| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 28 |
| Steering headbearing has excessive free play |2.2.2| | 19 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Rear reflector on motorcycle missing |1.4.1| | 8 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 7 |
| Front suspension has inadequate damping effect. |2.3.6c| | 6 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 5 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 5 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Registration plate issues | 5 |
| Direction indicators not working |1.5.1c| | 5 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| An item not tested |Manual| | 4 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 4 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Horn not working |1.7.3a| | 3 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 3 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 3 |
| Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Nearside Steering lock stop ineffective |2.1.3| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Rear Brake cable has a significantly damaged outer casing. |3.2.A1b| | 2 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear reflector on motorcycle obscured |1.4.2b| | 1 |
| Nearside Indicator switch insecure |1.5.4| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Nearside Position lamp switch insecure |1.1.4b| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| All position lamps adversely affected by the operation of the horn |1.1.3b| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Brake lever mounting insecure |3.1.2a| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Rear Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Front Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Front Brake component damaged and seriously reduced in strength |3.2.A1| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 1 |
| Brake linkage excessively corroded |3.2.A1c| | 1 |
| Offside Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Rear Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Nearside Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Offside Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Brake lever cannot be applied smoothly excessive free play. back brake |3.1.3d| | 1 |
| Nearside Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Rear Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Fork yoke deformed |2.1.1b| | 1 |
| Front wheel spindle loose |2.3.5a| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Nearside Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Nearside Rear Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Offside Rear Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Stop lamp likely to become detached (4.3.1 (c) (ii)) | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Direction indicators affected by the operation of another lamp problem caused by battery failure. |1.5.1c| | 1 |
| Stop lamp adversely affected by the operation of another lamp |4.3.3 |b|| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Brake component is excessively corroded |3.1.5| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Front suspension has excessive corrosion which reduces the strength of a load bearing member or its supporting structure. Fork centre clamp |2.3.8| | 1 |
| Front Headlamp main beam flickers when tapped lightly by hand |1.2.2c| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Headlamp damaged and function impaired |1.2.3a| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Exhaust excessively deteriorated |7.1.1a| | 1 |
| Fuel pipe union leaking |7.2.1a| | 1 |
| Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Brake component is excessively corroded |3.1.5| | 1 |
| 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)) | 1 |
| Nearside Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Nearside Rear Lower Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Outer Front Lower Direction indicator not working |1.5.1c| | 1 |
| Inner Rear Lower Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Offside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front Shock absorber has negligible damping effect excess stiff (5.3.2 (b)) | 1 |
| Steering operation fouling on the fuel tank or bodywork on full lock steering stops ineffective (2.1.4 (b)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Front Front suspension assembly component excessively corroded. |2.3.1| | 1 |
| Nearside Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Offside Front Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Centre Front Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Rear wheel insecure |4.2.3b| | 1 |
| Front Headlamp switch insecure |1.2.4| | 1 |
| Nearside Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Offside Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Rear suspension component seized |2.4A2a|ii|| | 1 |
| Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Nearside Rear Stop lamp does not illuminate immediately a brake applies rear brake |1.3.1a| | 1 |