| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 25 |
| Rear reflector on motorcycle missing |1.4.1| | 17 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Registration plate issues | 10 |
| Horn not working |1.7.3a| | 6 |
| Nearside Rear Direction indicator not working |1.5.1c| | 6 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Nearside Front Direction indicator not working |1.5.1c| | 5 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Drive chain excessively loose |6.2.1d| | 4 |
| Riders seat insecure |6.2.1a| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Horn control defective |1.7.2a| | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Front Wheel has an excessively eccentric bead rim. |4.2.2| | 2 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Brake hose damaged | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Rear suspension component loose swinging arm (2.4.A.1a) | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Steering lock stop missing |2.1.3| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Steering lock stop missing |2.1.3| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Nearside Front Brake locking device missing |3.2.A1e| | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Centre Front Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Nearside Rear Rear suspension has a fracture of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Centre Rear Drive chain excessively loose |6.2.1d| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| An item not tested |Manual| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Nearside Front Steering lock stop maladjusted |2.1.3| | 1 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Offside Throttle operating incorrectly |6.2.1f| | 1 |
| Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Centre Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Centre Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front Brake hose fouling |3.2.B3b| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Offside Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Front Throttle operating incorrectly |6.2.1f| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Footrest insecure stiff (6.2.12 (a)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Front Fuel system component insecure |7.2.1b| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Brake fluid reservoir cap missing |3.2.B1c| | 1 |
| Brake fluid reservoir insecurely mounted |3.2.B1a| | 1 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Brake pedal insecure |3.1.2a| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 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 |
| Rear Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Brake performance not tested |3.3| | 1 |
| Plate brake test No brake control achieves an efficiency of 30%. |3.3.B2a| | 1 |
| Plate brake test Neither brake control achieves an efficiency of 25% |3.3.B2b| | 1 |
| Front position lamp missing |1.1.1a| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Position lamp switch insecure |1.1.4b| | 1 |