| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 154 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 106 |
| Steering headbearing has excessive free play |2.2.2| | 83 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 77 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 71 |
| Drive chain excessively loose |6.2.1d| | 67 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 58 |
| Registration plate issues | 55 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 53 |
| Front wheel bearings are excessively rough |2.3.5b| | 39 |
| Drive chain worn to excess |6.2.1e| | 39 |
| Nearside Rear Footrest missing |6.2.1a| | 39 |
| Front wheel bearings have excessive free play |2.3.5b| | 37 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 32 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 32 |
| Offside Rear Footrest missing |6.2.1a| | 32 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 30 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 30 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 28 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 28 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 27 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 27 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 26 |
| Nearside Handlebar mounting clamp bolt loose |2.1.1a| | 25 |
| Riders seat insecure |6.2.1a| | 25 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 23 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 22 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 22 |
| Brake hose damaged | 22 |
| Rear reflector on motorcycle missing |1.4.1| | 21 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 21 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 21 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 20 |
| Drive chain excessively tight |6.2.1d| | 20 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 20 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 19 |
| Offside Handlebar mounting clamp bolt loose |2.1.1a| | 19 |
| Throttle operating incorrectly |6.2.1f| | 19 |
| Front Steering headbearing has excessive free play |2.2.2| | 18 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 18 |
| Rear Footrest missing |6.2.1a| | 17 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 15 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 14 |
| Nearside Rear Direction indicator not working |1.5.1c| | 14 |
| Horn not working |1.7.3a| | 14 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 13 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 13 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 12 |
| Headlamp aim beam image kick up to the offside |1.6| | 12 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 12 |
| Offside Handlebar mounting clamp loose |2.1.1a| | 12 |
| Nearside Handlebar mounting clamp loose |2.1.1a| | 12 |
| Direction indicators not working |1.5.1c| | 12 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 12 |
| Indicator switch insecure |1.5.4| | 12 |
| Fuel system component insecure |7.2.1b| | 12 |
| Offside Front Direction indicator not working |1.5.1c| | 11 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 11 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 11 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 11 |
| Rear Drive chain excessively loose |6.2.1d| | 11 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 10 |
| Nearside Front Direction indicator not working |1.5.1c| | 10 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 10 |
| Headlamp aim not tested |1.6| | 9 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 9 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 9 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 9 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 9 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 9 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 9 |
| Front position lamp incorrect colour |1.1.2a| | 9 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 8 |
| Rear Drive chain worn to excess |6.2.1e| | 8 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 8 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 8 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 8 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 8 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 8 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Handlebar mounting clamp loose |2.1.1a| | 8 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 7 |
| Offside Front Direction indicators not working |1.5.1c| | 7 |
| Offside Handlebar deformed |2.1.1b| | 7 |
| Front Front mudguard insecure |2.3.7| | 7 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 7 |
| Stop lamp remains on when the brake is released |1.3.1e| | 7 |
| Footrest missing |6.2.1a| | 7 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 7 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 7 |
| Handlebar deformed |2.1.1b| | 7 |
| Offside Rear Direction indicator not working |1.5.1c| | 7 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 7 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 7 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 6 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 6 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 6 |
| Front Upper Steering headbearing has excessive free play |2.2.2| | 6 |
| Offside Front Footrest insecure |6.2.1a| | 6 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 6 |
| Offside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 6 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 6 |
| Nearside Front Direction indicators not working |1.5.1c| | 6 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 6 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 6 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 6 |
| Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 6 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 6 |
| An item not tested |Manual| | 6 |
| Nearside Front Handlebar mounting clamp bolt loose |2.1.1a| | 6 |
| Front Direction indicators not working |1.5.1c| | 6 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 6 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 6 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 5 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 5 |
| Front Horn not working |1.7.3a| | 5 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 5 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 5 |
| Nearside Headlamp switch insecure |1.2.4| | 5 |
| Nearside Indicator switch insecure |1.5.4| | 5 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 5 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 5 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 5 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 5 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 5 |
| Exhaust excessively deteriorated |7.1.1a| | 5 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 5 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 5 |
| Offside Front Direction indicator missing |1.5.1a| | 5 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 5 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 5 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 5 |
| Drive chain fouling another component |6.2.1d| | 5 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 5 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 4 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 4 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 4 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 4 |
| Exhaust mounting missing |7.1.1c| | 4 |
| Front Brake pipe excessively chafed |3.2.B2a| | 4 |
| Rear Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 4 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Direction indicator not working |1.5.1c| | 4 |
| Nearside Front Footrest insecure |6.2.1a| | 4 |
| Offside Front Direction indicator insecure |1.5.3b| | 4 |
| Fuel cap mounting flange/sealing method defective |7.2.2c| | 4 |
| Rear Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 4 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 4 |
| Nearside Rear Direction indicators not working |1.5.1c| | 4 |
| Rear Direction indicator not working |1.5.1c| | 4 |
| Nearside Footrest insecure |6.2.1a| | 4 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 4 |
| Rear Rear shock absorber insecurely mounted |2.4.A.3b| | 4 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 4 |
| Offside Rear Direction indicators not working |1.5.1c| | 4 |
| Nearside Front Handlebar mounting clamp loose |2.1.1a| | 4 |
| Front Direction indicator missing |1.5.1a| | 4 |
| Nearside Front Direction indicator missing |1.5.1a| | 4 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 4 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 4 |
| Front Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 4 |
| Chain guard insecure |6.2.1c| | 4 |
| Headlamp switch faulty |1.2.4| | 4 |
| Headlamp switch insecure |1.2.4| | 4 |
| Front position lamp insecure |1.1.1c| | 4 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 4 |
| Centre Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 4 |
| Nearside Handlebar deformed |2.1.1b| | 4 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 4 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 4 |
| Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 4 |
| Fuel cap does not fasten securely by a positive means |7.2.2b| | 4 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 4 |
| Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 4 |
| Nearside Direction indicator not working |1.5.1c| | 4 |
| Brake performance not tested |3.3| | 4 |
| Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 4 |
| Offside Direction indicator not working |1.5.1c| | 4 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 4 |
| Offside Footrest insecure |6.2.1a| | 3 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 3 |
| Front suspension has inadequate damping effect. |2.3.6c| | 3 |
| Rear Brake hose fouling |3.2.B3b| | 3 |
| 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| | 3 |
| Rear Seat insecure |6.2.1a| | 3 |
| Rear Rear position lamp insecure |1.1.1c| | 3 |
| Front Headlamp insecure |1.2.3b| | 3 |
| Rear position lamp insecure |1.1.1c| | 3 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 3 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 3 |
| Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 3 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 3 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 3 |
| Front Riders seat insecure |6.2.1a| | 3 |
| Brake pedal is damaged and the brake cannot be readily applied |3.1.3c| | 3 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 3 |
| Front Direction indicator not working |1.5.1c| | 3 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 3 |
| Fuel system component leaking |7.2.1a| | 3 |
| Rear Drive chain excessively tight |6.2.1d| | 3 |
| Rear Brake pedal is damaged and the brake cannot be readily applied |3.1.3c| | 3 |
| Front suspension assembly component loose |2.3.1| | 3 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 3 |
| Offside Fairings insecure and likely to impede the steering |2.1.2e| | 3 |
| Nearside Front Handlebar deformed |2.1.1b| | 3 |
| Offside Front Handlebar deformed |2.1.1b| | 3 |
| Offside Front Handlebar mounting clamp bolt loose |2.1.1a| | 3 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Rear Brake caliper|s| insecure |3.2.A1j| | 3 |
| Rear Brake pedal is inoperative |3.1.3c| | 3 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 3 |
| Horn is not a constant note |1.7.3c| | 3 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Rear Rear mono-shock pivot excessively worn |2.4.B.4| | 3 |
| Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 3 |
| Offside Steering lock stop ineffective |2.1.3| | 3 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 3 |
| Nearside Drive chain worn to excess |6.2.1e| | 3 |
| Fuel cap sealing washer missing |7.2.2c| | 3 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 3 |
| Nearside Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 3 |
| Front mudguard insecure |2.3.7| | 3 |
| Brake pedal pivots excessively worn |3.1.3a| | 3 |
| Rear Exhaust mounting missing |7.1.1c| | 3 |
| Nearside Front Direction indicator insecure |1.5.3b| | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Horn not working (7.7 (a) (ii)) | 3 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |