| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 36 |
| Steering headbearing has excessive free play |2.2.2| | 19 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 16 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 11 |
| Horn not working |1.7.3a| | 11 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 11 |
| Registration plate issues | 10 |
| Riders seat insecure |6.2.1a| | 10 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 10 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Front wheel bearings are excessively rough |2.3.5b| | 9 |
| Fuel cap sealing washer missing |7.2.2c| | 9 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 9 |
| Direction indicators not working |1.5.1c| | 7 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Front wheel bearings have excessive free play |2.3.5b| | 6 |
| Nearside Indicator tell tale not functioning |1.5.2| | 5 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 5 |
| Offside Front Direction indicators not working |1.5.1c| | 4 |
| Headlamp aim not tested |1.6| | 4 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear reflector on motorcycle obscured |1.4.1| | 4 |
| Throttle operating incorrectly |6.2.1f| | 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 |
| Offside Rear Direction indicators not working |1.5.1c| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Exhaust mounting missing |7.1.1c| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Rear reflector on motorcycle missing |1.4.1| | 3 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Front Headlamp insecure |1.2.3b| | 2 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Nearside Steering lock stop missing |2.1.3| | 2 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 2 |
| Indicator switch defective |1.5.4| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Rear Brake cable excessively corroded |3.2.A1b| | 2 |
| Front Brake cylinder severely corroded |3.2.B1b| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Rear Brake performance not tested |3.3| | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Indicator tell tale not functioning both |1.5.2| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Centre Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Handlebar handgrip missing |2.1.1c| | 1 |
| All direction indicators not working battery needs replacing (4.4.1 (a) (ii)) | 1 |
| Offside Rear 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 |
| Front Front suspension assembly component loose |2.3.1| | 1 |
| Front Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Front Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear Brake lever mounting insecure |3.1.2a| | 1 |
| Offside Rear Steering lock stop missing |2.1.3| | 1 |
| Fairing so located that it is likely to impede the steering |2.1.2e| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Steering lock stop ineffective |2.1.3| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Steering operation impeded by a fairing |2.1.4 |e|| | 1 |
| Nearside Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Position lamp switch faulty |1.1.4a| | 1 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Offside Indicator tell tale not functioning |1.5.2| | 1 |
| Nearside Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Steering headbearing excessively stiff or notchy head race bearings excessively stiff (2.2.2 (f) (i)) | 1 |
| Stop lamp does not illuminate immediately a brake applies front switch |1.3.1a| | 1 |
| Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Nearside Rear Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Front Handlebar deformed |2.1.1b| | 1 |
| Nearside Front Indicator switch does not operate the direction indicators on the side selected |1.5.4| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Fuel cap missing |7.2.2a| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Front Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Front Front suspension fouling which affects the movement of the front suspension. |2.3.6a| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Footrest insecure |6.2.1a| | 1 |
| Offside Steering lock stop missing |2.1.3| | 1 |
| Front Front suspension assembly component excessively bent |2.3.1| | 1 |
| Rear Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Nearside Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Brake lever mounting insecure |3.1.2a| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Nearside Front Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Rear Brake linkage excessively corroded |3.2.A1c| | 1 |
| Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Front Fairing so located that it is likely to impede the steering |2.1.2e| | 1 |
| Nearside Front Direction indicator incorrect colour (4.4.3 (a)) | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Rear Indicator switch does not operate the direction indicators on the side selected |1.5.4| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Offside Lower Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Brake disc significantly and obviously worn |1.1.14 |a| |i|| | 1 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| All direction indicators adversely affected by the operation of another lamp (4.4.3 (b)) | 1 |
| Front Brake lever has restricted free movement |1.1.15 |e|| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Brake component defective due to a deliberate modification which significantly reduces the original strength |3.1.5| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Centre Steering lock stop missing |2.1.3| | 1 |
| Offside Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Nearside Front Brake lever mounting insecure brake lever mounting broken |3.1.2a| | 1 |
| Rear Roller brake test indicates a severely grabbing brake rear brake failing to release when applied |3.3.A1b| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies brake lamp not working when rear brake applied |1.3.1a| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 1 |
| Front Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front mudguard can easily contact any fixed point of the motor bicycle. |2.3.7| | 1 |