| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 24 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 16 |
| Headlamp aim beam image kick up to the offside |1.6| | 10 |
| Drive chain excessively loose |6.2.1d| | 10 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 8 |
| Rear Wheel corroded significantly reducing the original strength |4.2.1a| | 6 |
| Registration plate issues | 5 |
| Drive chain excessively tight |6.2.1d| | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear reflector on motorcycle missing |1.4.1| | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Front Brake excessively binding (1.2.1 (f)) | 4 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Offside Front Direction indicator not working |1.5.1c| | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Rear Wheel spoke excessively loose |4.2.1b| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Nearside Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Offside Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 2 |
| Handlebar mounting clamp loose |2.1.1a| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Rear position lamp damaged and function impaired |1.1.1b| | 2 |
| Offside Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Rear Brake excessively binding (1.2.1 (f)) | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Rear suspension movement is excessively stiff No movement. |2.4.A.3b| | 1 |
| Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Offside Front Upper Throttle operating incorrectly |6.2.1f| | 1 |
| Nearside Front Upper Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Front Upper Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Steering lock stop ineffective handle bar hitting tank |2.1.3| | 1 |
| Front Throttle operating incorrectly |6.2.1f| | 1 |
| Rear suspension bearing has excessive free play lower linkage |2.4.A2a|i|| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Nearside Indicator switch does not operate the direction indicators on the side selected |1.5.4| | 1 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Throttle operating incorrectly throttle grip was sticking |6.2.1f| | 1 |
| Rear Wheel spoke excessively bent |4.2.1b| | 1 |
| Rear Wheel spoke cracked. |4.2.1b| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Front suspension has a fracture of a load bearing member or its supporting structure. |2.3.8| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Fuel cap mounting flange/sealing method defective |7.2.2c| | 1 |
| Front Wheel corroded significantly reducing the original strength |4.2.1a| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Decelerometer brake test indicates a sticking brake |3.3.E1d| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 1 |
| Front Wheel fractured significantly reducing the original strength |4.2.1a| | 1 |
| Rear Wheel fractured significantly reducing the original strength |4.2.1a| | 1 |
| Nearside Brake pedal attachment screws loose |3.1.2b| | 1 |
| Fairings so located that it is likely to impede the steering |2.1.2e| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Nearside Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Offside Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Offside Front Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Rear Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Offside Front Steering lock stop ineffective |2.1.3| | 1 |
| Nearside Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Nearside Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Nearside Handlebar mounting excessively deteriorated |flexible type| |2.1.1d| | 1 |
| Offside Handlebar mounting excessively deteriorated |flexible type| |2.1.1d| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Rear wheel spindle loose |2.4.A.2b| | 1 |
| Rear Brake drum|s| securing bolt|s| missing |3.2.A1g| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Centre Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Stop lamp not working with rear brake operation |4.3.1 |a| |ii|| | 1 |
| Headlamp light source and lamp not compatible hid type bulb/lamp fitted, incorrect beam image |4.1.4 |c|| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Steering operation fouling on the fuel tank or bodywork on full lock hand guards fouling on bodywork on full lock |2.1.4 |b|| | 1 |
| Brake performance not tested |3.3| | 1 |
| Rear Brake performance not tested |3.3| | 1 |
| Horn not working |1.7.3a| | 1 |
| Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Offside Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Front Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Rear Gradient brake test indicates a severely juddering brake |3.3.D1d| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Front wheel spindle loose |2.3.3a| | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Nearside Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Offside Front Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Offside Front Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Front Brake caliper insecure (1.1.16 (c) (i)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Handlebar fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Offside Front Wheel more than one fixing loose (5.2.1 (a) (ii)) | 1 |
| Rear Wheel corroded to the extent that the wheel could break up (5.2.2 (c) (ii)) | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Direction indicator not working left hand (4.4.1 (a) (ii)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |