| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 46 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 12 |
| Horn not working |1.7.3a| | 12 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 11 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 11 |
| Rear reflector on motorcycle missing |1.4.1| | 10 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 9 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 9 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Registration plate issues | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 7 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 6 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 6 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 6 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 5 |
| Drive chain excessively loose |6.2.1d| | 5 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 5 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 5 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 5 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Headlamp insecure |1.2.3b| | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 4 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Registration plate lamp issues | 3 |
| Fuel pipe leaking |7.2.1a| | 3 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 3 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 3 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| 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| | 3 |
| Offside Front Direction indicators not working |1.5.1c| | 3 |
| Direction indicator not working |1.5.1c| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Offside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Front Brake lever insecure |3.1.2a| | 2 |
| Rear suspension has corrosion which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 2 |
| Fuel system component leaking |7.2.1a| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Front Steering lock stop missing |2.1.3| | 2 |
| Nearside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Nearside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Offside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 2 |
| Offside Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 2 |
| Rear reflector on sidecar missing |1.4.1| | 2 |
| Rear Footrest missing |6.2.1a| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 2 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Offside Front Footrest insecure |6.2.1a| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Front Direction indicator not working |1.5.1c| | 2 |
| All position lamps not working (4.2.1 (a)) | 1 |
| Brake caliper|s| insecure |3.2.A1j| | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Brake component damaged and seriously reduced in strength |3.2.A1| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Fuel tank leaking |7.2.1a| | 1 |
| All position lamps not working front and rear. (4.2.1 (a)) | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Rear Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Rear Brake lining|s| less than 1.0 mm thick |1.1.13 |a|| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Built up wheel has a loose bolt/s |4.2.1c| | 1 |
| Rear Built up wheel has a loose bolt/s |4.2.1c| | 1 |
| Rear Rear suspension bush has excessive free play swing arm bushes |2.4.A2a|i|| | 1 |
| Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear Brake pedal is inoperative |3.1.3c| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Steering headbearing excessively stiff or notchy with wheel raised (2.2.2 (f) (i)) | 1 |
| Rear Brake locking device missing (3.2.A1e) | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front suspension assembly has an insecure fork brace |2.3.4d| | 1 |
| Offside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Rear Brake pedal is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Brake component has an inadequate repair |3.1.5| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Fuel system component leaking at carb area |6.1.3 |b| |i|| | 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 |
| Nearside Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Offside Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Rear Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Nearside Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Front Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Chain guard insecure |6.2.1c| | 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 |
| Rear Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Nearside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Front Handlebar mounting clamp loose |2.1.1a| | 1 |
| Offside Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Front Brake locking device missing |3.2.A1e| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Sidecar wheel bearings have excessive free play |5.2.3c| | 1 |
| Sidecar front position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Front wheel insecure |4.2.3b| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Offside Front Throttle control functioning such that safe operation of the motorcycle is adversely affected no return on throttle at full movement (6.2.7 (a) (ii)) | 1 |
| Rear Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Stop lamp not working front and rear (4.3.1 (a) (ii)) | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Rear Rear suspension has corrosion which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front suspension assembly component excessively bent |2.3.1| | 1 |
| Front wheel insecure |4.2.3b| | 1 |
| Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Offside Rear Rear suspension component loose |2.4.A.1a| | 1 |
| Front Brake hose fouling |3.2.B3b| | 1 |
| Rear Brake fluid reservoir insecurely mounted |3.2.B1a| | 1 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Forks insecure (2.2.2 (d) (i)) | 1 |
| Rear Brake component insecure (1.1.21 (c)) | 1 |
| Nearside Front Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Nearside Footrest insecure bolt missing bolt loose s/arm bolt loose (6.2.12 (a)) | 1 |
| Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 1 |
| Brake master cylinder severely corroded |3.2.B1b| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Front Sidecar direction indicator missing |1.5.1a| | 1 |
| Rear Sidecar direction indicator missing |1.5.1a| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| All direction indicators adversely affected by the operation of another lamp |4.4.3 |b|| | 1 |
| Stop lamp adversely affected by the operation of another lamp |4.3.3 |b|| | 1 |
| Nearside Rear Footrest missing |6.2.12 |a|| | 1 |
| Offside Rear Footrest missing |6.2.12 |a|| | 1 |
| Offside Front Footrest insecure |6.2.12 |a|| | 1 |
| Brake component insecure REAR TOURQUE ARM SPLIT PIN MISSING |1.1.21 |c|| | 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 |
| Nearside Rear Motorcycle structure joining/attachment plate or fastening insecure CHAIN ADJUSTER LOCK NUT LOOSE |6.1.1 |b| |i|| | 1 |
| Front Brake component damaged and seriously reduced in strength |3.2.A1| | 1 |
| Front Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride rear spindle |6.2.1h| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride Brake arm |6.2.1h| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 1 |
| Front Brake component is excessively corroded |3.1.5| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Front Fuel tank leaking |7.2.1a| | 1 |
| Nearside Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Fuel system component leaking carburettor |7.2.1a| | 1 |
| Rear Brake pedal mounting insecure |3.1.2a| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 1 |
| Centre Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Front mudguard insecure |2.3.7| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Plate brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.B2b| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Riders seat insecure |6.2.5 |a| |ii|| | 1 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Front Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Offside Upper Front suspension assembly component loose |2.3.1| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Nearside Front Steering lock stop ineffective |2.1.3| | 1 |
| Front Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Nearside Drive chain excessively loose |6.2.1d| | 1 |
| Front wheel spindle loose |2.3.3a| | 1 |
| Rear Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Floor brake test indicates a severely grabbing brake |3.3.C2d| | 1 |
| Position lamp not working |4.2.1 |a|| | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Front Headlamp aim not tested |1.6| | 1 |
| Front Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Front Brake lever mounting insecure |3.1.2a| | 1 |
| Rear Wheel spoke cracked Rear spoke cracked off from fixing to hub. (5.2.2 (d)) | 1 |
| Front Horn not working (7.7 (a)) | 1 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Front wheel spindle securing nut locking device insecure |2.3.5a| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |