| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 185 |
| Rear reflector on motorcycle missing |1.4.1| | 97 |
| Registration plate issues | 71 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 47 |
| Drive chain excessively loose |6.2.1d| | 45 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 35 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 25 |
| Throttle operating incorrectly |6.2.1f| | 24 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 22 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 20 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 19 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 19 |
| Headlamp aim beam image kick up to the offside |1.6| | 19 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 19 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 19 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 15 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 15 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 15 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 14 |
| 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| | 14 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 13 |
| Drive chain excessively tight |6.2.1d| | 13 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 12 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 12 |
| Front wheel bearings have excessive free play |2.3.5b| | 12 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 11 |
| Nearside Rear Direction indicator not working |1.5.1c| | 11 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 11 |
| Horn not working |1.7.3a| | 11 |
| Steering headbearing has excessive free play |2.2.2| | 10 |
| Offside Rear Direction indicator not working |1.5.1c| | 10 |
| Drive chain worn to excess |6.2.1e| | 10 |
| Offside Front Direction indicator not working |1.5.1c| | 8 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 8 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 8 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 8 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 7 |
| Nearside Front Direction indicator not working |1.5.1c| | 7 |
| Handlebar deformed |2.1.1b| | 7 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 7 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Rear reflector missing |4.8.2 |a| |ii|| | 7 |
| Nearside Rear Direction indicators not working |1.5.1c| | 6 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 6 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 6 |
| Direction indicators not working |1.5.1c| | 6 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 6 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 5 |
| Rear Drive chain excessively loose |6.2.1d| | 5 |
| Offside Rear Direction indicators not working |1.5.1c| | 5 |
| Stop lamp remains on when the brake is released |1.3.1e| | 5 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 5 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 5 |
| Rear reflector missing (4.8.2 (a) (ii)) | 5 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Rear Brake disc|s| cracked |3.2.A1g| | 5 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 4 |
| Indicator tell tale not functioning |1.5.2| | 4 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 4 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Headlamp insecure |1.2.3b| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Direction indicator not working |1.5.1c| | 4 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 4 |
| Offside Rear Direction indicator insecure |1.5.3b| | 4 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 4 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 4 |
| Nearside Footrest insecure |6.2.1a| | 4 |
| Registration plate lamp issues | 4 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 4 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 4 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 3 |
| Nearside Front Footrest insecure |6.2.1a| | 3 |
| Nearside Steering lock stop ineffective |2.1.3| | 3 |
| Offside Steering lock stop ineffective |2.1.3| | 3 |
| Front Plate brake test indicates a binding brake |3.3.B1a| | 3 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Throttle operating incorrectly |6.2.7 |a| |i|| | 3 |
| Nearside Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Offside Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 3 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 3 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 3 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 3 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 3 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 3 |
| Rear All direction indicators obviously incorrectly positioned |4.4.3 |a|| | 3 |
| Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Front position lamp insecure |1.1.1c| | 3 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Rear Direction indicator insecure |1.5.3b| | 3 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Nearside Front Direction indicators not working |1.5.1c| | 3 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 3 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 3 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 3 |
| Rear wheel spindle loose |2.4.A.2b| | 3 |
| Offside Rear Footrest missing |6.2.1a| | 3 |
| Nearside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 3 |