| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 189 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 142 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 68 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 68 |
| Rear reflector on motorcycle missing |1.4.1| | 56 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 51 |
| Registration plate issues | 51 |
| Horn not working |1.7.3a| | 48 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 44 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 42 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 40 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 38 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 37 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 32 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 28 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 26 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 23 |
| Riders seat insecure |6.2.1a| | 23 |
| Stop lamp remains on when the brake is released |1.3.1e| | 22 |
| Steering headbearing has excessive free play |2.2.2| | 22 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 22 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 21 |
| Front Brake excessively binding (1.2.1 (f)) | 20 |
| Throttle operating incorrectly |6.2.1f| | 17 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 16 |
| Fuel cap sealing washer missing |7.2.2c| | 16 |
| Stop lamp remains on when the brakes are released | 15 |
| Headlamp aim not tested (4.1.2 (b)) | 14 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 14 |
| Indicator switch defective |1.5.4| | 13 |
| Rear reflector missing (4.8.2 (a) (ii)) | 13 |
| Rear Position lamp not working (4.2.1 (a)) | 12 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 12 |
| Nearside Front Direction indicator not working |1.5.1c| | 12 |
| Headlamp aim not tested |1.6| | 12 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 11 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 10 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 10 |
| Horn not working |7.7 |a| |ii|| | 10 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 10 |
| Direction indicators not working |1.5.1c| | 9 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 9 |
| Rear Brake lever attachment screws loose |3.1.2b| | 9 |
| Front Brake excessively binding |1.2.1 |f|| | 9 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 9 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 8 |
| Front suspension has inadequate damping effect. |2.3.6c| | 8 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 8 |
| Offside Steering lock stop ineffective |2.1.3| | 8 |
| Horn not working (7.7 (a) (ii)) | 8 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 8 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 8 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 7 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 7 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 7 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 7 |
| Stop lamp not working (4.3.1 (a) (ii)) | 7 |
| Offside Front Direction indicator not working |1.5.1c| | 7 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 7 |
| Front wheel bearings have excessive free play |2.3.5b| | 7 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 7 |
| Front wheel bearings are excessively rough |2.3.5b| | 7 |
| Nearside Front Direction indicators not working |1.5.1c| | 6 |
| Registration plate lamp issues | 6 |
| Stop lamp does not emit a steady light |1.3.1b| | 6 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 6 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 6 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 6 |
| Rear Brake lever has insufficient reserve travel (1.1.2 (a)) | 6 |
| Exhaust excessively deteriorated |7.1.1a| | 5 |
| Headlamp insecure |1.2.3b| | 5 |
| Headlamp switch faulty |1.2.4| | 5 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 5 |
| Rear Brake lever insecure |3.1.2a| | 5 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 5 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 5 |
| All direction indicators not working |4.4.1 |a| |ii|| | 5 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 5 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 5 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 5 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 5 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 5 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 5 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| 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)) | 4 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Rear position lamp incorrect colour |1.1.2b| | 4 |
| Riders seat insecure (6.2.5 (a) (ii)) | 4 |
| Nearside Rear Direction indicator not working |1.5.1c| | 4 |
| Offside Front Direction indicators not working |1.5.1c| | 4 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 4 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 4 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 4 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 4 |
| Nearside Direction indicators not working |1.5.1c| | 4 |
| Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 4 |
| Nearside Direction indicator not working |1.5.1c| | 4 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 4 |
| Horn control not functioning. |1.7.2b| | 4 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 4 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 4 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 4 |
| Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 4 |
| Offside Direction indicator not working |1.5.1c| | 4 |
| Rear Position lamp not working |4.2.1 |a|| | 4 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 4 |
| Front Position lamp not working (4.2.1 (a)) | 4 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |