| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 14 |
| Horn not working |1.7.3a| | 8 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Steering headbearing has excessive free play |2.2.2| | 7 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 5 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 4 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Headlamp dipped beam affected by the operation of the horn |1.2.2c| | 3 |
| Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Registration plate issues | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Centre Rear Upper Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Front Steering lock stop ineffective |2.1.3| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Offside Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Centre Front Upper Headlamp switch faulty |1.2.4| | 1 |
| 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 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Front suspension assembly component loose |2.3.1| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front wheel has a missing wheel stud|s| |4.2.3a| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Front Lower Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Lower Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Front wheel has a missing wheel nut|s| |4.2.3a| | 1 |
| Front Brake caliper|s| insecure |3.2.A1j| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Front wheel spindle loose |2.3.5a| | 1 |
| Front Brake back plate|s| insecure |3.2.A1j| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Offside Front Throttle operating incorrectly |6.2.1f| | 1 |
| Rear Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Headlamp main beam affected by the operation of the horn |1.2.2c| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Brake hose fouling |3.2.B3b| | 1 |
| Fuel cap sealing washer missing |7.2.2c| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Rear Brake lever excessively chafed |3.2.A1a| | 1 |
| Front Brake cable insecure |1.1.15 |c|| | 1 |
| Brake hose excessively deteriorated | 1 |
| Centre Front Upper Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Centre Front Upper Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Centre Front Upper Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Centre Rear Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front Riders seat insecure |6.2.1a| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Rear Riders seat insecure |6.2.1a| | 1 |
| Rear Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Rear Brake pedal has insufficient reserve travel |1.1.2 |a|| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 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 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Fuel cap missing |7.2.2a| | 1 |
| Brake lever mounting insecure |3.1.2a| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Plate brake test The less effective brake control does not achieve an efficiency of 25%. (3.3.B2b) | 1 |
| Fuel system component leaking excessively or a risk of fire (6.1.3 (b) (ii)) | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |