| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 14 |
| Rear reflector on motorcycle missing |1.4.1| | 10 |
| Drive chain excessively loose |6.2.1d| | 7 |
| Rear reflector on motorcycle obscured |1.4.1| | 5 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 3 |
| Nearside Handlebar deformed |2.1.1b| | 3 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Front mudguard insecure |2.3.7| | 2 |
| Registration plate issues | 2 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Nearside Front Footrest insecure |6.2.1a| | 2 |
| Offside Handlebar deformed |2.1.1b| | 2 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Nearside Front Direction indicator insecure |1.5.3b| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Offside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Offside Handlebar cracked |2.1.1b| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp switch intermittent
|1.2.2b|i|| | 1 |
| Nearside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Fuel cap mounting flange/sealing method defective |7.2.2c| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Drive chain excessively loose |6.2.1d| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Nearside Motorcycle structure joining/attachment plate or fastening insecure (6.1.1 (b) (i)) | 1 |
| Handlebar excessively deformed (2.2.1 (c) (i)) | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Nearside Footrest missing |6.2.1a| | 1 |
| Nearside Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Nearside Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Offside Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Nearside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Offside Front Motorcycle structure adversely modified |6.1.1b| | 1 |
| Offside Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Horn not working |1.7.3a| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Offside Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 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 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Rear Brake master cylinder defective but brake still operating Reserve cylinder empty (1.1.10 (b) (i)) | 1 |
| Rear Brake fluid reservoir insecurely mounted |3.2.B1a| | 1 |