| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 29 |
| Rear reflector on motorcycle missing |1.4.1| | 28 |
| Headlamp aim beam image kick up to the offside |1.6| | 13 |
| Registration plate issues | 10 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 8 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 7 |
| Horn not working |1.7.3a| | 7 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 7 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 6 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Steering headbearing has excessive free play |2.2.2| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Drive chain excessively tight |6.2.1d| | 5 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Offside Rear Footrest missing |6.2.1a| | 4 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 3 |
| Nearside Rear Footrest missing |6.2.1a| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Offside Footrest insecure |6.2.1a| | 3 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 3 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Offside Front Direction indicator not working |1.5.1c| | 3 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Indicator tell tale not functioning |1.5.2| | 2 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Rear Footrest missing |6.2.1a| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Front Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Offside Handlebar deformed |2.1.1b| | 2 |
| Fuel system component insecure |7.2.1b| | 2 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 2 |
| Rear Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 2 |
| Headlamp switch insecure |1.2.4| | 2 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Rear reflector on motorcycle obscured |1.4.1| | 2 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Rear Exhaust mounting missing |7.1.1c| | 1 |
| Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Direction indicators affected by the operation of another lamp indicators not flashing |1.5.1c| | 1 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride split pin missing on rear axle castle nut |6.2.1h| | 1 |
| Nearside Front Direction indicator obscured |1.5.1a| | 1 |
| Offside Front Direction indicator obscured |1.5.1a| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Front Headlamp damaged and function impaired |1.2.3a| | 1 |
| Front Brake cylinder insecurely mounted |3.2.B1a| | 1 |
| Footrest insecure |6.2.1a| | 1 |
| Steering lock stop maladjusted |2.1.3| | 1 |
| Front position lamp flickers when tapped lightly by hand |1.1.3c| | 1 |
| Rear position lamp flickers when tapped lightly by hand |1.1.3c| | 1 |
| Nearside Front Upper Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Front Upper Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Rear Upper Drive chain worn to excess |6.2.1e| | 1 |
| Nearside Front Upper Fuel hose leaking |7.2.1a| | 1 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Position lamp switch insecure |1.1.4b| | 1 |
| Nearside Front Handlebar deformed |2.1.1b| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Fuel hose leaking |7.2.1a| | 1 |
| Front Fork yoke deformed |2.1.1b| | 1 |
| Front Brake component leaking fluid |3.2.B4| | 1 |
| Horn control not readily accesible. |1.7.2a| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 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 Brake pedal cracked |3.1.2c| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Inner Rear Lower Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Brake component has an inadequate repair |3.1.5| | 1 |
| Nearside Handlebar mounting clamp loose |2.1.1a| | 1 |
| Nearside Handlebar deformed |2.1.1b| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Direction indicator missing |1.5.1a| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Centre Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Nearside 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 |
| Centre Front Riders seat insecure |6.2.1a| | 1 |
| Centre Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Nearside Motorcycle structure cracked |6.1.1a| | 1 |
| Brake hose excessively deteriorated | 1 |
| Fuel pipe leaking |7.2.1a| | 1 |
| Horn not working (7.7 (a)) | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Handlebar excessively deformed (2.2.1 (c) (i)) | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Front Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Headlamp dipped beam flickers when tapped lightly by hand |1.2.2c| | 1 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Nearside Front Upper Headlamp switch faulty |1.2.4| | 1 |
| Drive chain excessively loose |6.2.1d| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 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 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| All direction indicators adversely affected by the operation of another lamp |4.4.3 |b|| | 1 |
| Offside Front Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Offside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Front Headlamp missing |1.2.3a| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Front suspension assembly component missing |2.3.1| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Offside Rear Rear 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 |
| Nearside Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Nearside Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Rear position lamp insecure |1.1.1c| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Centre Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Stop lamp adversely affected by the operation of another lamp |4.3.3 |b|| | 1 |
| Rear Position lamp adversely affected by the operation of another lamp |4.2.3 |b|| | 1 |
| Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Direction indicator insecure |1.5.3b| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Nearside Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Offside Front suspension assembly component missing |2.3.1| | 1 |
| Gradient brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.D1b| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Central Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Brake pedal is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Centre Rear Lower Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Offside Front Upper Throttle operating incorrectly |6.2.1f| | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 1 |
| Brake lever has abnormal movement of levers indicating excessive wear or maladjustment Front brake lever operation stiff (1.1.15 (f)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |