| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 32 |
| Drive chain excessively loose |6.2.1d| | 13 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 9 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 8 |
| Drive chain worn to excess |6.2.1e| | 8 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 8 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 8 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 7 |
| Offside Rear Footrest missing |6.2.1a| | 7 |
| Registration plate issues | 7 |
| Rear reflector on motorcycle missing |1.4.1| | 6 |
| Horn not working |1.7.3a| | 6 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 6 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 5 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 5 |
| Nearside Rear Footrest missing |6.2.1a| | 5 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Headlamp aim beam image kick up to the offside |1.6| | 5 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 4 |
| Drive chain excessively tight |6.2.1d| | 4 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 4 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Rear suspension component excessively corroded. |2.4.A.1a| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 2 |
| Centre Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Rear suspension has corrosion which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Rear Brake pedal has insufficient reserve travel |1.1.2 |a|| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 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 Headlamp damaged and function impaired |1.2.3a| | 2 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Drive chain excessively tight |6.1.7 |k| |i|| | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 2 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 2 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Handlebar mounting insecure |2.2.1 |a| |i|| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Front Drive chain worn to excess |6.2.1e| | 1 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Direction indicator insecure |1.5.3b| | 1 |
| Front Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Front Brake cylinder severely corroded |3.2.B1b| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride Front sprocket nut loose |6.2.1h| | 1 |
| Offside Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Headlamp aim beam image too far to the right |1.6.4| | 1 |
| Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Brake locking device insecure |3.2.A1e| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Rear suspension component excessively corroded. |2.4.A.1a| | 1 |
| Headlamp missing Pattern missing on dip on main a halo effect |1.2.3a| | 1 |
| Throttle operating incorrectly |6.2.7 |a| |i|| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Offside Rear Shock absorber likely to become detached |5.3.2 |a| |ii|| | 1 |
| Nearside Rear Shock absorber likely to become detached |5.3.2 |a| |ii|| | 1 |
| Front Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Rear suspension component loose |2.4.A.1a| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Front suspension assembly component missing |2.3.1| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Front Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Nearside Direction indicator missing |1.5.1a| | 1 |
| Offside Direction indicator missing |1.5.1a| | 1 |
| Front Horn control not functioning. |1.7.2b| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Throttle operating incorrectly sticking on |6.2.7 |a| |i|| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear wheel spindle loose |2.4.A.2b| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Front Brake lining|s| contaminated by oil or grease |3.2.A1k| | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen Beam is totaly incorrect, no decernible pattern (4.1.2 (a)) | 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 Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Brake pedal insecure |3.1.2a| | 1 |
| Footrest missing |6.2.1a| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Centre Front Headlamp insecure |1.2.3b| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Centre Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Steering lock stop missing |2.1.3| | 1 |
| An item not tested |Manual| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Brake linkage clevis joint excessively worn |3.2.A1d| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Rear Brake performance not tested Brake not working on floor test (1.2.1 (g)) | 1 |
| Rear Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Position lamp adversely affected by the operation of another lamp Tail lamp does not work with hi-beam on (4.2.3 (b)) | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride no locking device fitted to rear brake torque arm fixing [rear] |6.2.1h| | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Front Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Front Handlebar deformed |2.1.1b| | 1 |
| Front Clutch lever bent so it cannot be readily operated. |6.2.1g| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Centre Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Centre Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Central Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Nearside Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Headlamp dipped beam flickers when tapped lightly by hand |1.2.2c| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Position lamp switch faulty |1.1.4a| | 1 |
| Front All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Rear All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Exhaust excessively deteriorated |7.1.1a| | 1 |
| Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Centre Rear Lower Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Rear Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Front Motorcycle structure excessively distorted |6.1.1a| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Handlebar mounting so insecure that steering is adversely affected (2.2.1 (a) (ii)) | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Nearside Front Handlebar deformed |2.1.1b| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Brake locking device missing reaction arm locking device missing |3.2.A1e| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride axle castle nut locking device missing |6.2.1h| | 1 |
| Drive chain sprocket carrier worn to excess bushes excess play |6.2.1e| | 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 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Offside Front suspension assembly component excessively bent |2.3.1| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |