| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 59 |
| Drive chain excessively loose |6.2.1d| | 31 |
| Rear reflector on motorcycle missing |1.4.1| | 18 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 18 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 17 |
| Drive chain worn to excess |6.2.1e| | 16 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 12 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 11 |
| Front wheel bearings are excessively rough |2.3.5b| | 10 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 7 |
| Registration plate issues | 7 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 7 |
| Riders seat insecure |6.2.1a| | 6 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Steering headbearing has excessive free play |2.2.2| | 6 |
| Front wheel bearings have excessive free play |2.3.5b| | 6 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 6 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 5 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Drive chain excessively tight |6.2.1d| | 5 |
| Rear reflector on motorcycle obscured |1.4.1| | 5 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Handlebar deformed |2.1.1b| | 4 |
| Headlamp insecure |1.2.3b| | 4 |
| Nearside Rear Direction indicator not working |1.5.1c| | 4 |
| Rear Drive chain excessively loose |6.2.1d| | 4 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 3 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 3 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 3 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 3 |
| Horn not working |1.7.3a| | 3 |
| Offside Rear Direction indicator insecure |1.5.3b| | 3 |
| Rear Drive chain worn to excess |6.2.1e| | 3 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Headlamp switch insecure |1.2.4| | 2 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Nearside Rear Direction indicators not working (1.5.1c) | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on (1.1.3a) | 2 |
| Rear reflector on motorcycle missing (1.4.1) | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Front wheel bearings are excessively rough (2.3.5b) | 2 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Nearside Front Upper Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Rear Position lamp not working |4.2.1 |a|| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Stop lamp not working front & rear (4.3.1 (a) (ii)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Rear mono-shock insecure |2.4.B.4| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Brake pedal has insufficient reserve travel |1.1.2 |a|| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Offside Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Nearside Rear Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Drive chain excessively loose (6.2.1d) | 1 |
| Rear Exhaust mounting missing |7.1.1c| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Chain guard fouling another component |6.2.1c| | 1 |
| Nearside Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Offside Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front Brake caliper insecure (1.1.16 (c) (i)) | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Rear reflector on motorcycle obscured |1.4.2b| | 1 |
| Nearside Rear Footrest insecure Split pin missing |replaced|. |6.2.1a| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied (3.1.3c) | 1 |
| Front Wheel spoke excessively loose (4.2.1b) | 1 |
| Nearside Handlebar handgrip not secure to handlebars. (2.1.1c) | 1 |
| Front shock absorber seal failed and leaking oil (2.3.3) | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Rear Brake pedal is bent and the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Front Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Upper Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Rear Shock absorber insecurely attached (5.3.2 (a) (i)) | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Nearside Front Shock absorber has a serious fluid leak fork seal (5.3.2 (b)) | 1 |
| Stop lamp not working front control (4.3.1 (a) (ii)) | 1 |
| Throttle operating incorrectly sticking at high engine speed (6.2.7 (a) (i)) | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride split link clip on wrong way |6.2.1h| | 1 |
| Offside Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Brake pedal attachment screws missing. |3.1.2b| | 1 |
| Nearside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Headlamp aim headlamp damaged and function impaired lens insecure |1.2.3a| | 1 |
| Front suspension assembly component excessively bent |2.3.1| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Rear Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Rear reflector on motorcycle deteriorated and function impaired |1.4.2a| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Front Stop lamp missing |1.3.3a| | 1 |
| Rear Rear suspension has an inadequate repair of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Rear Brake linkage has abnormal movement due to excessive wear |3.2.A1i| | 1 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear position lamp flickers when tapped lightly by hand |1.1.3c| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Rear Drive chain sprocket worn to excess (6.2.1e) | 1 |
| Drive chain worn to excess (6.2.1e) | 1 |
| Rear reflector defective or damaged by more than 50% of the reflecting surface |4.8.1 |a| |ii|| | 1 |
| Registration plate lamp issues | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected insecurely mounted |6.2.7 |a| |ii|| | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Rear Lower Suspension component pin or bush excessively worn shock absorber bush |5.3.4 |a| |i|| | 1 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Nearside Rear Direction indicator missing |1.5.1a| | 1 |
| Offside Rear Footrest insecure (6.2.12 (a)) | 1 |
| Offside Front Brake caliper insecure (1.1.16 (c) (i)) | 1 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Rear Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Rear Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Front Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| An item not tested |Manual| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Rear Lower Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Rear Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Brake linkage has abnormal movement of levers indicating excessive wear or maladjustment (1.1.15 (f)) | 1 |
| Rear Drive chain sprocket so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Offside Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Headlamp dipped beam flickers when tapped lightly by hand |1.2.2c| | 1 |
| Offside Brake rod insecure |1.1.15 |c|| | 1 |
| Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Front Brake pipe union leaking fluid |3.2.B4| | 1 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 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 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Nearside Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Offside Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 1 |
| Offside Rear Footrest missing (6.2.12 (a)) | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Centre Rear Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Front wheel bearings are excessively tight Front wheel bearing is noisey |2.3.5b| | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Nearside Rear Footrest insecure |6.2.12 |a|| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Roller brake test No brake control achieves an efficiency of 30% (1.2.2 (a) (i)) | 1 |
| Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Front Brake performance not tested |3.3| | 1 |
| Front Braking system does not have an approriate system/s fitted according to its age |3.1.1| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Drive chain excessively tight, so that it is likely to fail |6.1.7 |k| |ii|| | 1 |
| Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Front Position lamp not working dipped beam (4.2.1 (a)) | 1 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |