| Most common failures | No# failures |
|---|
| Handlebar mounting excessively deteriorated |flexible type| |2.1.1d| | 19 |
| Headlamp aim out of alignment | 19 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 18 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 13 |
| Brake hose excessively deteriorated | 9 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Front Handlebar mounting excessively deteriorated |flexible type| |2.1.1d| | 7 |
| Front Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 7 |
| Stop lamp remains on when the brake is released |1.3.1e| | 6 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 5 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Riders seat insecure |6.2.1a| | 4 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Horn not working |1.7.3a| | 3 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 3 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Registration plate issues | 2 |
| Offside Front Brake disc|s| insecure |3.2.A1g| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Front Brake disc|s| insecure |3.2.A1g| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Offside Throttle operating incorrectly |6.2.1f| | 1 |
| Front Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Front Brake hose leaking fluid |3.2.B4| | 1 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Nearside Brake reaction bracket insecure |3.2.A1j| | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Riders seat insecure |6.2.1a| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Front Headlamp incorrect colour |1.2.1| | 1 |
| Front Brake pipe inadequately supported |3.2.B2b| | 1 |
| Front Front mudguard insecure |2.3.7| | 1 |
| Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Rear Brake disc|s| cracked |3.2.A1g| | 1 |
| Rear Brake pipe union leaking fluid |3.2.B4| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Stop lamp does not emit a steady light control 1 or 2 not working |1.3.1b| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort pads and discs contaminated with oil from leaking front forks |3.3.A1c| | 1 |
| Nearside Front Brake component leaking fluid calipier |3.2.B4| | 1 |
| Nearside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear Brake lever excessively corroded |3.2.A1c| | 1 |
| Rear Brake performance not tested |3.3| | 1 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking Handlebar mountings are excessively worn. |6.1.1c| | 1 |
| Sidecar front position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Nearside Front Handlebar mounting excessively deteriorated |flexible type| |2.1.1d| | 1 |
| Offside Front Handlebar mounting excessively deteriorated |flexible type| |2.1.1d| | 1 |
| Offside Front Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front Upper Front suspension assembly component loose |2.3.1| | 1 |
| Upper Front suspension assembly component loose |2.3.1| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Front suspension assembly component cracked |2.3.1| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Front Brake component leaking fluid |3.2.B4| | 1 |
| Brake pedal is inoperative |3.1.3c| | 1 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Headlamp aim headlamp deteriorated and function impaired no beam pattern |1.2.3a| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Rear suspension bush has excessive free play swing arm / shaft bushes worn to excess. |2.4.A2a|i|| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Rear Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Rear Rear mono-shock insecure |2.4.B.4| | 1 |
| Offside Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Offside Front Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Rear Brake component is fractured |3.1.5| | 1 |
| Rear Decelerometer brake test indicates a severely juddering brake |3.3.E1e| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Centre Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Nearside Front Lower Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Offside Front Lower Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Centre Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Front Brake master cylinder has a seized master cylinder pivot. |3.2.B5| | 1 |
| Offside Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Front Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |