| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 32 |
| Headlamp aim out of alignment | 28 |
| Drive chain excessively loose |6.2.1d| | 19 |
| Registration plate issues | 17 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 10 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 7 |
| Drive chain worn to excess |6.2.1e| | 7 |
| Registration plate lamp issues | 5 |
| Nearside Rear Direction indicator not working |1.5.1c| | 5 |
| Horn not working |1.7.3a| | 5 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 5 |
| Nearside Rear Footrest missing |6.2.1a| | 5 |
| Offside Rear Footrest missing |6.2.1a| | 5 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear reflector missing (4.8.2 (a) (ii)) | 5 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 4 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Offside Rear Direction indicator not working |1.5.1c| | 4 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Headlamp insecure |1.2.3b| | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Rear reflector missing |4.8.2 |a| |ii|| | 4 |
| Offside Rear Direction indicators not working |1.5.1c| | 4 |
| Fuel cap sealing washer missing |7.2.2c| | 3 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 3 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 3 |
| Rear Brake excessively binding (1.2.1 (f)) | 3 |
| Offside Rear Direction indicator insecure |1.5.3b| | 3 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Front position lamp incorrect colour |1.1.2a| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| 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| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Direction indicators not working |1.5.1c| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 2 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 2 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Chain guard insecure |6.2.1c| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Stop lamp does not illuminate immediately a brake applies front brake |1.3.1a| | 2 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 2 |
| Decelerometer brake test no brake control achieves an efficiency of 30% |3.3.E1a| | 2 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Rear Brake master cylinder defective but brake still operating (1.1.10 (b) (i)) | 1 |
| Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front Brake caliper|s| insecure |3.2.A1j| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Rear Rear position lamp missing |1.1.1a| | 1 |
| Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear reflector on sidecar missing |1.4.1| | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Nearside Front Direction indicator with a multiple light source more than 1/2 not functioning (4.4.1 (a) (ii)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Headlamp insecure |4.1.1 |c|| | 1 |
| Direction indicator insecure |1.5.3b| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Rear Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Nearside Indicator switch insecure |1.5.4| | 1 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Front Wheel excessively distorted |5.2.2 |c| |i|| | 1 |
| Rear Footrest missing |6.2.12 |a|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Rear position lamp obscured more than 50% |1.1.1d| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Exhaust system insecure (6.1.2 (a)) | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Brake lever is positioned so that the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Rear Brake has no recorded effort at a wheel (1.2.1 (a) (ii)) | 1 |
| Stop lamp does not illuminate immediately a brake applies Not working from front brake lever |1.3.1a| | 1 |
| Rear Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Front Brake disc contaminated |1.1.14 |b|| | 1 |
| Offside Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Exhaust mounting missing |7.1.1c| | 1 |
| Handlebar mounting clamp bolt missing |2.1.1a| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Direction indicators flashing more than 120 times per minute all 4
|1.5.1c| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Rear Brake component inadequately mounted rear brake return spring fitted incorrectly (1.1.21 (c)) | 1 |
| Suspension component mounting has an unsafe modification rear lower shock bolt too short (5.3.3 (c) (i)) | 1 |
| Front Brake hose excessively twisted front brake reservoir to master cylinder hose kinked (1.1.12 (b) (ii)) | 1 |
| Headlamp not working on dipped beam Goes out when handlebars turned |4.1.1 |a| |ii|| | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Throttle operating incorrectly grip sticking on handguard |6.2.1f| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Front Brake hose stretched by suspension movement catching on speedo mount |3.2.B3b| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded rear brake pedal sticking and no return spring fitted |3.2.A1h| | 1 |
| Front Stop lamp missing no front switch fitted |1.3.3a| | 1 |
| Headlamp light source and lamp not compatible |4.1.4 |c|| | 1 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Exhaust is leaking and excessively noisey silencer to front pipe joint perished |7.1.1b| | 1 |
| Rear reflector on motorcycle incorrectly positioned not central |1.4.2d| | 1 |
| Drive chain excessively loose ADJUSTED |6.1.7 |c| |i|| | 1 |
| Offside Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear wheel bearings have excessive free play causing rear disc to bind in caliper |2.4.A.2c| | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Offside Front Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Stop lamp not working when rear brake applied (4.3.1 (a) (ii)) | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Front Headlamp insecure (4.1.1 (c)) | 1 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Headlamp light intensity severely reduced Low and high on together (4.1.4 (a)) | 1 |
| Steering operation impeded by a fairing Hitting the horn (2.1.4 (e)) | 1 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Offside Front Sidecar front position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Direction indicator obscured |1.5.1a| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Horn not working (7.7 (a)) | 1 |
| Rear Footrest missing (6.2.12 (a)) | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Brake lever is so short that the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Footrest missing pilion foot rests missing (6.2.12 (a)) | 1 |
| Rear Brake master cylinder leaking |1.1.10 |b| |ii|| | 1 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Nearside Front Direction indicator obscured |1.5.1a| | 1 |
| Offside Front Direction indicator obscured |1.5.1a| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride chain horseshoe link |6.2.1h| | 1 |
| Front shock absorber seal failed and leaking oil both |2.3.3| | 1 |
| Stop lamp does not emit a steady light op 1 |1.3.1b| | 1 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Front Brake component has an inadequate repair brake fluid reservoir return pipe kinked, cable tied and damp with fluid |3.1.5| | 1 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Nearside Rear All direction indicators missing |4.4.1 |a| |ii|| | 1 |
| Offside Rear All direction indicators missing |4.4.1 |a| |ii|| | 1 |
| Brake caliper|s| insecure |3.2.A1j| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Brake performance not tested |3.3| | 1 |
| All direction indicators not working not flashing (4.4.1 (a) (ii)) | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Front Throttle operating incorrectly |6.2.1f| | 1 |
| Front Lower Brake hose fouling |3.2.B3b| | 1 |
| Nearside Front Lower Brake locking device insecure split washer to large for securing caliper |3.2.A1e| | 1 |
| Rear Brake pedal cannot be applied smoothly brake pedal return spring missing |3.1.3d| | 1 |
| Nearside Rear Drive chain excessively tight |6.2.1d| | 1 |
| Offside Front Horn control not functioning. |1.7.2b| | 1 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Drive chain horseshoe locking device likely to become detached |6.1.7 |j| |ii|| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Headlamp dipped beam affected by the operation of the horn |1.2.2c| | 1 |
| Headlamp main beam affected by the operation of the horn |1.2.2c| | 1 |
| All position lamps adversely affected by the operation of the horn |1.1.3b| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Stop lamp affected by the operation of the horn |1.3.2| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Lower Suspension arm pin or bush excessively worn |5.3.4 |a| |i|| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected |6.2.7 |a| |ii|| | 1 |
| Throttle operating incorrectly |6.2.7 |a| |i|| | 1 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Decelerometer brake test neither brake control achieves an efficiency of 25% |3.3.E1c| | 1 |
| Offside Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Nearside Rear Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition |8.1.1 |a|| | 1 |
| Central Front Headlamp light intensity severely reduced |4.1.4 |a|| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Rear Brake disc|s| cracked |3.2.A1g| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Rear Rear wheel spindle loose |2.4.A.2b| | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Rear 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 |
| Rear Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear Built up wheel has a loose bolt/s |4.2.1c| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear Brake lagging in operation (1.2.1 (d)) | 1 |
| Offside Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |