| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 22 |
| Headlamp aim out of alignment | 20 |
| Registration plate issues | 11 |
| Horn not working |1.7.3a| | 8 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 7 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 5 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Drive chain excessively loose |6.2.1d| | 4 |
| Rear Footrest missing |6.2.1a| | 3 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Offside Front Footrest insecure |6.2.1a| | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Fuel pipe leaking |7.2.1a| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Brake disc|s| cracked |3.2.A1g| | 2 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Rear Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Floor brake test Neither brake control achieves an efficiency of 25% |3.3.C1b| | 1 |
| Offside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Offside Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Nearside Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Offside Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| All direction indicators missing |4.4.1 |a| |ii|| | 1 |
| Front shock absorber seal failed and leaking oil both |2.3.3| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride rear sprocket loose |6.2.1h| | 1 |
| Front Direction indicator missing |1.5.1a| | 1 |
| Rear Direction indicator missing |1.5.1a| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Offside Rear Indicator switch insecure |1.5.4| | 1 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Indicator switch defective |1.5.4| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Stop lamp does not illuminate immediately a brake applies rear switch |1.3.1a| | 1 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Rear Upper Seat insecure |6.2.1a| | 1 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Brake pedal is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Throttle operating incorrectly |6.2.7 |a| |i|| | 1 |
| Offside Front Brake disc|s| insecure |3.2.A1g| | 1 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front Brake caliper|s| insecure |3.2.A1j| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Central Front Inner Horn not working replaced at time of test (7.7 (a) (ii)) | 1 |
| Drive chain worn to excess replaced with new sprockets, at time of test (6.1.7 (c) (i)) | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Front Upper Horn not working |1.7.3a| | 1 |
| Nearside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Fuel tank leaking (6.1.3 (b) (i)) | 1 |
| Nearside Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Rear Stop lamp missing |1.3.3a| | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Headlamp main beam flickers when tapped lightly by hand |1.2.2c| | 1 |
| Rear Brake pedal attachment screws loose |3.1.2b| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Upper Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Steering control handlebar movement restricted by cables caught on a projection |2.1.2c| | 1 |
| Drive chain excessively tight, so that it is likely to fail Unable to properly check sprockets (6.1.7 (k) (ii)) | 1 |
| Rear Shock absorber has negligible damping effect No movement (5.3.2 (b)) | 1 |
| Offside Handlebar retaining device loose (2.2.1 (b) (i)) | 1 |
| Rear Brake component insecure |1.1.21 |c|| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Offside Front Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Front Wheel damaged significantly reducing the original strength |4.2.1a| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear wheel spindle loose |2.4.A.2b| | 1 |