| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 17 |
| Headlamp aim out of alignment | 13 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 11 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 10 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 8 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Front Wheel spoke excessively loose |4.2.1b| | 7 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Horn not working |1.7.3a| | 6 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Steering headbearing has excessive free play |2.2.2| | 5 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 5 |
| Drive chain excessively loose |6.2.1d| | 5 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 5 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Drive chain excessively tight |6.2.1d| | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Headlamp aim not tested |1.6| | 4 |
| Registration plate issues | 3 |
| 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| | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Rear Wheel spoke excessively loose |4.2.1b| | 3 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Front Steering headbearing has excessive free play |2.2.2| | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Rear Footrest missing |6.2.1a| | 3 |
| Nearside Rear Direction indicator missing |1.5.1a| | 2 |
| Rear Brake disc|s| cracked |3.2.A1g| | 2 |
| Nearside Rear Footrest insecure |6.2.1a| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Indicator tell tale not functioning |1.5.2| | 2 |
| Front Direction indicator insecure |1.5.3b| | 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 suspension has inadequate damping effect. |2.3.6c| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Shock absorber has a serious fluid leak both front (5.3.2 (b)) | 1 |
| Front wheel spindle securing nut|s| loose |2.3.5a| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Offside Rear Direction indicator missing |1.5.1a| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Rear Stop lamp not working |1.2.1b| | 1 |
| Parking brake: efficiency below requirements |3.7.B.7| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Brake lever mounting insecure |3.1.2a| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Brake pedal mounting insecure |3.1.2a| | 1 |
| Brake pedal is inoperative |3.1.3c| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Throttle operating incorrectly |6.2.1f| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| An item not tested |Manual| | 1 |
| Front suspension assembly component loose |2.3.1| | 1 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear Drive chain fouling another component |6.2.1d| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Nearside Front suspension assembly component excessively corroded. |2.3.1| | 1 |
| Nearside Front Exhaust mounting missing |7.1.1c| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Nearside Drive chain worn to excess |6.2.1e| | 1 |
| Offside Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Centre Rear Upper Rear reflector on motorcycle missing |1.4.1| | 1 |
| Nearside Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front wheel spindle loose |2.3.5a| | 1 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Rear Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front suspension assembly component missing |2.3.1| | 1 |
| Front Braking system does not have an approriate system/s fitted according to its age |3.1.1| | 1 |
| Plate brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.B2b| | 1 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Front Handlebar deformed |2.1.1b| | 1 |
| Offside Front Throttle operating incorrectly |6.2.1f| | 1 |
| Front Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Footrest insecure |6.2.1a| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Indicator switch defective |1.5.4| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Headlamp switch insecure |1.2.4| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Steering lock stop ineffective |2.1.3| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Front Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Front Front suspension assembly component loose |2.3.1| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Exhaust has part of the system missing |7.1.1a| | 1 |
| Fuel tank leaking |7.2.1a| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Fuel cap does not fasten securely by a positive means |7.2.2b| | 1 |
| Fuel cap sealing washer missing |7.2.2c| | 1 |
| Front Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Lower Fuel system component leaking |7.2.1a| | 1 |
| Rear Lower Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |