| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 86 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 32 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 28 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 20 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 18 |
| Steering headbearing has excessive free play |2.2.2| | 16 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 16 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Registration plate issues | 12 |
| Horn not working |1.7.3a| | 11 |
| Fuel cap sealing washer missing |7.2.2c| | 11 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 8 |
| Riders seat insecure |6.2.1a| | 8 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 7 |
| Rear reflector on motorcycle missing |1.4.1| | 7 |
| Exhaust excessively deteriorated |7.1.1a| | 6 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 6 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 5 |
| Nearside Rear Direction indicator not working |1.5.1c| | 5 |
| Front wheel bearings are excessively rough |2.3.5b| | 5 |
| Brake lever has inadequate reserve travel |3.1.3b| | 5 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 5 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 5 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 4 |
| Nearside Front Direction indicator not working |1.5.1c| | 4 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Nearside Rear Direction indicators not working |1.5.1c| | 3 |
| Horn not working (7.7 (a) (ii)) | 3 |
| Rear Brake lever has insufficient reserve travel |1.1.2 |a|| | 3 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Stop lamp remains on when the brakes are released | 3 |
| Rear Brake lever has insufficient reserve travel (1.1.2 (a)) | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 2 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 2 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Stop lamp affected by the operation of the horn |1.3.2| | 2 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Front Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 2 |
| Rear position lamp damaged and function impaired |1.1.1b| | 2 |
| Direction indicator not working |1.5.1c| | 2 |
| Offside Steering lock stop ineffective |2.1.3| | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Headlamp light intensity severely reduced (4.1.4 (a)) | 2 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 2 |
| Brake hose damaged | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Centre Rear Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Nearside Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 2 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Stop lamp not working with front brake (4.3.1 (a) (ii)) | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on (1.1.3a) | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Exhaust has a major leak of exhaust gases very corroded with big chunks missing |6.1.2 |a|| | 1 |
| Stop lamp does not illuminate immediately a brake applies front brake |1.3.1a| | 1 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Nearside Rear Rear suspension component loose |2.4.A.1a| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Rear Brake cable excessively corroded |3.2.A1b| | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Handlebar mounting insecure (2.2.1 (a) (i)) | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Nearside Front Lower Suspension arm pin or bush excessively worn |5.3.4 |a| |i|| | 1 |
| Offside Front Lower Suspension arm pin or bush excessively worn |5.3.4 |a| |i|| | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Offside 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 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Front Brake disc contaminated (1.1.14 (b)) | 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 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Front Brake fluid reservoir fluid not visible (1.1.10 (d) (iii)) | 1 |
| Stop lamp not working from front brake control. (4.3.1 (a) (ii)) | 1 |
| Exhaust system insecure |6.1.2 |a|| | 1 |
| Nearside Upper Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Lower Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Offside Upper Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Offside Lower Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Nearside Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Front Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Stop lamp not working Not working from front brake. (4.3.1 (a) (ii)) | 1 |
| Front Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 1 |
| Fuel cap ineffective rubber seal missing (6.1.3 (b) (i)) | 1 |
| Nearside Front Suspension rod attachment bracket/mounting insecure (5.3.3 (a) (i)) | 1 |
| Nearside Front Direction indicator not working (1.5.1c) | 1 |
| Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Exhaust silencer likely to become detached Single bolt bracket For silencer broken (8.1.1 (b) (ii)) | 1 |
| Registration plate lamp issues | 1 |
| All direction indicators adversely affected by the operation of another lamp |4.4.3 |b|| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Offside Front suspension assembly component excessively bent |2.3.1| | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Offside Front Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Steering control handlebar movement restricted by cables caught on a projection |2.1.2c| | 1 |
| Rear Stop lamp not working When using front brake. |4.3.1 |a| |ii|| | 1 |
| Central Rear Riders seat insecure |6.2.5 |a| |ii|| | 1 |
| Rear wheel insecure |4.2.3b| | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Offside Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Rear Rear suspension component loose |2.4.A.1a| | 1 |
| Nearside Brake lever has inadequate reserve travel (3.1.3b) | 1 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking (6.1.1c) | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies STOP LAMP DOES NOT ILLUMINATE WHEN FRONT BRAKE IS APPLIED |1.3.1a| | 1 |
| Rear Exhaust excessively deteriorated |7.1.1a| | 1 |
| Stop lamp does not illuminate immediately a brake applies STOP LAMP DOES NOT ILLUMINATE WHEN FRONT BRAKE BRAKE LEVER IS OPERATED |1.3.1a| | 1 |
| Nearside Front Upper Horn not working |1.7.3a| | 1 |
| Centre Rear Lower Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Nearside Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front Upper Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Front Lower Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Front Headlamp aim not tested (4.1.2 (b)) | 1 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Offside Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Roller brake test brake efficiency less than 27.5% overall (1.2.2 (a) (ii)) | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Offside Front Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Fuel cap ineffective Seal missing (6.1.3 (b) (i)) | 1 |
| Rear Lower Exhaust system insecure Bolt missing (6.1.2 (a)) | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Front Horn sound not in accordance with requirements needs new battery |7.7 |c|| | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Fuel cap ineffective |6.1.3 |b| |i|| | 1 |
| Offside Rear Footrest missing |6.2.12 |a|| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Front Brake hose excessively damaged (1.1.12 (b) (ii)) | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Nearside All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Offside All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Rear Brake lever has abnormal movement of levers indicating excessive wear or maladjustment |1.1.15 |f|| | 1 |
| Front Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 1 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Headlamp aim beam image kick up to the offside (1.6) | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Rear Suspension component modified so the suspension is likely to fail other components mud guard failing rear wheel (5.3.3 (c) (ii)) | 1 |
| Horn sound not in accordance with requirements not loud enough (7.7 (c)) | 1 |
| Headlamp aim not tested no readable pattern-wired wrong? (4.1.2 (b)) | 1 |
| Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition hole in downpipe (8.1.1 (a)) | 1 |
| Rear Brake lever not releasing correctly and functionality of brakes affected cable needs lube (1.1.2 (b) (ii)) | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Rear Wheel hub worn to the extent that wheel security is adversely affected split pin missing (5.2.1 (b) (ii)) | 1 |
| Nearside Stop lamp does not illuminate immediately a brake applies Switch |1.3.1a| | 1 |
| Front suspension assembly excessive wear or free play in a front suspension component Lower shock bushes both sides |2.3.4| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Rear reflector on motorcycle obscured |1.4.2b| | 1 |
| Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |