| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 52 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 31 |
| Registration plate issues | 23 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 17 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 17 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 15 |
| Riders seat insecure |6.2.1a| | 15 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 12 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 12 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 8 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 7 |
| Front suspension has inadequate damping effect. |2.3.6c| | 7 |
| Headlamp aim not tested |1.6| | 6 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 6 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 6 |
| Stop lamp remains on when the brake is released |1.3.1e| | 5 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 5 |
| Steering headbearing has excessive free play |2.2.2| | 5 |
| Nearside Front Direction indicator not working |1.5.1c| | 4 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Direction indicators not working |1.5.1c| | 4 |
| Offside Front Direction indicator not working |1.5.1c| | 4 |
| Offside Rear Direction indicator not working |1.5.1c| | 4 |
| Registration plate lamp issues | 4 |
| Headlamp switch faulty |1.2.4| | 4 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 4 |
| Horn not working |1.7.3a| | 4 |
| Nearside Indicator tell tale not functioning |1.5.2| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Rear reflector on motorcycle missing |1.4.1| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Exhaust excessively deteriorated |7.1.1a| | 3 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 3 |
| Nearside Direction indicator not working |1.5.1c| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Indicator switch defective |1.5.4| | 3 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Horn control defective |1.7.2a| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 2 |
| Riders seat insecure |6.2.5 |a| |ii|| | 2 |
| Brake pedal cannot be released smoothly |3.1.3d| | 2 |
| An item not tested |Manual| | 2 |
| Brake hose damaged | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 2 |
| Front Brake lever cannot be released smoothly |3.1.3d| | 2 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 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 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 2 |
| Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 2 |
| Front Brake lever insecure |3.1.2a| | 2 |
| Front Position lamp not working (4.2.1 (a)) | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 2 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Centre Lower Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Front Brake disc|s| excessively pitted |3.2.A1l| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Headlamp damaged and function impaired |1.2.3a| | 1 |
| Front Brake component defective due to a deliberate modification which significantly reduces the original strength |3.1.5| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Brake pedal attachment screws missing. |3.1.2b| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear position lamp obscured more than 50% |1.1.1d| | 1 |
| Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Brake component has an inadequate repair |3.1.5| | 1 |
| Stop lamp light intensity significantly reduced |4.3.3 |a| |ii|| | 1 |
| Horn sound not in accordance with requirements |7.7 |c|| | 1 |
| Central Front Upper Front position lamp incorrect colour |1.1.2a| | 1 |
| Central Rear Lower Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Rear wheel insecure |4.2.3b| | 1 |
| Rear Brake cable badly frayed |3.2.A1b| | 1 |
| Centre Front Riders seat insecure |6.2.1a| | 1 |
| Offside Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Riders seat insecure |6.2.1a| | 1 |
| Offside Steering lock stop missing |2.1.3| | 1 |
| Offside 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 |
| Upper Throttle operating incorrectly |6.2.1f| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Nearside Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Front Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Front wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Vehicle identification number not legible |6.3.5a| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Front Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Front Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Front suspension fouling which affects the movement of the front suspension. |2.3.6a| | 1 |
| Motorcycle structure excessively corroded under body |6.1.1a| | 1 |
| Front Headlamp aim not tested |4.1.2 |b|| | 1 |
| Rear Exhaust excessively deteriorated |7.1.1a| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Fuel cap sealing washer torn |7.2.2c| | 1 |
| Rear Fuel cap does not fasten securely by a positive means |7.2.2b| | 1 |
| Rear Riders seat insecure |6.2.1a| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Rear Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Front mudguard insecure |2.3.7| | 1 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Rear Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Offside Rear All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Direction indicators not working Offside rear |1.5.1c| | 1 |
| Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Drive belt excessively tight |6.2.1d| | 1 |
| Front Upper Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Centre Rear Lower Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Stop lamp does not illuminate immediately a brake applies rear brake lever |1.3.1a| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Exhaust silencer insecure |8.1.1 |b| |i|| | 1 |
| Offside Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Front position lamp missing |1.1.1a| | 1 |
| Front Brake master cylinder has a seized master cylinder pivot. |3.2.B5| | 1 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Front Steering control handlebar movement restricted by cables caught on a projection |2.1.2c| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Brake lever insecure |3.1.2a| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Lower Front suspension assembly component loose |2.3.1| | 1 |
| Riders seat missing |6.2.1a| | 1 |
| Front Brake hose leaking fluid |3.2.B4| | 1 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Fuel cap sealing washer missing |7.2.2c| | 1 |
| Exhaust system insecure |6.1.2 |a|| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Centre Rear Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Rear Exhaust mounting missing |7.1.1c| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Offside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Rear All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Central Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Nearside Rear Direction indicators not working (1.5.1c) | 1 |
| Offside Direction indicators not working (1.5.1c) | 1 |
| Offside Rear Direction indicator incorrect colour (1.5.1b) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Position lamp not working (4.2.1 (a)) | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Rear Wheel spindle or securing nut(s) so insecure that wheel security or steering control is adversely affected (5.2.1 (c) (ii)) | 1 |
| Rear Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Nearside Rear Direction indicator missing (4.4.1 (a) (ii)) | 1 |
| Offside Rear Direction indicator missing (4.4.1 (a) (ii)) | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls Not illuminating from front brake control. (4.3.2 (a) (iii)) | 1 |
| Central Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Front Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 1 |
| Nearside Front All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Central Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Nearside Brake lever insecure (1.1.2 (e) (i)) | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Front Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |