| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 44 |
| Steering headbearing has excessive free play |2.2.2| | 29 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 19 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 19 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 19 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 15 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 13 |
| Horn not working |1.7.3a| | 13 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 13 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 10 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 9 |
| Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 8 |
| Rear reflector on motorcycle missing |1.4.1| | 8 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 6 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 6 |
| Direction indicators not working |1.5.1c| | 5 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 5 |
| Registration plate issues | 5 |
| Throttle operating incorrectly |6.2.1f| | 5 |
| Front Steering headbearing has excessive free play |2.2.2| | 5 |
| Riders seat insecure |6.2.1a| | 4 |
| Rear Direction indicators not working |1.5.1c| | 4 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Front suspension has inadequate damping effect. |2.3.6c| | 4 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 4 |
| Headlamp insecure |1.2.3b| | 4 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Front Direction indicators not working |1.5.1c| | 3 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 3 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 3 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Front Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Headlamp switch faulty |1.2.4| | 2 |
| Offside Steering lock stop missing |2.1.3| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Rear Exhaust excessively deteriorated |7.1.1a| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Rear reflector on motorcycle obscured |1.4.1| | 2 |
| Position lamp switch insecure |1.1.4b| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Offside Rear Direction indicator damaged and function impaired |1.5.3a| | 2 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Front wheel has a loose wheel nut|s| |4.2.3a| | 2 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Offside Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Offside Steering lock stop ineffective |2.1.3| | 2 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front Brake component is fractured |3.1.5| | 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 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Centre Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Front Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Front Brake back plate|s| insecure |3.2.A1j| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Headlamp dipped beam flickers when tapped lightly by hand |1.2.2c| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Front Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Stop lamp insecure |1.3.3b| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Front suspension has excessive stiffness in the suspension movement. Suspension bushes - lubricated |2.3.6b| | 1 |
| Offside Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Outer Front Horn is not a constant note |1.7.3c| | 1 |
| Centre Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Centre Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Centre Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Steering linkage has excessive free play |2.2.2| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Steering lock stop ineffective |2.1.3| | 1 |
| Front Front suspension assembly has an insecure fork brace |2.3.4d| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Offside Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Brake hose excessively deteriorated | 1 |
| Headlamp insecure headlight is missing a mounting bolt. |1.2.3b| | 1 |
| Offside Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Nearside Lower Exhaust excessively deteriorated |7.1.1a| | 1 |
| Front suspension spring worn and seriously weakened |2.3.2b| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Front wheel spindle loose |2.3.5a| | 1 |
| Rear Exhaust mounting missing |7.1.1c| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Brake component insecure Retaining clip missing (1.1.21 (c)) | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Headlamp aim projected beam image obviously incorrect NO PATTERN (4.1.2 (c)) | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Stop lamp not working Front brake control |4.3.1 |a| |ii|| | 1 |
| Stop lamp does not illuminate immediately a brake applies front brake lever |1.3.1a| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Brake lever cracked |3.1.2c| | 1 |
| Front Headlamp not working on main beam bulb holder in upside down, re fit and adjusted to suit (4.1.1 (a) (ii)) | 1 |
| Nearside Front Brake lever has abnormal movement of levers indicating excessive wear or maladjustment (1.1.15 (f)) | 1 |
| Central Motorcycle structure joining/attachment plate or fastening insecure nearside side stand insecure (6.1.1 (b) (i)) | 1 |
| Upper Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Upper Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Direction indicator missing |1.5.1a| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |