| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 56 |
| Registration plate issues | 39 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 34 |
| Rear reflector on motorcycle missing |1.4.1| | 33 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 21 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 19 |
| Drive chain excessively loose |6.2.1d| | 18 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 17 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 15 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 14 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 13 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 12 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 11 |
| Horn not working |1.7.3a| | 11 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 11 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 10 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 10 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 10 |
| Front wheel bearings have excessive free play |2.3.5b| | 9 |
| Throttle operating incorrectly |6.2.1f| | 9 |
| Rear Brake disc|s| cracked |3.2.A1g| | 9 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 8 |
| Offside Front Brake disc|s| cracked |3.2.A1g| | 8 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Front wheel bearings are excessively rough |2.3.5b| | 8 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 7 |
| Steering headbearing has excessive free play |2.2.2| | 7 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Headlamp aim beam image kick up to the offside |1.6| | 7 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 7 |
| 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| | 7 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Nearside Rear Direction indicator not working |1.5.1c| | 5 |
| Rear reflector missing (4.8.2 (a) (ii)) | 5 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 5 |
| Nearside Front Brake disc|s| cracked |3.2.A1g| | 4 |
| Direction indicators not working |1.5.1c| | 4 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 4 |
| Front Steering headbearing has excessive free play |2.2.2| | 4 |
| Offside Front Footrest insecure |6.2.1a| | 4 |
| Rear Drive chain excessively loose |6.2.1d| | 4 |
| Front position lamp incorrect colour |1.1.2a| | 4 |
| Rear reflector missing |4.8.2 |a| |ii|| | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Offside Steering lock stop ineffective |2.1.3| | 3 |
| Offside Front Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Chain guard insecure |6.2.1c| | 3 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 3 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 3 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 3 |
| Indicator switch insecure |1.5.4| | 3 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 3 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 3 |
| Rear Brake master cylinder fluid level dangerously low |3.2.B1d| | 3 |
| Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 3 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 3 |
| Rear Footrest missing |6.2.1a| | 3 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Direction indicator not working |1.5.1c| | 2 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Nearside Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 2 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Rear Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 2 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Registration plate lamp issues | 2 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Front Brake performance not tested |3.3| | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Offside Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Front position lamp missing |1.1.1a| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Front Brake excessively binding |1.2.1 |f|| | 2 |
| Offside 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 |
| Headlamp incorrect colour |1.2.1| | 2 |
| Offside Front Upper Throttle operating incorrectly |6.2.7 |a| |i|| | 2 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Exhaust has part of the system missing |7.1.1a| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 2 |
| Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Offside Front Brake disc|s| has excessive run out |3.2.A1m| | 2 |