| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 18 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 9 |
| Rear reflector on motorcycle missing |1.4.1| | 7 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 6 |
| Steering headbearing has excessive free play |2.2.2| | 6 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 3 |
| Registration plate issues | 3 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 3 |
| Fuel system component leaking |7.2.1a| | 3 |
| Brake hose excessively deteriorated | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 3 |
| Drive chain excessively loose |6.2.1d| | 3 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Brake performance not tested |3.3| | 2 |
| Horn not working |1.7.3a| | 2 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Chain guard fouling another component |6.2.1c| | 2 |
| Rear Drive chain excessively loose |6.2.1d| | 2 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Front Brake caliper|s| insecure |3.2.A1j| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Brake component is fractured |3.1.5| | 1 |
| Nearside Sidecar rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Front Sidecar front position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Rear Sidecar front position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear suspension component excessively corroded. |2.4.A.1a| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Fork yoke insecure top bult |2.2.2 |d| |i|| | 1 |
| Front Brake lever has insufficient reserve travel |1.1.2 |a|| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Fuel system component leaking |6.1.3 |b| |i|| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 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 |
| Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Brake pipe union leaking fluid |3.2.B4| | 1 |
| Position lamp switch faulty |1.1.4a| | 1 |
| Front Brake hose leaking fluid |3.2.B4| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Fuel pipe leaking N/S CONNECTION |7.2.1a| | 1 |
| Front Upper Front suspension has a modification which reduces the strength of a load bearing member or its supporting structure. |2.3.8| | 1 |
| Upper Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Roller brake test indicates a binding brake front |3.3.A1a| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Front Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Brake hose damaged | 1 |
| Offside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Front Brake disc|s| insecure |3.2.A1g| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Nearside Rear Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Offside Fuel hose leaking |7.2.1a| | 1 |
| Offside Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| An item not tested |Manual| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 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 |
| Front Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Centre Rear Drive chain excessively loose |6.2.1d| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Stop lamp does not illuminate immediately a brake applies brake light bulb |1.3.1a| | 1 |
| Horn missing |1.7.1| | 1 |
| Nearside Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Offside Direction indicators not working |1.5.1c| | 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 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Front position lamp insecure |1.1.1c| | 1 |
| Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Fuel tank leaking |7.2.1a| | 1 |
| Front Wheel spoke excessively corroded |4.2.1b| | 1 |
| Rear Wheel spoke excessively corroded |4.2.1b| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Offside Front Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Nearside Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |