| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 30 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 21 |
| Registration plate issues | 18 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 15 |
| Front wheel bearings have excessive free play |2.3.5b| | 15 |
| Riders seat insecure |6.2.1a| | 14 |
| Rear reflector on motorcycle missing |1.4.1| | 14 |
| Drive chain excessively loose |6.2.1d| | 12 |
| Front wheel bearings are excessively rough |2.3.5b| | 11 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 11 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 7 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 7 |
| Steering headbearing has excessive free play |2.2.2| | 7 |
| Drive chain worn to excess |6.2.1e| | 6 |
| Horn not working |1.7.3a| | 6 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 5 |
| Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 5 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 5 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Drive chain excessively tight |6.2.1d| | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Front suspension has inadequate damping effect. |2.3.6c| | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Offside Rear Direction indicators not working |1.5.1c| | 3 |
| Offside Front Direction indicator not working |1.5.1c| | 3 |
| Rear Drive chain excessively loose |6.2.1d| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Rear Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 2 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 2 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 2 |
| Rear Brake master cylinder insecurely mounted |3.2.B1a| | 2 |
| Drive chain fouling another component |6.2.1d| | 2 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Rear reflector on motorcycle obscured |1.4.1| | 2 |
| Front position lamp incorrect colour |1.1.2a| | 2 |
| Nearside Steering lock stop ineffective |2.1.3| | 2 |
| Position lamp switch insecure |1.1.4b| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Indicator tell tale not functioning |1.5.2| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Nearside Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Headlamp switch faulty |1.2.4| | 2 |
| Rear Footrest missing |6.2.1a| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Steering lock stop missing |2.1.3| | 2 |
| Nearside Steering lock stop missing |2.1.3| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Headlamp switch insecure |1.2.4| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Offside Front Footrest insecure |6.2.1a| | 2 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Front Steering lock stop ineffective |2.1.3| | 2 |
| Stop lamp does not emit a steady light |1.3.1b| | 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 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 2 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Rear Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 2 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Rear position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Offside Rear position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Nearside Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Offside Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Lower Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Offside Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Nearside Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Offside Fairings so located that it is likely to impede the steering |2.1.2e| | 1 |
| Offside Handlebar deformed |2.1.1b| | 1 |
| Nearside Handlebar deformed |2.1.1b| | 1 |
| Rear Seat insecure |6.2.1a| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Front Handlebar mounting clamp bolt missing |2.1.1a| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Stop lamp insecure |1.3.3b| | 1 |
| Upper Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear Wheel corroded significantly reducing the original strength |4.2.1a| | 1 |
| Rear Brake pedal insecure |3.1.2a| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Nearside Front Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Nearside Front Indicator switch insecure |1.5.4| | 1 |
| Offside Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 1 |
| Rear Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Offside Steering lock stop missing |2.1.3| | 1 |
| Rear Brake hose fouling |3.2.B3b| | 1 |
| Position lamp switch faulty |1.1.4a| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| All position lamps adversely affected by the operation of the horn |1.1.3b| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Offside Front Handlebar deformed |2.1.1b| | 1 |
| Front Motorcycle structure adversely modified |6.1.1b| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 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 |
| Nearside Rear Drive chain sprocket excessively loose Slop ring missing |6.1.7 |c| |i|| | 1 |
| Nearside Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Nearside Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Front Direction indicator missing |1.5.1a| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Stop lamp does not illuminate immediately a brake applies FRONT |1.3.1a| | 1 |
| Stop lamp not working FRONT BRAKE |4.3.1 |a| |ii|| | 1 |
| Rear Brake pedal is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Brake fluid reservoir insecurely mounted |3.2.B1a| | 1 |
| Lower Rear reflector on motorcycle missing |1.4.1| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Front Brake disc|s| insecure |3.2.A1g| | 1 |
| Brake lever has inadequate reserve travel front |3.1.3b| | 1 |
| Direction indicators not working front and rear |1.5.1c| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Nearside Front Motorcycle structure cracked |6.1.1a| | 1 |
| Offside Front Motorcycle structure cracked |6.1.1a| | 1 |
| Rear Rear position lamp insecure |1.1.1c| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Front Front position lamp flickers when tapped lightly by hand |1.1.3c| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Front Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Front Handlebar deformed |2.1.1b| | 1 |
| Front Riders seat insecure |6.2.1a| | 1 |
| Front Clutch lever bent so it cannot be readily operated. |6.2.1g| | 1 |
| Nearside Front Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on (1.1.3a) | 1 |
| Offside Front shock absorber seal failed and leaking oil (2.3.3) | 1 |
| Rear Seat insecure (6.2.1a) | 1 |
| Exhaust mounting does not fully support the exhaust system (7.1.1.c) | 1 |
| Offside Rear Footrest insecure (6.2.1a) | 1 |
| Rear wheel bearings have excessive free play (2.4.A.2c) | 1 |
| Drive chain excessively loose (6.2.1d) | 1 |
| Rear Drive chain sprocket carrier worn to excess (6.2.1e) | 1 |
| Nearside Rear Footrest missing (6.2.1a) | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 1 |
| Direction indicator flashing more than 120 times per minute (1.5.1c) | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort (3.3.A1d) | 1 |
| Offside Front Front shock absorber seal failed and leaking oil (2.3.3) | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil (2.3.3) | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 1 |
| Offside Front Direction indicator not working (1.5.1c) | 1 |
| Offside Rear Brake lever is bent and the brake cannot be readily applied (3.1.3c) | 1 |
| Centre Rear Rear position lamp does not illuminate immediately when it is switched on (1.1.3a) | 1 |
| Centre Front Brake master cylinder fluid level dangerously low (3.2.B1d) | 1 |
| Rear Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Rear reflector on motorcycle deteriorated and function impaired |1.4.2a| | 1 |
| Front position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Brake pedal insecure |3.1.2a| | 1 |
| Brake pedal attachment screws loose |3.1.2b| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Front Brake disc|s| securing bolt|s| missing |3.2.A1g| | 1 |
| Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Front Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Rear Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Brake lever insecure |3.1.2a| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Nearside 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 |
| Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Footrest missing both |6.2.12 |a|| | 1 |
| Rear Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Front Direction indicator insecure |1.5.3b| | 1 |
| Nearside Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Front Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Front wheel spindle securing nut locking device insecure |2.3.3a| | 1 |
| Nearside Indicator switch insecure |1.5.4| | 1 |
| Fairing so located that it is likely to impede the steering |2.1.2e| | 1 |
| Front Brake disc|s| securing bolt|s| loose |3.2.A1g| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Front Brake component leaking fluid |3.2.B4| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Front Brake hose stretched by steering movement |3.2.B3b| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |