| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 46 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 17 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 15 |
| Drive chain excessively loose |6.2.1d| | 14 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 10 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 10 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 9 |
| Horn not working |1.7.3a| | 8 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Drive chain worn to excess |6.2.1e| | 7 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 7 |
| Registration plate issues | 5 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 5 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 4 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Nearside Front Direction indicators not working |1.5.1c| | 3 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 3 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Rear Drive chain excessively loose |6.2.1d| | 3 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 3 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Front Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 2 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Front Direction indicator not working |1.5.1c| | 2 |
| Rear Direction indicator not working |1.5.1c| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 2 |
| Offside Front Direction indicators not working |1.5.1c| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Rear Brake excessively binding |1.2.1 |f|| | 2 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Motorcycle structure joining/attachment plate or fastening insecure bolt missing |6.1.1 |b| |i|| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Headlamp dipped beam flickers when tapped lightly by hand |1.2.2c| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Nearside Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Front Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Inner Rear Upper Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Shock absorber has a serious fluid leak left fork oil seal leaking |5.3.2 |b|| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Fairing so located that it is likely to impede the steering |2.1.2e| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Rear Brake pedal attachment screws missing. |3.1.2b| | 1 |
| Offside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Offside Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Offside Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 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 |
| Stop lamp remains on when the brakes are released | 1 |
| Indicator switch does not operate the direction indicators on the side selected |1.5.4| | 1 |
| Steering headbearing in such a condition that steering control is adversely affected |2.2.2 |f| |ii|| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Steering lock stop ineffective |2.1.3| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Offside Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Offside Rear Drive chain worn to excess |6.2.1e| | 1 |
| Front Indicator switch defective |1.5.4| | 1 |
| Nearside Handlebar fouling on the fuel tank or bodywork on full lock |2.1.4 |b|| | 1 |
| Offside Handlebar fouling on the fuel tank or bodywork on full lock |2.1.4 |b|| | 1 |
| Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Direction indicators affected by the operation of another lamp all indicators |1.5.1c| | 1 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Central Rear Lower Suspension component modified so the suspension is inoperative |5.3.3 |c| |ii|| | 1 |
| Central Rear Upper Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front Brake caliper|s| insecure |3.2.A1j| | 1 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Brake performance not tested due to pads worn out |1.2.1 |g|| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected |6.2.7 |a| |ii|| | 1 |
| Stop lamp does not illuminate immediately a brake applies both front and rear |1.3.1a| | 1 |
| Nearside Front Roller brake test indicates excessive fluctuation of brake effort 7 bars of fluctuation on roller tester |3.3.A1d| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Front Front suspension assembly component missing |2.3.1| | 1 |
| Front Horn not working |7.7 |a| |ii|| | 1 |
| Centre Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Centre Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Upper Steering lock stop ineffective |2.1.3| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Brake hose fouling |3.2.B3b| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 1 |
| Offside Rear Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Rear Stop lamp deteriorated and function impaired Dirt and rust to contacts preventing break light from functioning, dismantled cleaned contacts and reassembled. |1.3.3a| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Nearside Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Centre Rear Drive belt excessively loose. |6.2.1d| | 1 |
| Nearside Front Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Front Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Front Fairing insecure and likely to impede the steering |2.1.2e| | 1 |
| Offside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| An item not tested |Manual| | 1 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Front position lamp missing |1.1.1a| | 1 |
| Headlamp aim headlamp deteriorated and function impaired No clear beam pattern |1.2.3a| | 1 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Rear Brake lagging in operation |1.2.1 |d|| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Nearside Drive chain excessively tight |6.2.1d| | 1 |
| Nearside Front Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Rear Stop lamp insecure |1.3.3b| | 1 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Rear mono-shock pivot seized |2.4.B.4| | 1 |
| Offside Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Nearside Front suspension assembly component missing |2.3.1| | 1 |
| Offside Front suspension assembly component loose |2.3.1| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Wheel bearing so rough it is likely to overheat or break up |5.1.3 |b| |ii|| | 1 |
| Rear Brake disc significantly and obviously worn |1.1.14 |a| |i|| | 1 |
| Horn missing replaced |1.7.1| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| All position lamps not working NO LOW BEAM OR REAR LIGHT |4.2.1 |a|| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Headlamp damaged and function impaired |1.2.3a| | 1 |
| Front Headlamp light source and lamp not compatible HID KIT FITTED IN STANDARD HEADLIGHT
NO PATTERN AT ALL (4.1.4 (c)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |