| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 58 |
| Drive chain excessively loose |6.2.1d| | 39 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 20 |
| Drive chain worn to excess |6.2.1e| | 14 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 13 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 8 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 7 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 6 |
| Steering headbearing has excessive free play |2.2.2| | 6 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 5 |
| Registration plate issues | 5 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 5 |
| Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Drive chain excessively tight |6.2.1d| | 5 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Offside Rear Direction indicators not working |1.5.1c| | 3 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 3 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 3 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Rear Direction indicator not working |1.5.1c| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 2 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Registration plate lamp issues | 2 |
| Rear Stop lamp missing |1.3.3a| | 2 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Rear Drive chain excessively loose |6.2.1d| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Fuel cap leaking |6.1.3 |b| |i|| | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Brake grabbing severely (1.2.1 (c)) | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Stop lamp not working Brake light not operated by front control lever |4.3.1 |a| |ii|| | 1 |
| Rear Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Offside Front Upper Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Stop lamp missing |1.3.3a| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Stop lamp does not illuminate immediately a brake applies from brake pedal |1.3.1a| | 1 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Front Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Rear Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition |8.1.1 |a|| | 1 |
| Nearside Rear All direction indicators obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Offside Rear All direction indicators obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Stop lamp missing |1.3.3a| | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Nearside Front Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Front Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Rear Wheel bearing has excessive play Cush Drive / Sprocket Carrier Bearings. (5.1.3 (a) (i)) | 1 |
| Offside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Throttle operating incorrectly |6.2.7 |a| |i|| | 1 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Front Horn not working |7.7 |a| |ii|| | 1 |
| Offside Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Front Brake hose fouling |3.2.B3b| | 1 |
| Fuel hose leaking |7.2.1a| | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Drive chain so loose it is likely to fail adjusters incorrectly set and lock nuts insecure (6.1.7 (c) (ii)) | 1 |
| Offside Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear Brake lining|s| less than 1.0 mm thick |1.1.13 |a|| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Brake pedal has insufficient reserve travel |1.1.2 |a|| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Offside Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear mono-shock insecure |2.4.B.4| | 1 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Offside Front An item not tested |Manual| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Clutch lever positioned so it cannot be readily operated. clutch not operating correctly/dragging |6.2.1g| | 1 |
| Clutch lever positioned so it cannot be readily operated. clutch not working correctly/dragging |6.2.1g| | 1 |
| Direction indicators not working intermittant/affected by horn |1.5.1c| | 1 |
| Headlamp switch faulty pass/ flash button sticking |1.2.4| | 1 |
| Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Rear Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Offside Front Footrest insecure (6.2.12 (a)) | 1 |
| Offside Rear Footrest insecure (6.2.12 (a)) | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| An item not tested |Manual| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Brake component damaged and seriously reduced in strength |3.2.A1| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Nearside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Offside Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Upper Rear mono-shock insecure |2.4.B.4| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Front wheel spindle loose |2.3.3a| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 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 Direction indicators not working |1.5.1c| | 1 |
| Lower Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Upper Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Nearside Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Clutch lever positioned so it cannot be readily operated. broken |6.2.1g| | 1 |
| Brake pedal has inadequate reserve travel hits exhaust |3.1.3b| | 1 |
| Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Stop lamp not working front an d rear (4.3.1 (a) (ii)) | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Handlebar deformed bent |2.1.1b| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Rear reflector likely to become detached Falling off, re glued it (4.8.1 (b) (ii)) | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Centre Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Floor brake test indicates a binding brake |3.3.C2c| | 1 |