| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 20 |
| Rear reflector on motorcycle missing |1.4.1| | 16 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 12 |
| Registration plate issues | 11 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Headlamp aim beam image kick up to the offside |1.6| | 5 |
| Horn not working |1.7.3a| | 4 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Drive chain excessively loose |6.2.1d| | 3 |
| Registration plate lamp issues | 3 |
| 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| | 3 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Horn control defective |1.7.2a| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Offside Front Direction indicators affected by the operation of another lamp flashing when nearside indicator is on |1.5.1c| | 1 |
| Rear Rear reflector missing fitted (4.8.2 (a) (ii)) | 1 |
| Rear Direction indicator obviously incorrectly positioned BOTH (4.4.3 (a)) | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Nearside Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Offside Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Offside Upper Fork yoke cracked |2.1.1b| | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Rear All direction indicators obviously incorrectly positioned too close together (4.4.3 (a)) | 1 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Rear Wheel hub excessively worn (5.2.1 (b) (i)) | 1 |
| Nearside Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Headlamp insecure |4.1.1 |c|| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Rear Fuel tank leaking |7.2.1a| | 1 |
| Rear Brake master cylinder has a seized master cylinder pivot. |3.2.B5| | 1 |
| Rear Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Rear position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Front Brake lever mounting cracked |3.1.2c| | 1 |
| Front Brake lever mounting insecure |3.1.2a| | 1 |
| Rear Brake disc|s| securing bolt|s| missing |3.2.A1g| | 1 |
| Front suspension assembly component missing |2.3.1| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Centre Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Rear Brake lagging in operation (1.2.1 (d)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Nearside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Offside Front Brake hose stretched by suspension movement |3.2.B3b| | 1 |
| Brake hose damaged | 1 |
| Offside Front Brake hose fouling |3.2.B3b| | 1 |
| Nearside Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Offside Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Offside Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Offside Rear Direction indicator incorrect colour |4.4.3 |a|| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Nearside Front Direction indicators affected by the operation of another lamp flashing when offside indicator is on |1.5.1c| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Fuel hose leaking (6.1.3 (b) (i)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |