| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 21 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 19 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 16 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 14 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 14 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 12 |
| Drive chain excessively loose |6.2.1d| | 10 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Steering headbearing has excessive free play |2.2.2| | 6 |
| Nearside Front Footrest insecure |6.2.1a| | 6 |
| Horn not working |1.7.3a| | 6 |
| Riders seat insecure |6.2.1a| | 6 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 5 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Direction indicators not working |1.5.1c| | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Registration plate issues | 3 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 3 |
| Fuel system component insecure |7.2.1b| | 3 |
| Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 3 |
| Nearside Rear Direction indicators not working |1.5.1c| | 3 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Front Front mudguard insecure |2.3.7| | 2 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| 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| | 2 |
| Front Decelerometer brake test indicates a binding brake |3.3.E1d| | 2 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Seat insecure |6.2.1a| | 2 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Front Steering control handlebar movement restricted by cables caught on a projection |2.1.2c| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Chain guard insecure |6.2.1c| | 1 |
| Roller brake test brake efficiency less than 27.5% overall (1.2.2 (a) (ii)) | 1 |
| Front Position lamp likely to become detached both (4.2.1 (c) (ii)) | 1 |
| Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Rear position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Nearside Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Offside Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Nearside Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Front position lamp does not face the front |1.1.1d| | 1 |
| Nearside Steering lock stop missing |2.1.3| | 1 |
| Nearside Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Centre Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front Upper Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front Lower Steering movement excessively rough with the wheel raised |2.2.1b| | 1 |
| Headlamp main beam affected by the operation of the horn |1.2.2c| | 1 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Brake caliper|s| insecure |3.2.A1j| | 1 |
| Front Front wheel spindle loose |2.3.3a| | 1 |
| Centre Riders seat insecure |6.2.1a| | 1 |
| Rear Front mudguard insecure |2.3.7| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Rear mono-shock insecure |2.4.B.4| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Headlamp aim so that beam "kick up" is not visible on the screen dip not bright enough (4.1.2 (a)) | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Headlamp not working on dipped beam R & L (4.1.1 (a) (ii)) | 1 |
| Front Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Nearside Front Direction indicator not working less than 50% of led lamps working |1.5.1c| | 1 |
| Fuel system component leaking tap |7.2.1a| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Front Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Footrest insecure |6.2.1a| | 1 |
| Brake hose damaged | 1 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Front Direction indicator insecure |1.5.3b| | 1 |
| Nearside Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Centre Rear Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Offside Front Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 1 |
| Front Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Front Steering lock stop ineffective |2.1.3| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Offside Rear Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Offside Rear 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 Drive chain excessively loose |6.2.1d| | 1 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Rear Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Rear Decelerometer brake test indicates a binding brake |3.3.E1d| | 1 |
| 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 |
| Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Decelerometer brake test the less effective brake control does not achieve an efficiency of 25%. |3.3.E1b| | 1 |
| Offside Steering lock stop maladjusted |2.1.3| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| An item not tested |Manual| | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Headlamp light intensity severely reduced (4.1.4 (a)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 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 |
| Front Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Rear Rear position lamp incorrect colour |1.1.2b| | 1 |
| Rear Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Front Brake cylinder insecurely mounted |3.2.B1a| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Front Front position lamp damaged and function impaired |1.1.1b| | 1 |
| Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Front suspension assembly component excessively corroded. |2.3.1| | 1 |
| Rear Brake pedal is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Front Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Nearside Rear Footrest missing |6.2.12 |a|| | 1 |
| Offside Rear Footrest missing |6.2.12 |a|| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| All direction indicators not working All |4.4.1 |a| |ii|| | 1 |
| Front Brake disc contaminated Contaminated with oil |1.1.14 |b|| | 1 |
| Front Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Rear Brake pedal cannot be released smoothly rear brake pedal sticking |3.1.3d| | 1 |
| Offside Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Fairings insecure and likely to impede the steering all the front end is very looose |2.1.2e| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Nearside Footrest insecure Rider footrest. (6.2.12 (a)) | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Pillion seat insecure (6.2.6 (a) (ii)) | 1 |
| Registration plate lamp issues | 1 |
| Rear All position lamps not working (4.2.1 (a)) | 1 |
| Front Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 1 |
| Front Wheel bearing play so excessive that directional control is impaired (5.1.3 (a) (ii)) | 1 |
| Offside Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Brake caliper inadequately mounted (1.1.16 (c) (i)) | 1 |
| Rear Brake master cylinder has an excessively worn master cylinder pivot. |3.2.B5| | 1 |
| Offside Steering operation impeded by a fairing (2.1.4 (e)) | 1 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Headlamp aim not tested Not bright enough to give reading (4.1.2 (b)) | 1 |
| Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Horn sound not in accordance with requirements |7.7 |c|| | 1 |
| Headlamp aim not tested Too dim for beam pattern to be assessed |4.1.2 |b|| | 1 |
| Stop lamp not working From operation by front brake control |4.3.1 |a| |ii|| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Nearside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear wheel spindle loose |2.4.A.2b| | 1 |
| Front Brake lever pivots excessively worn |3.1.3a| | 1 |