| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 46 |
| Registration plate issues | 23 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 16 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 14 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 13 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 10 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 10 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 9 |
| Steering headbearing has excessive free play |2.2.2| | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 7 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 6 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Horn not working |1.7.3a| | 5 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 4 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 3 |
| Headlamp switch faulty |1.2.4| | 3 |
| Rear Brake pedal has insufficient reserve travel |1.1.2 |a|| | 3 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Rear Shock absorber insecurely attached |5.3.2 |a| |i|| | 2 |
| Fuel cap sealing washer torn |7.2.2c| | 2 |
| Fuel hose leaking |7.2.1a| | 2 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Headlamp dipped beam flickers when tapped lightly by hand |1.2.2c| | 2 |
| Headlamp dipped beam affected by the operation of the horn |1.2.2c| | 2 |
| Brake lever cannot be applied smoothly |3.1.3d| | 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 Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 2 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Front Front mudguard insecure |2.3.7| | 1 |
| Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Nearside Front Leg shield insecure and likely to impede the steering |2.1.2e| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 1 |
| Nearside Front Lower Front suspension assembly component loose |2.3.1| | 1 |
| Fuel cap mounting flange/sealing method defective |7.2.2c| | 1 |
| Rear Brake drum|s| securing bolt|s| loose |3.2.A1g| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Rear reflector on motorcycle damaged and function impaired |1.4.2a| | 1 |
| Stop lamp not working from rear brake pedal |4.3.1 |a| |ii|| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Wheel damaged significantly reducing the original strength |4.2.1a| | 1 |
| Rear wheel insecure |4.2.3b| | 1 |
| Centre Rear Lower Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Headlamp missing |1.2.3a| | 1 |
| Front Wheel excessively distorted |5.2.2 |c| |i|| | 1 |
| Fuel cap missing |7.2.2a| | 1 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 1 |
| Rear Brake has no recorded effort at a wheel |1.2.1 |a| |ii|| | 1 |
| Hydraulic brake control creeps under load. |3.1.4a| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Brake pedal has insufficient reserve travel |1.1.2 |a|| | 1 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Centre Front Throttle operating incorrectly |6.2.1f| | 1 |
| Front Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Brake component is severely distorted |3.1.5| | 1 |
| Front Brake component is severely distorted |3.1.5| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Nearside Front 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 |
| Front wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Offside Rear Lower Brake effort inadequate at a wheel |1.2.1 |a| |i|| | 1 |
| Central Front Upper Handlebar so insecure it is likely to become detached |2.2.1 |b| |ii|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Headlamp aim not tested |1.6| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Brake reaction bracket insecure |3.2.A1j| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Brake hose excessively deteriorated | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Fuel system component leaking |6.1.3 |b| |i|| | 1 |
| Riders seat insecure |6.2.5 |a| |ii|| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Headlamp main beam affected by the operation of the horn |1.2.2c| | 1 |
| Brake pipe union leaking fluid front caliper |3.2.B4| | 1 |
| Rear Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Brake hose excessively kinked |3.2.B3a| | 1 |
| Rear Brake lagging in operation |1.2.1 |d|| | 1 |
| Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Centre Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Brake pedal mounting insecure |3.1.2a| | 1 |
| Front Headlamp dipped beam flickers when tapped lightly by hand |1.2.2c| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Stop lamp missing |1.3.3a| | 1 |
| Nearside Rear Upper Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Rear Position lamp light intensity significantly reduced |4.2.3 |a| |ii|| | 1 |
| Rear Position lamp lens seriously defective |4.2.1 |b|| | 1 |
| Position lamp showing white light to the rear |4.2.3 |a| |ii|| | 1 |
| Front Brake caliper insecure |1.1.16 |c| |i|| | 1 |
| Nearside Front Front suspension assembly component loose shock absorber |2.3.1| | 1 |
| Handlebar mounting excessively deteriorated |flexible type| |2.1.1d| | 1 |
| Nearside Steering lock stop missing |2.1.3| | 1 |
| Offside Steering lock stop missing |2.1.3| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Front Front position lamp missing |1.1.1a| | 1 |
| Headlamp main beam flickers when tapped lightly by hand |1.2.2c| | 1 |
| Front Brake back plate|s| insecure |3.2.A1j| | 1 |
| Brake pedal insecure |3.1.2a| | 1 |
| Rear Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Rear Built up wheel has a bolt/s missing |4.2.1c| | 1 |
| Rear Rear position lamp obscured more than 50% |1.1.1d| | 1 |
| Rear Built up wheel has a loose bolt/s |4.2.1c| | 1 |
| Rear Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Position lamp switch does not operate the front and rear position lamps |1.1.4c| | 1 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Front Steering linkage has excessive free play |2.2.2| | 1 |
| Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Front wheel spindle loose |2.3.3a| | 1 |
| Rear wheel has a missing wheel nut|s| |4.2.3a| | 1 |
| Front suspension assembly component missing |2.3.1| | 1 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Nearside Front Shock absorber insecurely attached |5.3.2 |a| |i|| | 1 |
| Offside Front Brake lever has insufficient reserve travel |1.1.2 |a|| | 1 |
| Central Rear Brake lever has insufficient reserve travel |1.1.2 |a|| | 1 |
| Front Roller brake test indicates a binding brake (3.3.A1a) | 1 |
| Front Brake pipe union leaking fluid (3.2.B4) | 1 |
| Brake pedal has inadequate reserve travel (3.1.3b) | 1 |
| Headlamp at least one does not illuminate on dipped beam (1.2.2a(i)) | 1 |
| Front Brake lever has inadequate reserve travel (3.1.3b) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Rear Brake pedal insecure (1.1.2 (e) (i)) | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Rear Exhaust system insecure (6.1.2 (a)) | 1 |
| Fuel pipe leaking (6.1.3 (b) (i)) | 1 |
| Front Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Exhaust system insecure (6.1.2 (a)) | 1 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |