| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 32 |
| Rear reflector on motorcycle missing |1.4.1| | 17 |
| Horn not working |1.7.3a| | 10 |
| Registration plate issues | 9 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 8 |
| Steering headbearing has excessive free play |2.2.2| | 7 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 5 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Lower Rear suspension bearing has excessive free play |2.4.A2a|i|| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Handlebar deformed |2.1.1b| | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Front Steering headbearing has excessive free play |2.2.2| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 3 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Rear Wheel spoke excessively loose |4.2.1b| | 3 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Centre Front Horn not working |1.7.3a| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| All direction indicators missing (4.4.1 (a) (ii)) | 2 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| 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| | 2 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| An item not tested |Manual| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 2 |
| 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 |
| Direction indicator not working |1.5.1c| | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Front Stop lamp not working Front brake light not working (4.3.1 (a) (ii)) | 1 |
| Front Brake cylinder inadequately mounted Master cylinder loose (1.1.16 (c) (i)) | 1 |
| Front Clutch lever positioned so it cannot be readily operated Lever mount loose (6.2.7 (b)) | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 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 |
| Centre Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Centre Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Centre Front Front wheel insecure |4.2.3b| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Drive chain excessively loose |6.2.1d| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Inner Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Outer Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Outer Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Outer Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Outer Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Inner Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Front Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Front Exhaust mounting missing |7.1.1c| | 1 |
| Front Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Front Brake hose fouling |3.2.B3b| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Rear Wheel damaged significantly reducing the original strength |4.2.1a| | 1 |
| Rear Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Rear Front mudguard insecure |2.3.7| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front Brake lever is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Rear Rear wheel insecure |4.2.3b| | 1 |
| Rear wheel insecure |4.2.3b| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Position lamp switch insecure (4.2.2 (b)) | 1 |
| Rear Footrest missing (6.2.12 (a)) | 1 |
| Rear Suspension arm attachment bracket/mounting corroded and seriously weakened Rear swinging arm stiffeners missing (5.3.3 (b) (i)) | 1 |
| Rear Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Handlebar mounting clamp bolt missing |2.1.1a| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Rear Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Central Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Rear Fuel system component leaking |7.2.1a| | 1 |
| Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Throttle operating incorrectly |6.2.1f| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Footrest insecure Both Securing device is missing (6.2.12 (a)) | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Front Brake grabbing severely |1.2.1 |c|| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Front Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Lower Rear suspension component loose |2.4.A.1a| | 1 |
| Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 1 |
| Offside Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Front suspension assembly component missing |2.3.1| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Nearside Front Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Headlamp not working on dipped beam refitted plug on bulb |4.1.1 |a| |ii|| | 1 |
| Headlamp not working on main beam refitted plug on bulb |4.1.1 |a| |ii|| | 1 |
| Rear Lower Suspension component pin or bush excessively worn re-greased to remove play |5.3.4 |a| |i|| | 1 |
| Fuel system component insecure fuel pipe |7.2.1b| | 1 |
| Outer Rear Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Inner Front Upper Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Outer Front Lower Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Front Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Lower Suspension arm ball joint excessively worn all (5.3.4 (a) (i)) | 1 |
| Front Wheel spoke excessively loose |5.2.2 |d|| | 1 |
| Rear Lower Suspension rod ball joint excessively worn |5.3.4 |a| |i|| | 1 |
| Drive chain excessively tight, so that it is likely to fail |6.1.7 |k| |ii|| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Nearside Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Nearside Rear 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 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |