| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 211 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 94 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 76 |
| Registration plate issues | 72 |
| Headlamp aim beam image kick up to the offside |1.6| | 57 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 53 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 46 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 46 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 43 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 41 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 33 |
| Horn not working |1.7.3a| | 32 |
| Drive chain excessively loose |6.2.1d| | 30 |
| Steering headbearing has excessive free play |2.2.2| | 29 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 27 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 26 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 24 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 23 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 22 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 20 |
| Throttle operating incorrectly |6.2.1f| | 19 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 19 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 19 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 18 |
| Front wheel bearings have excessive free play |2.3.5b| | 18 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 18 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 17 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 16 |
| Front Brake excessively binding (1.2.1 (f)) | 16 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 16 |
| Drive chain excessively tight |6.2.1d| | 15 |
| Rear reflector on motorcycle missing |1.4.1| | 14 |
| Drive chain worn to excess |6.2.1e| | 14 |
| Registration plate lamp issues | 13 |
| Front Steering headbearing has excessive free play |2.2.2| | 12 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 12 |
| Exhaust has part of the system missing |7.1.1a| | 11 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 11 |
| Indicator tell tale not operating correctly |1.5.2| | 11 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 11 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 10 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 10 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 10 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 9 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 9 |
| Stop lamp remains on when the brake is released |1.3.1e| | 9 |
| 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| | 9 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 9 |
| Rear Drive chain excessively loose |6.2.1d| | 9 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 9 |
| Offside Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 8 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 8 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 8 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 8 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 8 |
| Nearside Rear Footrest insecure |6.2.1a| | 7 |
| Rear Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 7 |
| Exhaust mounting missing |7.1.1c| | 7 |
| All direction indicators not working (4.4.1 (a) (ii)) | 7 |
| Nearside Front Direction indicators not working |1.5.1c| | 6 |
| Stop lamp remains on when the brakes are released | 6 |
| Indicator switch defective |1.5.4| | 6 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Offside Front Direction indicator not working |1.5.1c| | 6 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 6 |
| Nearside Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Offside Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 6 |
| Nearside Front Direction indicator not working |1.5.1c| | 6 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 6 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 6 |
| Front Position lamp not working (4.2.1 (a)) | 6 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 6 |