| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 13 |
| Drive chain excessively loose |6.2.1d| | 7 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Rear reflector on motorcycle obscured |1.4.2b| | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Offside Rear Direction indicator insecure |1.5.3b| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Horn not working Replaced Horn (7.7 (a) (ii)) | 1 |
| Registration plate issues | 1 |
| Front Front position lamp does not illuminate immediately when switched on dip |1.1.3a| | 1 |
| Central Rear Outer Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.4 |a|| | 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 |
| Fuel cap leaking |6.1.3 |b| |i|| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Fuel system component leaking excessively or a risk of fire (6.1.3 (b) (ii)) | 1 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Front Front position lamp insecure |1.1.1c| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Nearside Rear Upper Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Offside Rear Upper Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Offside Indicator switch insecure |1.5.4| | 1 |
| Front Brake lever mounting insecure |3.1.2a| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Front Brake disc|s| insecure |3.2.A1g| | 1 |
| Steering headbearing has excessive wear or free play steering head bearing (2.2.2 (f) (i)) | 1 |
| Stop lamp not working when front or rear brake is applied (4.3.1 (a) (ii)) | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Lower Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Brake effort inadequate at a wheel |1.2.1 |a| |i|| | 1 |
| Front Brake lagging in operation |1.2.1 |d|| | 1 |
| Nearside Rear Direction indicator missing |4.4.1 |a| |ii|| | 1 |
| Front Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Rear Drive chain sprocket excessively loose bolts missing |6.1.7 |c| |i|| | 1 |
| Fuel tank leaking |6.1.3 |b| |i|| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Front Headlamp aim not tested |4.1.2 |b|| | 1 |
| Nearside Rear Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Rear Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front suspension has a modification which reduces the strength of a load bearing member or its supporting structure. Mudguard missing. |2.3.8| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Direction indicators affected by the operation of another lamp main lights |1.5.1c| | 1 |
| Horn not working |1.7.3a| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Steering lock stop maladjusted |2.1.3| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Drive chain sprocket carrier worn to excess bearing worn |6.2.1e| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Suspension arm attachment bracket/mounting insecure Swing Arm (5.3.3 (a) (i)) | 1 |
| Shock absorber has negligible damping effect Rear shock absorbers negligible damping (5.3.2 (b)) | 1 |
| Shock absorber has negligible damping effect Front forks has negligible damping (5.3.2 (b)) | 1 |
| Brake pedal is inoperative |3.1.3c| | 1 |
| Offside Position lamp switch faulty |1.1.4a| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded brake pedal |3.2.A1h| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Stop lamp does not illuminate immediately a brake applies front switch |1.3.1a| | 1 |
| Rear Drive chain horseshoe locking device likely to become detached |6.1.7 |j| |ii|| | 1 |
| Rear Drive chain sprocket so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Offside Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Offside Rear Brake pedal attachment screws loose brake arm lock bolt loose |3.1.2b| | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Offside Steering lock stop missing |2.1.3| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Rear reflector on motorcycle obscured covered by learner plate |1.4.2b| | 1 |
| Drive chain worn to excess very worn and has stiff links |6.2.1e| | 1 |
| Fuel cap mounting flange/sealing method defective |7.2.2c| | 1 |
| Direction indicators affected by the operation of another lamp All indicators flash with switch in either position |1.5.1c| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Offside Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Fuel pipe leaking |7.2.1a| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies brake lever |1.3.1a| | 1 |
| Offside Handlebar excessively deformed bars foul tank |2.2.1 |c| |i|| | 1 |
| Offside Rear Footrest missing |6.2.12 |a|| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Rear Drive chain sprocket so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Rear Brake grabbing severely |1.2.1 |c|| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |