| Most common failures | No# failures |
|---|
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 44 |
| Headlamp aim out of alignment | 35 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 23 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 22 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 22 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 21 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 19 |
| Steering headbearing has excessive free play |2.2.2| | 19 |
| Horn not working |1.7.3a| | 16 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 15 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 14 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 13 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 12 |
| Registration plate issues | 11 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 10 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 9 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 9 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 8 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 8 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 6 |
| Front wheel bearings have excessive free play |2.3.5b| | 6 |
| Front suspension has inadequate damping effect. |2.3.6c| | 6 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 6 |
| Headlamp aim beam image kick up to the offside |1.6| | 6 |
| Stop lamp remains on when the brake is released |1.3.1e| | 6 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 6 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 6 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 5 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 5 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Stop lamp remains on when the brakes are released | 5 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Front wheel bearings are excessively rough |2.3.5b| | 4 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Headlamp insecure |1.2.3b| | 4 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Front Horn not working |1.7.3a| | 3 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 3 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 3 |
| Horn not working (7.7 (a) (ii)) | 3 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Rear Brake lever has insufficient reserve travel (1.1.2 (a)) | 3 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 3 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Rear reflector on motorcycle missing |1.4.1| | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Rear suspension component loose |2.4.A.1a| | 3 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Riders seat insecure |6.2.1a| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 2 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Front Horn control not functioning. |1.7.2b| | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Rear Brake excessively binding (1.2.1 (f)) | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Offside Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 2 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Floor brake test Neither brake control achieves an efficiency of 25% |3.3.C1b| | 2 |
| Rear Brake excessively binding |1.2.1 |f|| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 2 |
| Brake hose damaged | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |
| Rear Rear suspension movement is excessively stiff |2.4.A.3b| | 2 |
| Rear Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 2 |
| Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 2 |
| Front suspension assembly component excessively misaligned |2.3.1| | 2 |