| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 35 |
| Steering headbearing has excessive free play |2.2.2| | 33 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 26 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 24 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 22 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 18 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 15 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 15 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 14 |
| Registration plate issues | 14 |
| Front Steering headbearing has excessive free play |2.2.2| | 12 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 11 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 9 |
| Stop lamp remains on when the brake is released |1.3.1e| | 9 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 8 |
| Horn not working |1.7.3a| | 8 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 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 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 6 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Headlamp insecure |1.2.3b| | 6 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 6 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 6 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 5 |
| Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 5 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 5 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Front wheel bearings are excessively rough |2.3.5b| | 4 |
| An item not tested |Manual| | 4 |
| Front suspension has inadequate damping effect. |2.3.6c| | 4 |
| Nearside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 4 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Front Headlamp insecure |1.2.3b| | 3 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 3 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 3 |
| Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 3 |
| 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| | 3 |
| Front Direction indicator insecure |1.5.3b| | 3 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 3 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Rear reflector on motorcycle missing |1.4.1| | 3 |
| Handlebar deformed |2.1.1b| | 3 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Position lamp switch insecure |1.1.4b| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 2 |
| Fuel system component leaking |7.2.1a| | 2 |
| Nearside Front Direction indicator insecure |1.5.3b| | 2 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 2 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Front Fairing insecure and likely to impede the steering |2.1.2e| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 2 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear Brake disc|s| excessively pitted |3.2.A1l| | 2 |
| Offside Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Rear Direction indicators not working |1.5.1c| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Indicator tell tale not functioning |1.5.2| | 2 |
| Lower Steering headbearing has excessive free play |2.2.2| | 2 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 2 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 2 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Fairing so located that it is likely to impede the steering |2.1.2e| | 2 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Headlamp switch faulty |1.2.4| | 2 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 2 |
| Nearside Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Rear Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Front Brake disc contaminated |1.1.14 |b|| | 1 |
| Rear Wheel more than one fixing loose |5.2.1 |a| |ii|| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Front Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Rear position lamp missing |1.1.1a| | 1 |
| Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Direction indicator incorrect colour |1.5.1b| | 1 |
| Wheel inadequatly repaired significantly reducing the original strength |4.2.1a| | 1 |
| Rear Brake lever is inoperative |3.1.3c| | 1 |
| Rear Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Front Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Nearside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Front suspension assembly component excessively corroded. |2.3.1| | 1 |
| Offside Front suspension assembly component excessively corroded. |2.3.1| | 1 |
| Front Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Nearside Rear Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Front Lower Horn not working |1.7.3a| | 1 |
| Centre Front Upper Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Nearside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Brake hose leaking fluid |3.2.B4| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Rear wheel insecure |4.2.3b| | 1 |
| Rear Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Rear Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Position lamp switch faulty |1.1.4a| | 1 |
| Front Front position lamp incorrect colour |1.1.2a| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Lower Fairings so located that it is likely to impede the steering |2.1.2e| | 1 |
| Rear Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Centre Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Nearside Front Front suspension assembly component loose |2.3.1| | 1 |
| Offside Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Front Stop lamp switch with a delay in operation |4.3.2 |a| |ii|| | 1 |
| Headlamp switch insecure |1.2.4| | 1 |
| Offside Front Throttle operating incorrectly |6.2.1f| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Stop lamp insecure |1.3.3b| | 1 |
| Front Handlebar deformed |2.1.1b| | 1 |
| Front suspension assembly component excessively bent |2.3.1| | 1 |
| Offside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Headlamp main beam flickers when tapped lightly by hand |1.2.2c| | 1 |
| Brake component is fractured |3.1.5| | 1 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear suspension component excessively bent |2.4.A.1a| | 1 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Indicator switch defective Indicator switch intermittent in both direction selections |1.5.4| | 1 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp Hi/Lo beam selection intermittent, sometimes low beam fails to illuminate. |1.2.2b|i|| | 1 |
| Front position lamp incorrect colour Blue side lights |1.1.2a| | 1 |
| Headlamp aim headlamp deteriorated and function impaired Bulb filaments distorted causing incorrect beam |1.2.3a| | 1 |
| Direction indicators affected by the operation of another lamp Flashing too fast and erratically when either brake light applied |1.5.1c| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Exhaust markings indicating not for road use or similar wording (6.1.2 (c)) | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Nearside Front Front position lamp incorrect colour |1.1.2a| | 1 |
| Offside Front Front position lamp incorrect colour |1.1.2a| | 1 |
| Front Headlamp main beam affected by the operation of the horn |1.2.2c| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Shock absorber has negligible damping effect front forks (5.3.2 (b)) | 1 |
| Front Position lamp missing (4.2.1 (a)) | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Brake pipe likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Centre Front Fairing insecure and likely to impede the steering |2.1.2e| | 1 |
| Front Front suspension assembly component excessively corroded. |2.3.1| | 1 |
| Front Brake hose leaking fluid |3.2.B4| | 1 |
| Front Brake hose which buldges |3.2.B4| | 1 |
| Front Hydraulic brake control creeps under load. |3.1.4a| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Front Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Nearside Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Offside Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Front Front suspension assembly component excessively bent |2.3.1| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Offside Rear Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Rear reflector on motorcycle dirty and function impaired |1.4.2a| | 1 |
| Rear position lamp obscured more than 50% |1.1.1d| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Rear wheel insecure |4.2.3b| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Offside Front Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Exhaust mounting missing |7.1.1c| | 1 |
| Front Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Front Fork yoke deformed |2.1.1b| | 1 |
| Rear Rear suspension component loose |2.4.A.1a| | 1 |
| Front Fairing so located that it is likely to impede the steering |2.1.2e| | 1 |
| Centre Upper Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Vehicle identification number not legible |6.3.5a| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Outer Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Front Upper Fairing insecure and likely to impede the steering |2.1.2e| | 1 |
| Front suspension assembly component loose |2.3.1| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |