| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 29 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 11 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 9 |
| Registration plate issues | 7 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 6 |
| Horn not working |1.7.3a| | 5 |
| Fuel system component leaking |7.2.1a| | 5 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Drive chain excessively loose |6.2.1d| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 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 |
| Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Headlamp dipped beam affected by the operation of the horn |1.2.2c| | 1 |
| Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Headlamp dipped beam affected by the operation of another lamp both dip beams dim appears to trying to light up both filaments |1.2.2c| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Exhaust has part of the system missing |7.1.1a| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Centre Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Footrest insecure |6.2.1a| | 1 |
| Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Offside Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Offside Steering lock stop maladjusted |2.1.3| | 1 |
| Rear Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Front Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front suspension fouling which affects the movement of the front suspension. |2.3.6a| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Front Brake hose leaking fluid |3.2.B4| | 1 |
| Fuel tank leaking |7.2.1a| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Front Roller brake test indicates a binding brake (3.3.A1a) | 1 |
| Front position lamp does 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 |
| Rear suspension has corrosion which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Offside Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Brake pedal is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Horn control not readily accesible. |1.7.2a| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |