| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 47 |
| Drive chain excessively loose |6.2.1d| | 20 |
| Headlamp insecure |1.2.3b| | 16 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 13 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 11 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 10 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 10 |
| Registration plate issues | 9 |
| Registration plate lamp issues | 8 |
| Stop lamp remains on when the brake is released |1.3.1e| | 8 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 8 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 7 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 6 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 6 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 6 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 5 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 5 |
| Drive chain worn to excess |6.2.1e| | 5 |
| Riders seat insecure |6.2.1a| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Horn not working |1.7.3a| | 4 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 4 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Brake pedal cannot be released smoothly |3.1.3d| | 4 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 3 |
| Direction indicator not working |1.5.1c| | 3 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Lower Steering headbearing has excessive free play |2.2.2| | 3 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 3 |
| Front Wheel spoke excessively loose |4.2.1b| | 3 |
| Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Front suspension has inadequate damping effect. |2.3.6c| | 3 |
| Horn is not a constant note |1.7.3c| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Rear Wheel spoke excessively loose |4.2.1b| | 3 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 3 |
| Centre Front Lower Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Centre Front Headlamp aim not tested |1.6| | 2 |
| Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 2 |
| Front Footrest insecure |6.2.1a| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Front Headlamp insecure |1.2.3b| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Front position lamp insecure |1.1.1c| | 2 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front suspension assembly component excessively bent |2.3.1| | 2 |
| Nearside Footrest missing |6.2.1a| | 2 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 2 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Nearside Indicator tell tale not functioning |1.5.2| | 2 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Horn sound not in accordance with requirements (7.7 (c)) | 2 |
| An item not tested |Manual| | 2 |
| Nearside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Central Rear Upper Stop lamp adversely affected by the operation of another lamp (4.3.3 (b)) | 1 |
| Rear Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 1 |
| Offside Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Centre Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Offside Rear Brake locking device missing |3.2.A1e| | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Stop lamp does not illuminate immediately a brake applies via rear brake |1.3.1a| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Headlamp aim not tested Headlight insecure |1.6| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Wheel spindle loose (5.2.1 (c) (i)) | 1 |
| Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Offside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Offside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Horn emits 2 or more alternating tones |1.7.3b| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Footrest insecure |6.2.1a| | 1 |
| Direction indicators affected by the operation of another lamp affecting tail lamp causing tail lamp to flash alternately with indicators |1.5.1c| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Front Riders seat insecure |6.2.1a| | 1 |
| Rear Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Nearside Indicator switch defective |1.5.4| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Offside Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Exhaust has part of the system missing |7.1.1a| | 1 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Front Brake disc|s| excessively pitted |3.2.A1l| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Fairing insecure and likely to impede the steering |2.1.2e| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Offside Indicator tell tale not functioning |1.5.2| | 1 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Headlamp aim not tested |1.6| | 1 |
| Front wheel bearings are excessively tight |2.3.5b| | 1 |
| Exhaust excessively deteriorated insecure |7.1.1a| | 1 |
| Offside Front Brake disc|s| excessively worn Front brake disc worn |3.2.A1l| | 1 |
| Front Steering headbearing has excessive free play Front headrace bearings worn |2.2.2| | 1 |
| Nearside Rear Rear shock absorber seal failed and leaking oil Nearside rear shock absorber excessively leaking oil |2.4.A.1c| | 1 |
| Nearside Front Footrest missing Nearside riders foot peg rubber missing |6.2.1a| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies Rear brake light not iluminating |1.3.1a| | 1 |
| Offside Front Handlebar handgrip not secure to handlebars. Offside handle bar grip insecure |2.1.1c| | 1 |
| Rear Engine mounting/bracket excessively loose |6.1.8 |a| |ii|| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Footrest missing |6.2.1a| | 1 |
| Stop lamp does not emit a steady light NOT WORKING
With front brake |1.3.1b| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Footrest missing |6.2.1a| | 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 |6.2.1h| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Footrest missing both (6.2.12 (a)) | 1 |
| Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Brake grabbing severely |1.2.1 |c|| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Footrest missing |6.2.1a| | 1 |
| Rear Brake lining|s| less than 1.0 mm thick |1.1.13 |a|| | 1 |
| Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Drive chain sprocket excessively loose |6.1.7 |c| |i|| | 1 |
| Nearside Rear Direction indicator likely to become detached |4.4.1 |c| |ii|| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Front Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Fairing so located that it is likely to impede the steering |2.1.2e| | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| All direction indicators adversely affected by the operation of another lamp (4.4.3 (b)) | 1 |
| Front Decelerometer brake test indicates a binding brake |3.3.E1d| | 1 |
| Rear Decelerometer brake test indicates a sticking brake |3.3.E1d| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Nearside Rear Wheel spoke excessively loose 6 |4.2.1b| | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Centre Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Brake linkage excessively corroded |3.2.A1c| | 1 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Stop lamp adversely affected by the operation of another lamp it flashes with the indicators (4.3.3 (b)) | 1 |
| Nearside Front Fairings insecure and likely to impede the steering (2.1.2e) | 1 |
| Motorcycle structure excessively distorted |6.1.1a| | 1 |
| Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Rear Brake pedal pivot excessively tight brake lever seized (1.1.1 (a)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Fuel system component leaking Carb (6.1.3 (b) (i)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Fuel system component leaking (6.1.3 (b) (i)) | 1 |
| Nearside Rear Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear Rear position lamp adversely affected by the operation of another lamp indicator affects rear lights |1.1.3b| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Offside Rear Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Nearside Fuel pipe leaking |7.2.1a| | 1 |
| Offside Rear Lower Brake pivot has restricted free movement seized on center stand / brake shaft (1.1.15 (e)) | 1 |
| Central Front Lower Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Brake pedal pivot excessively tight |1.1.1 |a|| | 1 |