| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 68 |
| Registration plate issues | 59 |
| Headlamp aim out of alignment | 43 |
| Horn not working |1.7.3a| | 33 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 20 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 17 |
| Front wheel bearings have excessive free play |2.3.5b| | 16 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 13 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 12 |
| Headlamp aim beam image kick up to the offside |1.6| | 9 |
| Rear reflector missing (4.8.2 (a) (ii)) | 8 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 8 |
| Rear reflector missing |4.8.2 |a| |ii|| | 7 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 7 |
| Horn not working |7.7 |a| |ii|| | 5 |
| Rear Wheel spoke excessively loose |4.2.1b| | 5 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Drive chain excessively loose |6.2.1d| | 5 |
| Front wheel bearings are excessively rough |2.3.5b| | 5 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Horn missing |1.7.1| | 3 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 3 |
| Horn not working (7.7 (a)) | 3 |
| Horn not working (7.7 (a) (ii)) | 3 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 3 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 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 |
| Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 2 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Nearside Rear Direction indicator missing |1.5.1a| | 2 |
| Offside Rear Direction indicator missing |1.5.1a| | 2 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Front Wheel spoke excessively loose |4.2.1b| | 2 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Rear Brake disc|s| is excessively distorted |3.2.A1m| | 2 |
| Rear Brake pedal insecure |3.1.2a| | 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 |
| Rear reflector on motorcycle missing (1.4.1) | 2 |
| Rear wheel bearings have excessive free play (2.4.A.2c) | 2 |
| Front Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Front brake disc in such a condition that it is seriously weakened | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Front Wheel damaged or distorted to the extent that control of the motorcycle is likely to be adversely affected |5.2.2 |c| |ii|| | 1 |
| Exhaust has a major leak of exhaust gases front (6.1.2 (a)) | 1 |
| Rear Brake master cylinder leaking (1.1.10 (b) (ii)) | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Registration plate lamp issues | 1 |
| Rear Brake cylinder operating mechanism has excessive travel (1.1.16 (e) (i)) | 1 |
| Rear Brake performance not tested (1.2.1 (g)) | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Sidecar rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Offside Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Front Wheel fractured significantly reducing the original strength |4.2.1a| | 1 |
| Rear Direction indicator missing |1.5.1a| | 1 |
| Front Direction indicator missing |1.5.1a| | 1 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Wheel bearing rough when rotated front wheel bearing is rough on rotation |5.1.3 |b| |i|| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Rear Rear suspension bearing excessively deteriorated |2.4A.2a|i|| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Fuel cap sealing washer missing |7.2.2c| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Centre Rear Lower Wheel spoke missing |4.2.1b| | 1 |
| Centre Front Upper Horn missing |1.7.1| | 1 |
| Centre Rear Upper Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Nearside Front suspension assembly component loose |2.3.1| | 1 |
| Chain guard fouling another component |6.2.1c| | 1 |
| Rear Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Front Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front Brake fluid contaminated |1.8 |a|| | 1 |
| Rear Brake fluid contaminated |1.8 |a|| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Wheel damaged significantly reducing the original strength |4.2.1a| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front wheel spindle loose |2.3.3a| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Rear Built up wheel has a loose bolt/s |4.2.1c| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Nearside Steering lock stop missing |2.1.3| | 1 |
| Centre Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Rear Rear wheel spindle loose |2.4.A.2b| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Front Wheel excessively distorted (5.2.2 (c) (i)) | 1 |
| Fuel system component leaking carburettor |7.2.1a| | 1 |
| Nearside Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Offside Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Suspension arm pin or bush excessively worn swinging arm |5.3.4 |a| |i|| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride bolt missing from rear sprocket |6.2.1h| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Suspension arm pin or bush excessively worn Swinging arm bearing. (5.3.4 (a) (i)) | 1 |
| Front Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Drive chain sprocket so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Rear Brake component has an inadequate repair |3.1.5| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Direction indicator missing |1.5.1a| | 1 |
| Rear Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Brake pedal is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Drive chain fouling another component Lower forward chain guide fowling |6.2.1d| | 1 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Offside Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Brake pedal is inoperative |3.1.3c| | 1 |
| Front Stop lamp missing |1.3.3a| | 1 |
| Rear Stop lamp missing |1.3.3a| | 1 |
| Rear Headlamp missing |1.2.3a| | 1 |
| Front suspension fouling which affects the movement of the front suspension. |2.3.6a| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Front Brake caliper|s| insecure |3.2.A1j| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Offside Front Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Rear Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Front Upper Horn not working |1.7.3a| | 1 |
| Centre Front Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Centre Rear Lower Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Stop lamp does not illuminate immediately a brake applies Off front brake |1.3.1a| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 1 |
| Horn control not readily accesible. |1.7.2a| | 1 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Rear Wheel corroded significantly reducing the original strength rim damaged due to loose spokes needs replacing |4.2.1a| | 1 |
| Rear Wheel spoke excessively loose several-needs new rim |4.2.1b| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride split link clip worn away |6.2.1h| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Lower Rear suspension bush has excessive free play (2.4.A2a(i)) | 1 |
| Rear position lamp incorrect colour (1.1.2b) | 1 |
| Steering headbearing has excessive free play (2.2.2) | 1 |
| Front Drive chain sprocket worn to excess (6.2.1e) | 1 |
| Horn is not continous or uniform (1.7.3c) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. (3.3.A2b) | 1 |
| Horn not working (1.7.3a) | 1 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Nearside Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |