| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 26 |
| Registration plate issues | 19 |
| Drive chain excessively loose |6.2.1d| | 6 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear reflector on motorcycle missing |1.4.1| | 5 |
| Horn not working |1.7.3a| | 5 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Front wheel bearings are excessively rough |2.3.5b| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 3 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 3 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 2 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition (8.1.1 (a)) | 2 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls not working off front (4.3.2 (a) (iii)) | 1 |
| Fuel hose leaking |7.2.1a| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Rear Drive chain sprocket carrier worn to excess play in rear sprocket carrier |6.2.1e| | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Nearside Rear Direction indicator obviously incorrectly positioned Facing upwards (4.4.3 (a)) | 1 |
| Nearside Rear Direction indicator likely to become detached Loose (4.4.1 (c) (ii)) | 1 |
| Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Nearside Direction indicator insecure |1.5.3b| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Front Footrest insecure |6.2.1a| | 1 |
| Front Wheel spoke excessively loose x 4 |4.2.1b| | 1 |
| Fork yoke insecure top (2.2.2 (d) (i)) | 1 |
| Stop lamp does not illuminate immediately a brake applies hand |1.3.1a| | 1 |
| Stop lamp not working lever |4.3.1 |a| |ii|| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Stop lamp obscured |1.3.1c| | 1 |
| Stop lamp not working front brake |4.3.1 |a| |ii|| | 1 |
| Throttle operating incorrectly Does not return automatically in all steering positions |6.2.1f| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 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 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Rear Drive chain worn to excess |6.2.1e| | 1 |
| Nearside Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Rear brake binding | 1 |
| Rear parking brake recording little or no effort | 1 |
| Parking brake: efficiency below requirements |3.7.B.7| | 1 |
| Front Headlamp aim not tested |4.1.2 |b|| | 1 |
| Rear Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 1 |
| Front Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Rear Brake pedal is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Front suspension assembly component excessively bent |2.3.1| | 1 |
| Offside Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Brake lever is so short that the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Brake lining|s| contaminated by oil or grease |3.2.A1k| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Brake pedal pivot excessively tight Causing the brake to bind and brake light to stay on. (1.1.1 (a)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Rear Brake locking device insecure |3.2.A1e| | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Horn not working Horn not working |7.7 |a| |ii|| | 1 |
| Fuel tank leaking Fuel leak from fuel tap on tank |6.1.3 |b| |i|| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Rear Axle modified so that axle functionality is affected prop shaft rubbing on swing arm casing. (5.1.1 (c) (ii)) | 1 |
| Hazard warning switch missing |1.4.B.1d| | 1 |
| Nearside Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Offside Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Nearside Rear Wheel spoke missing |4.2.1b| | 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 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Offside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Nearside Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |