| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 58 |
| Steering headbearing has excessive free play |2.2.2| | 29 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 24 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 24 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 22 |
| Front wheel bearings are excessively rough |2.3.5b| | 18 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 16 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 14 |
| Riders seat insecure |6.2.1a| | 13 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 13 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Horn not working |1.7.3a| | 12 |
| Registration plate issues | 12 |
| Headlamp insecure |1.2.3b| | 11 |
| Rear reflector on motorcycle missing |1.4.1| | 11 |
| Front wheel bearings have excessive free play |2.3.5b| | 10 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 10 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 9 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 8 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 8 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 8 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 8 |
| Stop lamp remains on when the brake is released |1.3.1e| | 7 |
| Nearside Rear Direction indicators not working |1.5.1c| | 6 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 6 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 6 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 5 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 5 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 5 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 5 |
| Registration plate lamp issues | 5 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 5 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 5 |
| Front mudguard insecure |2.3.7| | 5 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 4 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 4 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 4 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 4 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 4 |
| Nearside Rear Direction indicator not working |1.5.1c| | 4 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Nearside Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 3 |
| Offside Front Direction indicators not working |1.5.1c| | 3 |
| Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Horn sounds harsh or grating |1.7.3c| | 3 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 3 |
| Brake hose damaged | 3 |
| Exhaust excessively deteriorated |7.1.1a| | 3 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 3 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 3 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Offside Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 3 |
| Direction indicator incorrect colour |1.5.1b| | 3 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 2 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 2 |
| All position lamps adversely affected by the operation of the horn |1.1.3b| | 2 |
| Engine mounting/bracket bracket damaged or deteriorated resulting in excessive movement |6.1.8 |a| |i|| | 2 |
| Nearside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 2 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 2 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 2 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 2 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Rear reflector on motorcycle obscured |1.4.1| | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Offside Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Front Brake lever is so short that the brake cannot be readily applied (1.1.2 (d)) | 2 |
| Rear Brake lever insecure lever point broken (1.1.2 (e) (i)) | 2 |
| Indicator switch defective |1.5.4| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Rear position lamp incorrect colour |1.1.2b| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Horn not working (7.7 (a)) | 2 |
| Headlamp aim not tested (4.1.2 (b)) | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| All direction indicators not working (4.4.1 (a) (ii)) | 2 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 2 |