| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 5 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Rear Brake excessively binding |1.2.1 |f|| | 3 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 2 |
| Steering headbearing in such a condition that steering control is adversely affected |2.2.2 |f| |ii|| | 2 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |
| Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Front Brake master cylinder leaking (1.1.10 (b) (ii)) | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Registration plate lamp issues | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride chain split link fitted incorrectly |6.2.1h| | 1 |
| Rear suspension bearing has excessive free play swinging arm bushes |2.4.A2a|i|| | 1 |
| Drive chain excessively loose |6.2.1d| | 1 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 1 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Rear Suspension arm ball joint excessively worn |5.3.4 |a| |i|| | 1 |
| Rear Wheel bearing play so excessive that directional control is impaired |5.1.3 |a| |ii|| | 1 |
| Rear Drive chain sprocket so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Brake hose excessively deteriorated | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Rear suspension component loose swinging arm |2.4.A.1a| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Throttle operating incorrectly throttle housing loose on handlebar |6.2.1f| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies does not come on with front brake application |1.3.1a| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear Brake component leaking fluid hose to caliper leaking |3.2.B4| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Nearside Front Clutch lever shortened so it cannot be readily operated (6.2.7 (b)) | 1 |
| Offside Front Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Rear Stop lamp missing (4.3.1 (a) (ii)) | 1 |
| Rear Position lamp missing (4.2.1 (a)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Rear Suspension arm ball joint excessively worn swing arm (5.3.4 (a) (i)) | 1 |
| Offside Rear Brake pedal not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Drive chain worn to excess links seized |6.2.1e| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Headlamp aim not tested headlamp not working |1.6| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride split link installed backwards |6.2.1h| | 1 |
| Offside Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Rear Lower Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Steering operation fouling on the fuel tank or bodywork on full lock |2.1.4 |b|| | 1 |
| Brake lever has restricted free movement |1.1.15 |e|| | 1 |
| Rear Footrest missing |6.2.12 |a|| | 1 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Front All position lamps not working |4.2.1 |a|| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Steering headbearing excessively stiff or notchy Notchy ! (2.2.2 (f) (i)) | 1 |
| Rear Brake caliper insecure |1.1.16 |c| |i|| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Front Brake fluid not visible (1.1.10 (d) (iii)) | 1 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 1 |
| Stop lamp not working front lever (4.3.1 (a) (ii)) | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 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 |
| Headlamp aim headlamp deteriorated and function impaired different bulbs fitted and no beam image on both bulbs |1.2.3a| | 1 |
| Stop lamp remains on when the brake is released front brake |1.3.1e| | 1 |
| Stop lamp does not illuminate immediately a brake applies rear brake |1.3.1a| | 1 |
| Horn not working |1.7.3a| | 1 |
| Nearside Handlebar mounting insecure |2.2.1 |a| |i|| | 1 |
| Exhaust silencer insecure Muffler clamp loose & muffler touching swinging arm |8.1.1 |b| |i|| | 1 |
| Front Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Rear Brake fluid not visible (1.1.10 (d) (iii)) | 1 |
| Rear Brake caliper insecure (1.1.16 (c) (i)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Front Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Offside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |