| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 70 |
| Registration plate issues | 34 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Drive chain excessively loose |6.2.1d| | 11 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| Rear Wheel spoke excessively loose |4.2.1b| | 5 |
| Rear reflector on motorcycle missing |1.4.1| | 5 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Offside Front Footrest insecure |6.2.1a| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Rear Brake locking device missing |3.2.A1e| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Nearside Front Footrest insecure |6.2.1a| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Fuel pipe leaking |7.2.1a| | 1 |
| Fuel pipe union leaking |7.2.1a| | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Handlebar grip insecure to handlebar throttle |2.2.1 |d| |ii|| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Central Front Position lamp not working (4.2.1 (a)) | 1 |
| Central Rear Position lamp not working (4.2.1 (a)) | 1 |
| Nearside Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Rear Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Offside Rear Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Centre Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Central Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Nearside Rear Direction indicator incorrect colour (4.4.3 (a)) | 1 |
| Rear wheel spindle securing nut locking device missing split pin |2.4.A.2b| | 1 |
| Offside Front Indicator switch inoperative |4.4.2 |a| |ii|| | 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 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Central Front Upper Position lamp not working (4.2.1 (a)) | 1 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Nearside Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Outer Front Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Offside Outer Rear Lower Footrest insecure |6.2.1a| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Nearside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Front Brake fluid not visible No visible brake fluid in front master cylinder (1.1.10 (d) (iii)) | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Headlamp reflector missing (4.1.1 (b) (ii)) | 1 |
| Direction indicators flashing more than 120 times per minute and o/s irregular |1.5.1c| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Nearside Fuel pipe leaking |7.2.1a| | 1 |
| Front Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 1 |
| Nearside Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Offside Exhaust system insecure (6.1.2 (a)) | 1 |
| Direction indicators flashing more than 120 times per minute (1.5.1c) | 1 |
| Rear reflector on motorcycle missing (1.4.1) | 1 |
| Front Brake component insecure brake lever pivot bolt insecure (1.1.21 (c)) | 1 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Suspension arm pin or bush excessively worn swing-arm main pivot bearing (5.3.4 (a) (i)) | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Offside Front Brake caliper leaking |1.1.16 |b| |i|| | 1 |
| Front Brake disc contaminated |1.1.14 |b|| | 1 |
| Front Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Nearside Rear Rear reflector missing |1.5.1a| | 1 |
| Registration plate lamp issues | 1 |
| Parking brake lever has no reserve travel |3.1.6b| | 1 |
| Rear Parking brake lever has no reserve travel |3.1.6b| | 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 |
| Rear Sidecar rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Offside Footrest missing |6.2.1a| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Rear Wheel spoke excessively loose All Rear Wheel Spokes Loose |4.2.1b| | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |