| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 19 |
| Registration plate issues | 13 |
| Rear reflector on motorcycle missing |1.4.1| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Registration plate lamp issues | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Offside Rear Footrest insecure |6.2.1a| | 2 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Drive chain excessively loose |6.2.1d| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Headlamp aim not tested |4.1.2 |b|| | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Front Direction indicators not working Both not flashing |1.5.1c| | 1 |
| Rear Direction indicators not working Both not flashing |1.5.1c| | 1 |
| Front Steering headbearing has excessive free play Excessive notchiness |2.2.2| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Upper Brake cylinder insecure |1.1.16 |c| |i|| | 1 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Nearside Front Brake excessively binding |1.2.1 |f|| | 1 |
| Offside Front Brake excessively binding |1.2.1 |f|| | 1 |
| Lower Suspension arm mounting has an unsafe modification |5.3.3 |c| |i|| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Throttle operating incorrectly |6.2.7 |a| |i|| | 1 |
| Riders seat insecure |6.2.5 |a| |ii|| | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Offside Rear Footrest missing (6.2.12 (a)) | 1 |
| Central Front Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Central Rear Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Central Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Front Brake lever is bent and the brake cannot be readily applied front lever hitting handle bar (1.1.2 (d)) | 1 |
| Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Nearside Steering linkage locking device missing (2.1.3 (d)) | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Brake lever has abnormal movement of levers indicating excessive wear or maladjustment |1.1.15 |f|| | 1 |
| Offside Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Offside Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Front Wheel spindle loose (5.2.1 (c) (i)) | 1 |
| Brake pedal insecure Tip loose (1.1.2 (e) (i)) | 1 |
| Brake hose damaged | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Rear Upper Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Stop lamp does not illuminate immediately a brake applies rear switch |1.3.1a| | 1 |
| Front Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Nearside Front Footrest missing |6.2.1a| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Nearside Front position lamp incorrect colour |1.1.2a| | 1 |
| Offside Front position lamp incorrect colour |1.1.2a| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Rear Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Brake pedal cracked |3.1.2c| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 1 |
| Rear Brake grabbing severely |1.2.1 |c|| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Front Steering headbearing has excessive free play Excessively notchy |2.2.2| | 1 |
| Headlamp at least one does not illuminate on dipped beam dip beam does not work |1.2.2a|i|| | 1 |
| Central Rear Stop lamp does not illuminate by the operation of both brake controls Rear brake switch adjusted (4.3.2 (a) (iii)) | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Exhaust has a major leak of exhaust gases Leak from manifold at the cylinder head (6.1.2 (a)) | 1 |
| Brake fluid not visible (1.1.10 (d) (iii)) | 1 |
| Brake hose connection leaking (1.1.12 (c)) | 1 |
| Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |