| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 95 |
| Rear reflector on motorcycle missing |1.4.1| | 45 |
| Registration plate issues | 26 |
| Rear reflector missing (4.8.2 (a) (ii)) | 23 |
| Registration plate lamp issues | 22 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 15 |
| Front Brake excessively binding (1.2.1 (f)) | 13 |
| Horn not working |1.7.3a| | 11 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 11 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 11 |
| Drive chain excessively loose |6.2.1d| | 10 |
| Offside Front Footrest insecure |6.2.1a| | 10 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 9 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 9 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 9 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 9 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Horn not working (7.7 (a)) | 7 |
| Stop lamp remains on when the brakes are released | 7 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 6 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 6 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 6 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 6 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 6 |
| Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition (8.1.1 (a)) | 6 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 6 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 6 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 6 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 5 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| 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| | 5 |
| Stop lamp remains on when the brake is released |1.3.1e| | 5 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 5 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 5 |
| Horn not working (7.7 (a) (ii)) | 5 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 4 |
| Nearside Rear Direction indicators not working |1.5.1c| | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 4 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 4 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 4 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 3 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 3 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 3 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Front Horn not working (7.7 (a)) | 3 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 3 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 3 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 3 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 3 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Offside Front Footrest insecure (6.2.12 (a)) | 2 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected |6.2.7 |a| |ii|| | 2 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 2 |
| Front position lamp incorrect colour |1.1.2a| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 2 |
| Nearside Rear Direction indicator with a multiple light source more than 1/2 not functioning (4.4.1 (a) (ii)) | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Rear Brake disc significantly and obviously worn |1.1.14 |a| |i|| | 2 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Front Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 2 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |
| Front Wheel excessively distorted (5.2.2 (c) (i)) | 2 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Rear Footrest missing (6.2.12 (a)) | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Offside Front Direction indicator likely to become detached (4.4.1 (c) (ii)) | 2 |
| Steering headbearing excessively stiff or notchy Excessive notch (2.2.2 (f) (i)) | 2 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Front Brake fluid reservoir severely damaged |3.2.B1b| | 2 |
| Front Brake fluid reservoir insecurely mounted |3.2.B1a| | 2 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Rear Brake excessively binding |1.2.1 |f|| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Dipswitch does not operate immediately when selected on main beam (4.1.3 (b)) | 2 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 2 |
| Stop lamp emits other than a steady red light |1.3.1b| | 2 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Rear Brake excessively binding (1.2.1 (f)) | 2 |
| Rear Brake pedal not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 2 |
| Steering headbearing in such a condition that steering control is adversely affected |2.2.2 |f| |ii|| | 2 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Rear Direction indicator adversely affected by the operation of another lamp (4.4.3 (b)) | 2 |