| Most common failures | No# failures |
|---|
| Registration plate issues | 48 |
| Rear reflector on motorcycle missing |1.4.1| | 39 |
| Headlamp aim out of alignment | 31 |
| Horn not working |1.7.3a| | 19 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 18 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 17 |
| Front wheel bearings have excessive free play |2.3.5b| | 15 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Front wheel bearings are excessively rough |2.3.5b| | 11 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Headlamp aim beam image kick up to the offside |1.6| | 10 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Drive chain excessively loose |6.2.1d| | 8 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 8 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 7 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Drive chain worn to excess |6.2.1e| | 5 |
| Rear Wheel spoke excessively loose |4.2.1b| | 5 |
| Front Horn not working |1.7.3a| | 5 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 4 |
| Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Rear reflector missing |4.8.2 |a| |ii|| | 3 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 3 |
| Rear Brake caliper|s| insecure |3.2.A1j| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Rear position lamp incorrect colour |1.1.2b| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Wheel spoke excessively loose |4.2.1b| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 2 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Front wheel spindle securing nut|s| loose |2.3.5a| | 2 |
| Fuel cap sealing washer missing |7.2.2c| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Drive chain excessively tight, so that it is likely to fail |6.1.7 |k| |ii|| | 2 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Horn missing |1.7.1| | 2 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Rear Lower Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Wheel spoke excessively loose (5.2.2 (d)) | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear Brake pedal attachment screws missing. |3.1.2b| | 1 |
| Rear Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Nearside Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Nearside Inner Chain guard insecure |6.2.1c| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Central Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Headlamp reflector seriously defective |4.1.1 |b| |ii|| | 1 |
| Headlamp light intensity severely reduced |4.1.4 |a|| | 1 |
| Headlamp insecure bolts not holding headlamp tight enough to stop it pivoting |4.1.1 |c|| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Front Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Fuel system component leaking Carb |7.2.1a| | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Position lamp lens seriously defective less than 50% working (4.2.1 (b)) | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Nearside Front Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Rear Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Centre Lower Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 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 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Offside Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Exhaust silencer insecure |8.1.1 |b| |i|| | 1 |
| Front shock absorber seal failed and leaking oil R/H |2.3.3| | 1 |
| Rear suspension bearing has excessive free play Lower |2.4.A2a|i|| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Nearside Steering lock stop missing |2.1.3| | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Horn not working (1.7.3a) | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Rear Wheel alignment incorrect which adversely affects the steering |2.4 |a|| | 1 |
| Front Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Rear Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| All direction indicators adversely affected by the operation of another lamp (4.4.3 (b)) | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Horn not working (7.7 (a)) | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Inner Front Lower Brake pipe excessively damaged |3.2.B2a| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Steering lock stop missing |2.1.3| | 1 |
| Registration plate lamp issues | 1 |
| Front Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Exhaust is leaking and excessively noisey Front pipe |7.1.1b| | 1 |
| Rear Wheel spoke missing |4.2.1b| | 1 |
| Throttle operating incorrectly sticking on right hand lock |6.2.1f| | 1 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Drive chain horseshoe locking device likely to become detached |6.1.7 |j| |ii|| | 1 |
| Drive chain excessively loose links seized |6.1.7 |c| |i|| | 1 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Front Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |