| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 28 |
| Headlamp aim out of alignment | 28 |
| Registration plate issues | 27 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 15 |
| Horn not working |1.7.3a| | 11 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 8 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 7 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Drive chain excessively loose |6.2.1d| | 7 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 6 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Nearside Front Direction indicator not working |1.5.1c| | 5 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 5 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Steering headbearing has excessive free play |2.2.2| | 5 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Offside Front Brake disc|s| excessively worn |3.2.A1l| | 4 |
| 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| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 3 |
| Rear reflector missing |4.8.2 |a| |ii|| | 3 |
| Nearside Rear Direction indicators not working |1.5.1c| | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 3 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 3 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| All direction indicators not working (4.4.1 (a) (ii)) | 2 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Nearside Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 2 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 2 |
| Rear Direction indicators not working |1.5.1c| | 2 |
| Rear Footrest missing |6.2.1a| | 2 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Fuel system component insecure |7.2.1b| | 2 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Brake hose leaking fluid |3.2.B4| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Front Front position lamp missing |1.1.1a| | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Brake lever insecure |3.1.2a| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Centre Rear Upper Rear reflector on motorcycle missing |1.4.1| | 1 |
| Centre Front Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Offside Front Lower Brake hose excessively kinked |3.2.B3a| | 1 |
| Centre Front Upper Horn not working |1.7.3a| | 1 |
| Centre Upper Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Rear Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Offside Front Brake disc|s| insecure |3.2.A1g| | 1 |
| Front suspension assembly component loose |2.3.1| | 1 |
| Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Lower Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Offside Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Riders seat insecure seat assembly/ tailpiece loose |6.2.1a| | 1 |
| Brake hose damaged | 1 |
| Centre Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Offside Direction indicator incorrect colour |1.5.1b| | 1 |
| 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 Brake pipe likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Headlamp dipped beam flickers when tapped lightly by hand |1.2.2c| | 1 |
| Headlamp main beam flickers when tapped lightly by hand |1.2.2c| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Rear Brake component insecure Brake Arm Bolt. |1.1.21 |c|| | 1 |
| Rear Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Front Horn control not functioning. |1.7.2b| | 1 |
| Front Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Steering damper in such a condition that the steering action is impaired. |2.1.2d| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front wheel spindle securing nut|s| loose |2.3.5a| | 1 |
| Nearside Motorcycle structure cracked |6.1.1a| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear Stop lamp does not emit a steady light goes off under full load of brake |1.3.1b| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Nearside Front Direction indicator missing |1.5.1a| | 1 |
| Offside Front Direction indicator missing |1.5.1a| | 1 |
| Offside Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Nearside Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Exhaust mounting missing |7.1.1c| | 1 |
| Nearside Handlebar deformed |2.1.1b| | 1 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Front Brake component defective due to a deliberate modification which significantly reduces the original strength |3.1.5| | 1 |
| Rear reflector on sidecar missing |1.4.1| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear reflector on motorcycle insecure |1.4.2c| | 1 |
| Rear position lamp incorrect colour showing white light to rear |1.1.2b| | 1 |
| Front Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Rear Brake master cylinder severely damaged |3.2.B1b| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Inner Front Lower Fairing so located that it is likely to impede the steering |2.1.2e| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Fairing insecure and likely to impede the steering |2.1.2e| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Front Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Rear Stop lamp switch with a delay in operation |4.3.2 |a| |ii|| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Front Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Riders seat with a defective supporting structure |6.2.5 |a| |i|| | 1 |
| Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Front Wheel damaged or distorted to the extent that control of the motorcycle is likely to be adversely affected (5.2.2 (c) (ii)) | 1 |
| Front Wheel excessively distorted (5.2.2 (c) (i)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Horn missing |1.7.1| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Offside Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Steering lock stop missing |2.1.3| | 1 |
| Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Nearside Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Nearside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Nearside Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Steering damper in such a condition that the steering action is impaired. left lock |2.1.2d| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering indicator wiring hanging down on both front lamps |2.1.2a| | 1 |
| Rear Shock absorber insecurely attached (5.3.2 (a) (i)) | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Stop lamp switch with a delay in operation goes off when brake full down (4.3.2 (a) (ii)) | 1 |
| Upper Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Lower Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Front Brake hose stretched by suspension movement |3.2.B3b| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| An item not tested |Manual| | 1 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Front Brake fluid reservoir severely damaged |3.2.B1b| | 1 |
| Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Brake locking device insecure |3.2.A1e| | 1 |