| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 30 |
| Steering headbearing has excessive free play |2.2.2| | 22 |
| 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| | 15 |
| Registration plate issues | 14 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 13 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 10 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 10 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Rear reflector on motorcycle missing |1.4.1| | 10 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 8 |
| Front Steering headbearing has excessive free play |2.2.2| | 8 |
| Direction indicators not working |1.5.1c| | 8 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 8 |
| Horn not working |1.7.3a| | 7 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 7 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 6 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 6 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Headlamp aim not tested |1.6| | 5 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 4 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Exhaust excessively deteriorated |7.1.1a| | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 3 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Nearside Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Centre Front Steering headbearing has excessive free play |2.2.2| | 3 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 3 |
| Rear wheel insecure |4.2.3b| | 3 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 2 |
| Front Direction indicator not working |1.5.1c| | 2 |
| Rear Direction indicator not working |1.5.1c| | 2 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Offside Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 2 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Brake lever cannot be released smoothly |3.1.3d| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Upper Steering headbearing has excessive free play |2.2.2| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 2 |
| Offside Steering lock stop ineffective |2.1.3| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Nearside Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Offside Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 2 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Offside Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Rear Brake excessively binding (1.2.1 (f)) | 2 |
| Front Brake component worn and seriously reduced in strength |3.2.A1| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Nearside Rear Lower Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Front Suspension component has excessive wear or free play (5.3.3 (d)) | 1 |
| Front Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Central Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Front Front suspension assembly component excessively bent |2.3.1| | 1 |
| Front Brake component leaking fluid |3.2.B4| | 1 |
| Front Sidecar front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear Sidecar front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Front Front suspension fouling which affects the movement of the front suspension. |2.3.6a| | 1 |
| Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Front Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Lower Steering headbearing has excessive free play |2.2.2| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Front Hydraulic brake control creeps under load. |3.1.4a| | 1 |
| Nearside Front Brake component leaking fluid |3.2.B4| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Front Indicator switch insecure |1.5.4| | 1 |
| Offside Front Headlamp switch insecure |1.2.4| | 1 |
| Rear Brake cable has a significantly damaged outer casing. |3.2.A1b| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Brake lever mounting insecure |3.1.2a| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Throttle operating incorrectly |6.2.1f| | 1 |
| Offside Position lamp switch insecure |1.1.4b| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Front wheel spindle loose |2.3.5a| | 1 |
| Nearside Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Rear Indicator tell tale not functioning |1.5.2| | 1 |
| Front Front position lamp damaged and function impaired |1.1.1b| | 1 |
| Front Brake caliper|s| insecure |3.2.A1j| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Rear Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Front Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Centre Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Centre Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Centre Front Horn not working |1.7.3a| | 1 |
| Rear Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking top box incicure |6.1.1c| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Nearside Front Position lamp switch insecure |1.1.4b| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Offside Front Upper Horn sounds harsh or grating |1.7.3c| | 1 |
| Nearside Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Brake pivot has restricted free movement (1.1.15 (e)) | 1 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Front suspension assembly component loose |2.3.1| | 1 |
| Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Rear Rear suspension component seized |2.4A2a|ii|| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Brake performance not tested FRONT WHEEL INSECURE (DANGEROUS) (1.2.1 (g)) | 1 |
| Nearside Brake lever insecure Brake lever/switch unit insecure (1.1.2 (e) (i)) | 1 |
| Central Front Headlamp insecure (4.1.1 (c)) | 1 |
| Central Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Front Shock absorber has an excessively worn bush Fork bottoms have excessive free play (5.3.2 (c)) | 1 |
| Front Wheel spindle loose Wheel excessively insecure (DANGEROUS) (5.2.1 (c) (i)) | 1 |
| Front Brake caliper insecure (1.1.16 (c) (i)) | 1 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 1 |
| Central Front Headlamp aim not tested Dip beam not working (4.1.2 (b)) | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Front Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 1 |
| Nearside Brake lever insecure REAR BRAKE LEVER/SWITCH GEAR LOOSE (1.1.2 (e) (i)) | 1 |
| Central Front Steering headbearing has excessive wear or free play FREE PLAY (2.2.2 (f) (i)) | 1 |
| Front Shock absorber has an excessively worn bush FORK BOTTOMS HAS EXCESSIVE MOVEMENT (5.3.2 (c)) | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Offside Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Rear Wheel spindle loose (5.2.1 (c) (i)) | 1 |
| Steering linkage has excessive free play |2.2.2| | 1 |
| Nearside Front Brake hose leaking fluid |3.2.B4| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Front Headlamp switch faulty |1.2.4| | 1 |
| Front Front wheel spindle loose |2.3.5a| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 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 |
| Offside Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Centre Front Direction indicators not working |1.5.1c| | 1 |
| Centre Rear Direction indicators not working |1.5.1c| | 1 |
| Offside Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Front Upper Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Centre Rear Upper Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Centre Front Upper Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front Brake component is fractured |3.1.5| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Stop lamp missing |1.3.3a| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Front wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Nearside Front Suspension arm likely to fail (5.3.3 (b) (ii)) | 1 |
| Offside Front Suspension arm likely to fail (5.3.3 (b) (ii)) | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Rear Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 1 |
| Nearside Rear Suspension component pin or bush likely to become detached (5.3.4 (a) (ii)) | 1 |
| Offside Rear Suspension component ball joint likely to become detached (5.3.4 (a) (ii)) | 1 |
| Rear Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Rear position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Nearside Front Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Offside Front Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Steering operation fouling on the fuel tank or bodywork on full lock |2.1.4 |b|| | 1 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Rear Position lamp light intensity significantly reduced covered with an ornament (4.2.3 (a) (ii)) | 1 |
| Nearside Rear Direction indicator incorrect colour showing red and blue (4.4.3 (a)) | 1 |
| Offside Rear Direction indicator incorrect colour showing red and blue (4.4.3 (a)) | 1 |