| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 13 |
| Rear reflector on motorcycle missing |1.4.1| | 10 |
| Horn not working |1.7.3a| | 7 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 6 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Drive chain excessively loose |6.2.1d| | 6 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 5 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 5 |
| Headlamp insecure |1.2.3b| | 4 |
| Nearside Handlebar deformed |2.1.1b| | 4 |
| Offside Front Footrest insecure |6.2.1a| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Offside Handlebar deformed |2.1.1b| | 2 |
| Offside Footrest insecure |6.2.1a| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear reflector on motorcycle obscured |1.4.1| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Registration plate lamp issues | 2 |
| Fuel system component leaking |7.2.1a| | 2 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Rear Brake pedal is damaged and the brake cannot be readily applied |3.1.3c| | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Upper Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Brake component leaking fluid front caliper |3.2.B4| | 1 |
| Centre Rear Lower Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Centre Front Upper Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Centre Front Upper Fairings so located that it is likely to impede the steering |2.1.2e| | 1 |
| Nearside Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Fairing insecure and likely to impede the steering |2.1.2e| | 1 |
| Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Brake lever pivots excessively worn |3.1.3a| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Front Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Rear Brake locking device insecure |3.2.A1e| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Rear Brake disc|s| excessively pitted |3.2.A1l| | 1 |
| Fuel hose leaking |7.2.1a| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Nearside Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Front Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Handlebar fouling on the fuel tank or bodywork on full lock |2.1.4 |b|| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.4 |a|| | 1 |
| Headlamp aim not tested |4.1.2 |b|| | 1 |
| All position lamps not working |4.2.1 |a|| | 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 obscured more than 50% |1.1.1d| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Throttle operating incorrectly throttle housing loose on bar |6.2.1f| | 1 |
| Registration plate issues | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Nearside Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Offside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Direction indicator not working all (4.4.1 (a) (ii)) | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Nearside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected Throttle sticks a various levels |6.2.7 |a| |ii|| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Nearside Handlebar handgrip missing |2.1.1c| | 1 |
| Offside Handlebar handgrip missing |2.1.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| 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 position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Handlebar mounting clamp loose |2.1.1a| | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Offside Headlamp insecure |1.2.3b| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Centre Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Centre Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Drive chain excessively tight, so that it is likely to fail |6.1.7 |k| |ii|| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Central Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort Will not maintain pressure |3.3.A1c| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Hydraulic brake control feels spongy Front and rear |3.1.4a| | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Rear Footrest missing (6.2.12 (a)) | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Offside Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Nearside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Outer Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Central Front Lower Wheel spindle or securing nut(s) so insecure that wheel security or steering control is adversely affected (5.2.1 (c) (ii)) | 1 |
| Nearside Rear Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |