| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 37 |
| Steering headbearing has excessive free play |2.2.2| | 24 |
| Registration plate issues | 21 |
| Horn not working |1.7.3a| | 18 |
| Stop lamp remains on when the brakes are released | 17 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 10 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 10 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 10 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 9 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 9 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 9 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 8 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 8 |
| Rear reflector on motorcycle missing |1.4.1| | 8 |
| Stop lamp remains on when the brake is released |1.3.1e| | 8 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 8 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 7 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 7 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 6 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 6 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 5 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 5 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 5 |
| Front Brake excessively binding |1.2.1 |f|| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 4 |
| Rear Brake lever has insufficient reserve travel |1.1.2 |a|| | 4 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 4 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 4 |
| Direction indicators not working |1.5.1c| | 4 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 4 |
| Rear Position lamp not working (4.2.1 (a)) | 4 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 4 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 3 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 3 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 3 |
| Nearside Rear Direction indicators not working |1.5.1c| | 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 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Rear reflector missing |4.8.2 |a| |ii|| | 3 |
| Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Indicator switch defective |1.5.4| | 3 |
| Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Nearside Front Direction indicators not working |1.5.1c| | 3 |
| Riders seat insecure (6.2.5 (a) (ii)) | 3 |
| Horn not working (7.7 (a) (ii)) | 3 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 3 |
| Rear Brake excessively binding (1.2.1 (f)) | 3 |
| 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 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Front Shock absorber has negligible damping effect |5.3.2 |b|| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Nearside Indicator switch insecure |1.5.4| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Rear Brake pipe inadequately supported |3.2.B2b| | 2 |
| Rear Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Offside Front Direction indicator not working |4.4.1 |a| |ii|| | 2 |
| Headlamp switch faulty |1.2.4| | 2 |
| Fuel system component insecure |7.2.1b| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 2 |
| Exhaust has part of the system missing |7.1.1a| | 2 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 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 |
| Exhaust system insecure (6.1.2 (a)) | 2 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Front brake disc in such a condition that it is seriously weakened | 2 |
| Front Brake disc(s) excessively worn (3.2.A1l) | 2 |
| Front All position lamps not working (4.2.1 (a)) | 2 |
| Registration plate lamp issues | 2 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |
| Rear Brake lever has insufficient reserve travel (1.1.2 (a)) | 2 |
| Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| All direction indicators not working (4.4.1 (a) (ii)) | 2 |
| Front Position lamp not working (4.2.1 (a)) | 2 |