| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 31 |
| Rear reflector on motorcycle missing |1.4.1| | 26 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 16 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 15 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 14 |
| Drive chain excessively loose |6.2.1d| | 14 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 12 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 11 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 10 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 9 |
| Drive chain worn to excess |6.2.1e| | 8 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Offside Rear Footrest missing |6.2.1a| | 7 |
| Registration plate issues | 7 |
| Horn not working |1.7.3a| | 6 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 6 |
| Fuel system component insecure |7.2.1b| | 6 |
| Steering headbearing has excessive free play |2.2.2| | 6 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 5 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 5 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 4 |
| Offside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 4 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 4 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 4 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 4 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 4 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 4 |
| Headlamp switch faulty |1.2.4| | 4 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 4 |
| Nearside Rear Footrest missing |6.2.1a| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Offside Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Offside Rear Direction indicators not working |1.5.1c| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Offside Rear Direction indicator not working |1.5.1c| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Front suspension has inadequate damping effect. |2.3.6c| | 3 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 3 |
| Rear Drive chain excessively loose |6.2.1d| | 3 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Front Steering movement excessively stiff with the wheel raised |2.2.1b| | 3 |
| Offside Front Direction indicator not working |1.5.1c| | 3 |
| Fuel system component leaking |7.2.1a| | 3 |
| Offside Steering lock stop ineffective |2.1.3| | 3 |
| Front Steering headbearing has excessive free play |2.2.2| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 3 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Offside Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Offside Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 2 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Nearside Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Nearside Front Steering lock stop ineffective |2.1.3| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Nearside Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Nearside Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Nearside Steering lock stop ineffective |2.1.3| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Front Headlamp aim not tested |1.6| | 2 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Offside Rear Footrest insecure |6.2.1a| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear Brake pedal attachment screws missing. |3.1.2b| | 2 |
| Nearside Direction indicator not working |1.5.1c| | 2 |
| Nearside Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Offside Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Centre Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Offside Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Front Direction indicator missing |1.5.1a| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear mono-shock pivot seized |2.4.B.4| | 1 |
| Rear Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Front Lower Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Offside Front Front wheel spindle securing nut|s| loose |2.3.5a| | 1 |
| Offside Front Shock absorber has a serious fluid leak Fork seal |5.3.2 |b|| | 1 |
| Front Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 1 |
| Rear Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 1 |
| Handlebar restricted in free movement from lock to lock Hitting the mirrors |2.1.4 |c|| | 1 |
| Rear Brake disc significantly and obviously worn |1.1.14 |a| |i|| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Rear Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Front Brake component is excessively corroded |3.1.5| | 1 |
| Offside Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Brake component damaged and seriously reduced in strength |3.2.A1| | 1 |
| Nearside Front Upper Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Front Brake hose which buldges |3.2.B4| | 1 |
| Nearside Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Offside Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Nearside Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Centre Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Upper Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Headlamp dipped beam flickers when tapped lightly by hand |1.2.2c| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Offside Rear Footrest insecure |6.2.12 |a|| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Front Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Rear Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Offside Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Offside Rear Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Offside Brake component damaged and seriously reduced in strength |3.2.A1| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Front Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Rear Brake pedal is inoperative |3.1.3c| | 1 |
| Brake pedal mounting cracked . |3.1.2c| | 1 |
| Rear Brake pedal is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Handlebar deformed |2.1.1b| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front position lamp adversely affected by the operation of the horn |1.1.3b| | 1 |
| Nearside 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 |
| Rear reflector on sidecar incorrectly positioned |1.4.2d| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 1 |
| Front Brake disc|s| securing bolt|s| loose bobbins worn out |3.2.A1g| | 1 |
| Position lamp switch faulty dip and main beam switch not functioning correctly |1.1.4a| | 1 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 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 Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Front Front position lamp incorrect colour |1.1.2a| | 1 |
| Position lamp not working left front |4.2.1 |a|| | 1 |
| Front Brake disc contaminated |1.1.14 |b|| | 1 |
| Front Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Handlebar grip insecure to handlebar left and right |2.2.1 |d| |ii|| | 1 |
| Offside Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Brake hose excessively deteriorated | 1 |
| Rear Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Front Direction indicator missing |1.5.1a| | 1 |
| Rear Direction indicator missing |1.5.1a| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Brake pedal is positioned so that 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 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Rear Rear spring worn and seriously weakened |2.4A1b|ii|| | 1 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Nearside Drive chain excessively loose |6.2.1d| | 1 |
| Offside Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Offside Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Nearside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Brake pedal insecure |3.1.2a| | 1 |
| Front wheel insecure |4.2.3b| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Front suspension assembly component missing |2.3.1| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Nearside Rear Direction indicator missing |1.5.1a| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Front Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Offside Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Fork yoke deformed |2.1.1b| | 1 |
| Nearside Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Front Brake pipe inadequately supported |3.2.B2b| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 1 |
| Horn missing |1.7.1| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Offside Steering lock stop maladjusted |2.1.3| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Front Fuel system component insecure |7.2.1b| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Motorcycle structure excessively distorted |6.1.1a| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Offside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Stop lamp insecure |1.3.3b| | 1 |
| Nearside Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Front Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Nearside Front Handlebar mounting clamp bolt missing |2.1.1a| | 1 |
| Rear Rear reflector on sidecar incorrectly positioned |1.4.2d| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Headlamp light source and lamp not compatible on dip beam (4.1.4 (c)) | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |