
| Front position lamp missing |1.1.1a| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Nearside Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Offside Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Nearside Handlebar mounting clamp loose |2.1.1a| | 1 |
| Headlamp insecure Aux lamp loose |1.2.3b| | 1 |
| Motorcycle structure excessively distorted Center stand |6.1.1a| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Front Wheel spindle loose |5.2.1 |c| |i|| | 1 |
| Handlebar mounting so insecure that steering is adversely affected |2.2.1 |a| |ii|| | 1 |
| Nearside Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Offside Wheel spoke excessively loose |4.2.1b| | 1 |
| Nearside Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Offside Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Upper Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Brake pedal is inoperative |3.1.3c| | 1 |
| Front Riders seat insecure |6.2.1a| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Front Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Nearside Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Front Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Headlamp aim headlamp deteriorated and function impaired no beam pattern |1.2.3a| | 1 |
| Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Lower Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Suspension arm pin or bush excessively worn rear bushes wing arm |5.3.4 |a| |i|| | 1 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Throttle operating incorrectly to much slack and notchy |6.2.1f| | 1 |
| Steering lock stop ineffective hit tank before lock stops |2.1.3| | 1 |
| Exhaust is leaking and excessively noisey from header |7.1.1b| | 1 |
| Fairings insecure and likely to impede the steering tank scoops |2.1.2e| | 1 |
| Front shock absorber seal failed and leaking oil both |2.3.3| | 1 |
| Front wheel insecure spindle locking device loose |4.2.3b| | 1 |
| Lower Rear mono-shock insecure bolt loose |2.4.B.4| | 1 |
| Lower Rear mono-shock pivot excessively worn shock mount and linkage |2.4.B.4| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Offside Headlamp switch insecure |1.2.4| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Horn missing |1.7.1| | 1 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Front Front position lamp missing |1.1.1a| | 1 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Nearside Front Direction indicator obscured |1.5.1a| | 1 |
| Offside Front Direction indicator obscured |1.5.1a| | 1 |
| Nearside Position lamp switch insecure |1.1.4b| | 1 |
| Nearside Front Direction indicator missing |1.5.1a| | 1 |
| Offside Front Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Rear Footrest insecure |6.2.1a| | 1 |
| Offside Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Front Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Front Footrest insecure |6.2.1a| | 1 |
| Rear Brake rod excessively corroded |3.2.A1c| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Clutch lever positioned so it cannot be readily operated. missing |6.2.1g| | 1 |
| Front Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Rear suspension component misaligned |2.4.A.1a| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 1 |
| Headlamp insecure |4.1.1 |c|| | 1 |
| Position lamp not working |4.2.1 |a|| | 1 |
| Drive chain sprocket excessively loose spring washers |6.1.7 |c| |i|| | 1 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking engine mount missing |6.1.1c| | 1 |
| Direction indicator affected by the operation of another lamp front indicators used as marker lights |1.5.1c| | 1 |
| Rear Seat insecure |6.2.1a| | 1 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Rear Motorcycle structure joining/attachment plate or fastening insecure mudgaurd (6.1.1 (b) (i)) | 1 |
| Headlamp at least one does not illuminate on dipped beam (1.2.2a(i)) | 1 |
| Drive chain excessively loose (6.2.1d) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Registration plate lamp issues | 1 |
| Fuel pipe union leaking (6.1.3 (b) (i)) | 1 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Headlamp lens missing (4.1.1 (b) (ii)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |