| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 30 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Headlamp insecure |1.2.3b| | 6 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 6 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Drive chain excessively loose |6.2.1d| | 5 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Offside Steering lock stop ineffective |2.1.3| | 5 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Front wheel bearings are excessively rough |2.3.5b| | 4 |
| Offside Rear Direction indicator not working |1.5.1c| | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Handlebar deformed |2.1.1b| | 3 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 3 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Registration plate issues | 2 |
| Horn not working |1.7.3a| | 2 |
| Front Position lamp not working (4.2.1 (a)) | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Front Headlamp insecure |1.2.3b| | 2 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Front Chain guard insecure |6.2.1c| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Stop lamp not working With rear brake |4.3.1 |a| |ii|| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 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 |
| Front Hydraulic brake control creeps under load. |3.1.4a| | 1 |
| Riders seat missing |6.2.1a| | 1 |
| Nearside Front Shock absorber has a serious fluid leak fork (5.3.2 (b)) | 1 |
| Offside Front Shock absorber has a serious fluid leak fork (5.3.2 (b)) | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Front Steering lock stop maladjusted |2.1.3| | 1 |
| Front Stop lamp missing |1.3.3a| | 1 |
| Front Brake lever is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride footrest |6.2.1h| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear Brake clevis joint insecure (1.1.15 (c)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Front position lamp flickers when tapped lightly by hand |1.1.3c| | 1 |
| Front Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Headlamp at least one does not illuminate on main beam Headlight goes out on lock to lock! |1.2.2a|ii|| | 1 |
| Rear Wheel spoke missing (5.2.2 (d)) | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Rear Wheel spoke cracked. |4.2.1b| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Offside Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Rear Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Centre Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Brake pedal not releasing correctly and functionality of brakes affected pivot seized |1.1.2 |b| |ii|| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Steering lock stop ineffective |2.1.3| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Lower Exhaust excessively deteriorated |7.1.1a| | 1 |
| Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Centre Riders seat insecure |6.2.1a| | 1 |
| Offside Brake pedal insecure |3.1.2a| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Nearside Front Steering lock stop ineffective |2.1.3| | 1 |
| Centre Rear Lower Exhaust is leaking and excessively noisey |7.1.1b| | 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 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Front Wheel spoke excessively bent |4.2.1b| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Front Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Front Front mudguard insecure |2.3.7| | 1 |
| Nearside Rear Drive chain worn to excess |6.2.1e| | 1 |
| Nearside Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Indicator switch defective |1.5.4| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Front Throttle operating incorrectly |6.2.1f| | 1 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Wheel spoke missing |4.2.1b| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Offside Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Offside Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |