| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 28 |
| Throttle operating incorrectly |6.2.1f| | 10 |
| Drive chain excessively loose |6.2.1d| | 9 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 8 |
| Rear Wheel corroded significantly reducing the original strength |4.2.1a| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| 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 |
| Front Wheel corroded significantly reducing the original strength |4.2.1a| | 4 |
| Registration plate issues | 4 |
| Rear reflector on motorcycle missing |1.4.1| | 4 |
| Nearside Rear Direction indicator not working |1.5.1c| | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| An item not tested |Manual| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Horn not working |1.7.3a| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 2 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Rear Rear position lamp insecure |1.1.1c| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Centre Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Nearside Front Upper Horn control defective |1.7.2a| | 1 |
| Centre Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Offside Exhaust excessively deteriorated |7.1.1a| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Offside Front Throttle operating incorrectly |6.2.1f| | 1 |
| Offside Front Upper Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Centre Front Drive chain worn to excess |6.2.1e| | 1 |
| Rear Drive chain fouling another component |6.2.1d| | 1 |
| Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Rear Brake locking device insecure |3.2.A1e| | 1 |
| Front Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Brake disc|s| cracked |3.2.A1g| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Headlamp incorrect colour |1.2.1| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Front wheel spindle loose |2.3.5a| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Front Brake indicates excessive fluctuation of brake effort tested on road to confirm |1.2.1 |e|| | 1 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Nearside Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Offside Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Headlamp aim beam image too far to the right |1.6.4| | 1 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Centre Rear Exhaust excessively deteriorated |7.1.1a| | 1 |
| Nearside Front Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Dipswitch does not operate immediately when selected on dipped beam |4.1.3 |b|| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Rear Wheel spoke missing |4.2.1b| | 1 |
| Wheel spoke excessively loose |4.2.1b| | 1 |
| Rear Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Stop lamp missing |1.3.3a| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Throttle operating incorrectly |6.2.1f| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Wheel excessively corroded |5.2.2 |c| |i|| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Steering lock stop ineffective |2.1.3| | 1 |
| Nearside Position lamp switch insecure |1.1.4b| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Nearside Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Offside Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Front Front position lamp damaged and function impaired |1.1.1b| | 1 |
| Front Brake component is excessively corroded |3.1.5| | 1 |
| Front Wheel fractured significantly reducing the original strength |4.2.1a| | 1 |
| Rear Wheel fractured significantly reducing the original strength |4.2.1a| | 1 |
| Nearside Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Offside Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Nearside Rear Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Nearside Rear Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Nearside Front Indicator switch insecure |1.5.4| | 1 |
| Offside Front Steering lock stop ineffective |2.1.3| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Upper Suspension component pin or bush excessively worn |5.3.4 |a| |i|| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Suspension component pin or bush excessively worn monoshock link (5.3.4 (a) (i)) | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Front Wheel bearing play so excessive that directional control is impaired (5.1.3 (a) (ii)) | 1 |
| Lower Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Registration plate lamp issues | 1 |
| Stop lamp lens defective such that the emitted light is adversely affected White Light Shown (4.3.1 (b) (ii)) | 1 |
| All position lamps do not illuminate immediately when switched on (1.1.3a) | 1 |
| Horn not working (1.7.3a) | 1 |
| Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 1 |
| Brake performance not tested (1.2.1 (g)) | 1 |
| Rear Shock absorber has negligible damping effect limited travel (5.3.2 (b)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Brake disc in such a condition that it is seriously weakened brake disc rear is bent (1.1.14 (a) (ii)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |