| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 21 |
| Drive chain excessively loose |6.2.1d| | 15 |
| Front wheel bearings have excessive free play |2.3.5b| | 12 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 11 |
| Headlamp aim beam image kick up to the offside |1.6| | 9 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 9 |
| Registration plate issues | 9 |
| Drive chain worn to excess |6.2.1e| | 8 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 6 |
| Horn not working |1.7.3a| | 6 |
| Front wheel bearings are excessively rough |2.3.5b| | 5 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 5 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Front Brake master cylinder fluid level dangerously low |3.2.B1d| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Rear Drive chain excessively loose |6.2.1d| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| 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| | 2 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| An item not tested |Manual| | 1 |
| Rear Brake linkage has abnormal movement due to excessive wear |3.2.A1i| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Front Brake disc|s| securing bolt|s| missing |3.2.A1g| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Fuel system component leaking (6.1.3 (b) (i)) | 1 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts insecure |3.2.B2c| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Upper Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Rear Wheel spindle locking device missing (5.2.1 (d)) | 1 |
| Rear Wheel spindle loose (5.2.1 (c) (i)) | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Brake performance not tested (1.2.1 (g)) | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Fuel tank insecure (6.1.3 (a) (i)) | 1 |
| Front Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Nearside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Footrest missing both |6.2.12 |a|| | 1 |
| Direction indicators not working all missing |1.5.1c| | 1 |
| Rear suspension component loose swing arm pivot bolt loose |2.4.A.1a| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Rear suspension component seized |2.4A2a|ii|| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing Notchy with weight on and off front wheel |2.2.1a| | 1 |
| Brake pedal anti-slip provision missing |1.1.2 |c|| | 1 |
| Front Front position lamp damaged and function impaired |1.1.1b| | 1 |
| Offside Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Steering headbearing has excessive wear or free play with wheel raised (2.2.2 (f) (i)) | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Nearside Front Front suspension fouling which affects the movement of the front suspension. |2.3.6a| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Brake lever attachment screws missing |3.1.2b| | 1 |
| Front wheel spindle securing nut|s| loose |2.3.5a| | 1 |
| Nearside Position lamp switch insecure |1.1.4b| | 1 |
| Offside Position lamp switch insecure |1.1.4b| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Brake pedal anti-slip provision missing Rear brake pedal (1.1.2 (c)) | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| All direction indicators incorrect colour (4.4.3 (a)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Headlamp reflector seriously defective |4.1.1 |b| |ii|| | 1 |
| Direction indicator not working O/S REAR |4.4.1 |a| |ii|| | 1 |
| Front Brake lagging in operation (1.2.1 (d)) | 1 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Horn is not a constant note |1.7.3c| | 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 |
| Fuel hose leaking |7.2.1a| | 1 |
| Nearside Front Footrest missing |6.2.1a| | 1 |
| Offside Front Footrest missing |6.2.1a| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Brake component insecure (1.1.21 (c)) | 1 |
| Brake rod insecure (1.1.15 (c)) | 1 |
| Position lamp not working (4.2.1 (a)) | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Headlamp aim beam image kick up to the offside beam aim masked |1.6| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Centre Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride spindle |6.2.1h| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Chain guard insecure |6.2.1c| | 1 |