| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 41 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 26 |
| Headlamp aim out of alignment | 23 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 21 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 18 |
| Drive chain worn to excess |6.2.1e| | 14 |
| Horn not working |1.7.3a| | 13 |
| Drive chain excessively loose |6.2.1d| | 13 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 13 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Registration plate issues | 12 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 10 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Front wheel bearings have excessive free play |2.3.5b| | 9 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 9 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 9 |
| Rear reflector on motorcycle obscured |1.4.1| | 8 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 8 |
| Direction indicators not working |1.5.1c| | 7 |
| Fuel cap sealing washer missing |7.2.2c| | 7 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 6 |
| Nearside Front Direction indicator not working |1.5.1c| | 6 |
| 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| | 6 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Nearside Rear Direction indicator not working |1.5.1c| | 5 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 4 |
| Rear position lamp insecure |1.1.1c| | 4 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Offside Front Direction indicator not working |1.5.1c| | 4 |
| Drive chain excessively tight |6.2.1d| | 4 |
| Nearside Rear Footrest missing |6.2.1a| | 4 |
| Offside Rear Footrest missing |6.2.1a| | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Offside Direction indicator not working |1.5.1c| | 3 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Handlebar deformed |2.1.1b| | 3 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 3 |
| Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Front Direction indicator not working |1.5.1c| | 3 |
| Nearside Direction indicator not working |1.5.1c| | 3 |
| Rear Direction indicators not working |1.5.1c| | 3 |
| Offside Rear Direction indicators not working |1.5.1c| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Front Direction indicators not working |1.5.1c| | 3 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 3 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Offside Front Direction indicators not working |1.5.1c| | 3 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 3 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 2 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Headlamp switch insecure |1.2.4| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Rear Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 2 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Drive chain fouling another component |6.2.1d| | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Indicator switch insecure |1.5.4| | 2 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 2 |
| Rear Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 2 |
| Rear Direction indicator not working |1.5.1c| | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Front position lamp incorrect colour |1.1.2a| | 2 |
| Indicator switch defective |1.5.4| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Offside Front Direction indicator insecure |1.5.3b| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Footrest missing |6.2.1a| | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Brake caliper|s| insecure |3.2.A1j| | 1 |
| Rear Wheel spoke cracked. |4.2.1b| | 1 |
| Offside Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Inner Indicator switch does not operate the direction indicators on the side selected |1.5.4| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front wheel spindle securing nut|s| loose |2.3.3a| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Front suspension assembly component loose |2.3.1| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Upper Direction indicators not working |1.5.1c| | 1 |
| Rear Upper Direction indicators not working |1.5.1c| | 1 |
| Offside Rear Exhaust mounting missing |7.1.1c| | 1 |
| Nearside Front Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Centre Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Offside Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Centre Front Motorcycle structure adversely modified |6.1.1b| | 1 |
| Nearside Headlamp switch insecure |1.2.4| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 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 |
| Steering operation linkage fouling when handlebars turned from lock to lock |2.1.4 |a|| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Rear reflector on motorcycle deteriorated and function impaired |1.4.2a| | 1 |
| Nearside Rear Drive chain worn to excess |6.2.1e| | 1 |
| Centre Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Stop lamp not working Control 2 (4.3.1 (a) (ii)) | 1 |
| Offside Front suspension assembly component loose |2.3.1| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Front Horn control defective |1.7.2a| | 1 |
| Front Steering lock stop missing |2.1.3| | 1 |
| Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Fuel cap leaking (6.1.3 (b) (i)) | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Rear Brake hose leaking (1.1.12 (c)) | 1 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Front Exhaust system insecure (6.1.2 (a)) | 1 |
| Rear Brake pedal not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 1 |
| Drive chain horseshoe locking device likely to become detached detached (6.1.7 (j) (ii)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected cover missing (6.2.7 (a) (ii)) | 1 |
| Handlebar retaining device missing clutch lever (2.2.1 (b) (i)) | 1 |
| Front Handlebar retaining device missing brake lever (2.2.1 (b) (i)) | 1 |
| Brake lever is so short that the brake cannot be readily applied |1.1.2 |d|| | 1 |
| Brake pedal pivot excessively worn |1.1.1 |b|| | 1 |
| All position lamps not working |4.2.1 |a|| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Steering operation restricted in free movement from lock to lock |2.1.4 |c|| | 1 |
| Headlamp insecure |4.1.1 |c|| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Rear Brake pipe inadequately supported hydraulic feed hose from reservoir |3.2.B2b| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system silencer |7.1.1.c| | 1 |
| Throttle operating incorrectly cable insecure |6.2.1f| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 1 |
| Rear Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 1 |
| Brake lever insecure |3.1.2a| | 1 |
| Rear suspension bearing has excessive free play swing arm pivot |2.4.A2a|i|| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Front Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Offside Front Direction indicator missing |1.5.1a| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Rear Hydraulic brake control creeps under load. |3.1.4a| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Brake pedal is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Offside Front Steering lock stop missing |2.1.3| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Motorcycle structure adversely modified |6.1.1b| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Offside Steering lock stop missing |2.1.3| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Footrest missing |6.2.1a| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Front Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Rear reflector on motorcycle obscured |1.4.2b| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on rear light does not work |1.1.3a| | 1 |
| Rear Stop lamp does not emit a steady light not working with control 1 |1.3.1b| | 1 |
| Rear Stop lamp does not emit a steady light does not work with control 2 |1.3.1b| | 1 |
| Rear Wheel spoke missing rear wheel has spoke missing |4.2.1b| | 1 |
| Nearside Front Headlamp switch insecure light control insecure |1.2.4| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Front Front position lamp incorrect colour |1.1.2a| | 1 |
| Nearside Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Offside Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Rear Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Front Front suspension assembly component excessively bent |2.3.1| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Nearside Position lamp switch insecure |1.1.4b| | 1 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Fuel tank leaking |7.2.1a| | 1 |
| Fuel tank leaking |7.2.1a| | 1 |
| Front Brake hose leaking fluid |3.2.B4| | 1 |
| Front Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Rear Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Front Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Rear wheel spindle loose |2.4.A.2b| | 1 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Exhaust mounting missing |7.1.1c| | 1 |
| Brake performance not tested |3.3| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Front Brake hose fouling |3.2.B3b| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Sidecar rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Steering lock stop ineffective |2.1.3| | 1 |
| Front Direction indicator insecure |1.5.3b| | 1 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Front Brake lever excessively damaged |3.2.A1c| | 1 |
| Exhaust mounting does not fully support the exhaust system fouling on rear coil spring |7.1.1.c| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front Direction indicator missing |1.5.1a| | 1 |
| Rear Direction indicator missing |1.5.1a| | 1 |