| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 18 |
| Drive chain excessively loose |6.2.1d| | 11 |
| Registration plate lamp issues | 6 |
| Front wheel bearings are excessively rough |2.3.5b| | 6 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 5 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 5 |
| Rear reflector on motorcycle missing |1.4.1| | 5 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Horn not working |1.7.3a| | 3 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Registration plate issues | 3 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 2 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 2 |
| Riders seat insecure |6.2.5 |a| |ii|| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Nearside Steering lock stop missing |2.1.3| | 2 |
| Offside Steering lock stop missing |2.1.3| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Rear Brake fluid reservoir insecurely mounted |3.2.B1a| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Brake lever has restricted free movement |1.1.15 |e|| | 1 |
| Front Headlamp aim not tested dip beam not working |4.1.2 |b|| | 1 |
| Throttle operating incorrectly sticks on right hand lock |6.2.7 |a| |i|| | 1 |
| Steering headbearing excessively stiff or notchy very notchy |2.2.2 |f| |i|| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.4 |a|| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Nearside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Headlamp insecure |4.1.1 |c|| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 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 |
| Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Rear Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| All position lamps do not illuminate immediately when switched on number plate illumination |1.1.3a| | 1 |
| Offside Front Brake disc contaminated |1.1.14 |b|| | 1 |
| Inner Steering lock stop missing |2.1.3| | 1 |
| Outer Steering lock stop missing |2.1.3| | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Steering lock stop missing bars foul clocks |2.1.3| | 1 |
| Headlamp at least one does not illuminate on main beam no bulb |1.2.2a|ii|| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Central Front Headlamp aim not tested |4.1.2 |b|| | 1 |
| Central Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Central Front Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Central Front Brake disc contaminated |1.1.14 |b|| | 1 |
| Nearside Rear Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Front Wheel spindle loose Threads have stripped in the fork leg. (5.2.1 (c) (i)) | 1 |
| Rear Suspension arm pin or bush excessively worn swing arm |5.3.4 |a| |i|| | 1 |
| Rear Brake caliper|s| insecure |3.2.A1j| | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Nearside Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride chain link clip |6.2.1h| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Nearside Front Direction indicator incorrect colour (4.4.3 (a)) | 1 |
| Offside Rear Direction indicator incorrect colour (4.4.3 (a)) | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Offside Rear Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Handlebar grip insecure to handlebar both (2.2.1 (d) (ii)) | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Pillion seat insecure (6.2.6 (a) (ii)) | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Front Brake lever insecure adjusting nut missing |1.1.2 |e| |i|| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 1 |
| Drive belt excessively loose |6.1.7 |c| |i|| | 1 |
| Front Chain guard insecure |6.1.7 |i|| | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| All position lamps not working (4.2.1 (a)) | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Steering operation restricted in free movement from lock to lock |2.1.4 |c|| | 1 |
| Rear Wheel spindle loose |5.2.1 |c| |i|| | 1 |
| Rear Brake pedal pivots excessively worn rubbing on swing arm |3.1.3a| | 1 |
| Direction indicators flashing more than 120 times per minute all |1.5.1c| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride offside chain adjuster lock nut insecure |6.2.1h| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride drive chain link clip incorrectly installed |6.2.1h| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride side stand pivot fixing insecure |6.2.1h| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen no beam pattern |1.6.B.1| | 1 |
| Front wheel bearings are excessively rough and slight play |2.3.5b| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Horn not working (7.7 (a)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 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 |
| Centre Front Lower Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Centre Front Upper Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort No rear pads missing |3.3.A1c| | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Front suspension assembly component loose |2.3.1| | 1 |
| Rear suspension bearing has excessive free play Swing arm bearings |2.4.A2a|i|| | 1 |
| Rear shock absorber insecurely mounted Lower bush worn |2.4.A.3b| | 1 |