| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 10 |
| Headlamp aim out of alignment | 7 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Registration plate issues | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Front Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Front Front mudguard insecure |2.3.7| | 1 |
| Offside Rear Brake pedal attachment screws loose |3.1.2b| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Indicator switch defective |1.5.4| | 1 |
| Nearside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Drive chain excessively loose |6.2.1d| | 1 |
| Rear Brake linkage clevis joint excessively worn |3.2.A1d| | 1 |
| Brake locking device insecure |3.2.A1e| | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Rear Stop lamp remains on when the brake is released Front brake light switch sticking on |1.3.1e| | 1 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Rear position lamp adversely affected by the operation of another lamp both |1.1.3b| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies foot brake |1.3.1a| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Footrest missing both |6.2.1a| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 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 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Brake locking device insecure |3.2.A1e| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Front Brake lever is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Front Indicator switch defective |1.5.4| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Horn not working |1.7.3a| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Offside Front Brake linkage has abnormal movement due to excessive wear |3.2.A1i| | 1 |
| Front Throttle operating incorrectly |6.2.1f| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Offside Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Front Exhaust has a major leak of exhaust gases head /manifold |6.1.2 |a|| | 1 |
| Rear Exhaust has a major leak of exhaust gases silencer |6.1.2 |a|| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Drive chain excessively tight |6.1.7 |k| |i|| | 1 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 1 |
| Nearside Rear Footrest missing |6.2.12 |a|| | 1 |
| Offside Rear Footrest missing |6.2.12 |a|| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Brake lever attachment screws missing |3.1.2b| | 1 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Rear Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 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 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Stop lamp not working rear pedal |4.3.1 |a| |ii|| | 1 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |