| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 19 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 13 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 8 |
| Rear reflector on motorcycle missing |1.4.1| | 7 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 6 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Throttle operating incorrectly |6.2.1f| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 5 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Brake hose excessively deteriorated | 3 |
| Horn not working |1.7.3a| | 3 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 3 |
| Nearside Front Direction indicator not working |1.5.1c| | 3 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Rear Brake locking device missing |3.2.A1e| | 2 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 2 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Handlebar mounting clamp loose |2.1.1a| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Rear Fairings insecure and likely to impede the steering |2.1.2e| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Upper Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Rear Brake lever excessively chafed |3.2.A1a| | 1 |
| Nearside Front Upper Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Registration plate issues | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Rear Brake lever attachment screws loose |3.1.2b| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Rear Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Front Brake component defective due to a deliberate modification which significantly reduces the original strength |3.1.5| | 1 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 1 |
| Rear Suspension arm pin or bush excessively worn |5.3.4 |a| |i|| | 1 |
| Rear Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Fuel system component leaking |6.1.3 |b| |i|| | 1 |
| Front Brake hose damaged and likely to fail |1.1.12 |a|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Direction indicators not working left and right indicators not flashing |1.5.1c| | 1 |
| Front 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 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Offside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|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 |
| Brake component has an inadequate repair |3.1.5| | 1 |
| Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Handlebar handgrip missing |2.1.1c| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Front Upper Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Rear Brake lever has insufficient reserve travel |1.1.2 |a|| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Seat insecure |6.2.1a| | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Headlamp damaged and function impaired |1.2.3a| | 1 |
| Motorcycle structure excessively distorted |6.1.1a| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Nearside Brake lever mounting insecure |3.1.2a| | 1 |
| Rear Brake lever insecure |3.1.2a| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Brake lever mounting insecure |3.1.2a| | 1 |
| Rear Brake cable has a significantly damaged outer casing. |3.2.A1b| | 1 |
| Rear Brake component cracked and seriously reduced in strength |3.2.A1| | 1 |
| Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Nearside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Brake hose damaged | 1 |
| Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Nearside Rear Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Offside Rear Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Front Fairings insecure and likely to impede the steering mudguard |2.1.2e| | 1 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Rear Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Direction indicator flashing more than 120 times per minute all |1.5.1c| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Rear Rear wheel insecure |4.2.3b| | 1 |
| Fuel hose leaking |7.2.1a| | 1 |
| Front Front mudguard insecure |2.3.7| | 1 |
| Rear suspension bush has excessive free play engine mountings |2.4.A2a|i|| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |