| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 80 |
| Horn not working |1.7.3a| | 27 |
| Registration plate issues | 20 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 14 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 9 |
| Front wheel bearings have excessive free play |2.3.5b| | 9 |
| Headlamp switch faulty |1.2.4| | 8 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 7 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 7 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 5 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 5 |
| Front wheel bearings are excessively rough |2.3.5b| | 5 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 4 |
| Horn not working |7.7 |a| |ii|| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Nearside Direction indicator not working |1.5.1c| | 3 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 3 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 3 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 3 |
| Front suspension has inadequate damping effect. |2.3.6c| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Indicator switch defective |1.5.4| | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Direction indicators not working |1.5.1c| | 2 |
| Nearside Front Brake excessively binding (1.2.1 (f)) | 2 |
| Offside Front Brake excessively binding (1.2.1 (f)) | 2 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Horn control not functioning. |1.7.2b| | 2 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 2 |
| Headlamp aim not tested |4.1.2 |b|| | 2 |
| Offside Front Direction indicator not working |4.4.1 |a| |ii|| | 2 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Offside Front Upper Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Offside Rear Inner Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Centre Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Exhaust has part of the system missing |7.1.1a| | 1 |
| Rear Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Central Front Lower Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Front suspension assembly excessive wear or free play in a front suspension component Ball joints |2.3.4| | 1 |
| Rear suspension bearing has excessive free play Pivot bearings |2.4.A2a|i|| | 1 |
| Horn control defective |1.7.2a| | 1 |
| 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 |
| Nearside Front Lower Wheel corroded to the extent that control of the motorcycle is likely to be adversely affected Front spindle flange. Fractured, cracked and corroded away (5.2.2 (c) (ii)) | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Roller brake test brake efficiency less than 27.5% overall (1.2.2 (a) (ii)) | 1 |
| Rear 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 |
| Offside Handlebar deformed |2.1.1b| | 1 |
| Position lamp switch faulty |1.1.4a| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Fuel cap ineffective KEY DOESN`T OPEN FUEL CAP |6.1.3 |b| |i|| | 1 |
| Rear Brake pedal has insufficient reserve travel PEDAL HAS MORE TRAVEL THAN NORMAL
PROBABLY AIR IN THE SYSTEM |1.1.2 |a|| | 1 |
| Throttle operating incorrectly holding revs when let go |6.2.1f| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Headlamp light source and lamp not compatible (4.1.4 (c)) | 1 |
| Brake excessively binding |1.2.1 |f|| | 1 |
| Dipswitch does not operate immediately when selected on main beam |4.1.3 |b|| | 1 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Offside Front Direction indicator obscured |1.5.1a| | 1 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Front Wheel damaged significantly reducing the original strength |4.2.1a| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Front suspension has a fracture of a load bearing member or its supporting structure. End of front wheel spindle fractured/breaking up and pulling through |2.3.8| | 1 |
| Headlamp at least one does not illuminate on main beam main beam does not work when button is operated. could be fault at switch |1.2.2a|ii|| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Direction indicators not working all |1.5.1c| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Front wheel bearings are excessively rough Excessive play |2.3.5b| | 1 |
| Rear Brake hose leaking |1.1.12 |c|| | 1 |
| Offside Front Brake disc significantly and obviously worn |1.1.14 |a| |i|| | 1 |
| Nearside Direction indicators not working not switching off |1.5.1c| | 1 |
| Rear Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Front Wheel excessively distorted (5.2.2 (c) (i)) | 1 |
| Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Rear Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Front Brake component is excessively corroded |3.1.5| | 1 |
| Front Brake lever attachment screws loose |3.1.2b| | 1 |
| Wheel excessively distorted Front rim buckled on nearside due to impact damage |5.2.2 |c| |i|| | 1 |
| Nearside Front Position lamp not working side light (4.2.1 (a)) | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front Outer Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Front Wheel bearing so rough it is likely to overheat or break up |5.1.3 |b| |ii|| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Front Brake locking device missing |3.2.A1e| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected |6.2.7 |a| |ii|| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Front Decelerometer brake test indicates a binding brake |3.3.E1d| | 1 |