| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 19 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 16 |
| Registration plate issues | 13 |
| Rear reflector on motorcycle missing |1.4.1| | 12 |
| Drive chain excessively loose |6.2.1d| | 10 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 8 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 8 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 7 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 6 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Drive chain worn to excess |6.2.1e| | 5 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 5 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 5 |
| Drive chain excessively tight |6.2.1d| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Horn not working |1.7.3a| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 4 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Rear Brake locking device missing |3.2.A1e| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Offside Front Direction indicator not working |1.5.1c| | 4 |
| Offside Handlebar deformed |2.1.1b| | 3 |
| Registration plate lamp issues | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| An item not tested |Manual| | 2 |
| Fuel system component insecure |7.2.1b| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 2 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 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 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Brake lever insecure |3.1.2a| | 1 |
| Nearside Fuel hose leaking |7.2.1a| | 1 |
| Offside Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Nearside Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Direction indicator missing |1.5.1a| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Direction indicator insecure |1.5.3b| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear reflector defective or damaged by more than 50% of the reflecting surface (4.8.1 (a) (ii)) | 1 |
| Front Brake fluid not visible (1.1.10 (d) (iii)) | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Rear Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Front Brake linked system has a seized caliper pivot. |3.2.B5| | 1 |
| Centre Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Floor brake test Neither brake control achieves an efficiency of 25% |3.3.C1b| | 1 |
| Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Nearside Handlebar mounting clamp loose |2.1.1a| | 1 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 1 |
| Rear Rear position lamp missing |1.1.1a| | 1 |
| Front position lamp missing |1.1.1a| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Offside Front Brake disc|s| securing bolt|s| loose |3.2.A1g| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Rear Brake pedal is inoperative |3.1.3c| | 1 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Brake component is severely distorted |3.1.5| | 1 |
| Front Brake component is excessively corroded |3.1.5| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Front Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Rear Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Centre Front Lower Horn not working |1.7.3a| | 1 |
| Front Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Brake disc|s| cracked |3.2.A1g| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Offside Handlebar handgrip missing |2.1.1c| | 1 |
| Seat insecure |6.2.1a| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 1 |
| Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Centre Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Nearside Handlebar deformed |2.1.1b| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Front Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Rear Brake caliper|s| insecure |3.2.A1j| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Brake locking device missing rear brake anchor |3.2.A1e| | 1 |
| Front Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Centre Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Offside Front Brake disc|s| insecure |3.2.A1g| | 1 |
| Rear Brake component inadequately mounted locking device missing (1.1.21 (c)) | 1 |
| Rear reflector on motorcycle damaged and function impaired |1.4.2a| | 1 |
| Front suspension assembly component missing |2.3.1| | 1 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Brake component damaged and seriously reduced in strength |3.2.A1| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Nearside Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Nearside Front Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Rear Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Chain guard missing |6.2.1c| | 1 |
| Nearside Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Offside Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |