| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 24 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 18 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 16 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 15 |
| Steering headbearing has excessive free play |2.2.2| | 14 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 11 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 9 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 9 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 8 |
| Nearside Rear Direction indicator not working |1.5.1c| | 7 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 5 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 5 |
| Registration plate issues | 5 |
| Nearside Rear Direction indicators not working |1.5.1c| | 4 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 4 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 4 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Nearside Front Direction indicator not working |1.5.1c| | 3 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 3 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Rear reflector on motorcycle missing |1.4.1| | 3 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 3 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Nearside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 2 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 2 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 2 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Front Handlebar mounting clamp bolt loose |2.1.1a| | 2 |
| Offside Direction indicator not working |1.5.1c| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Nearside Steering lock stop ineffective |2.1.3| | 2 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Nearside Rear Brake lever has inadequate reserve travel |3.1.3b| | 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 |
| Horn not working |1.7.3a| | 2 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Motorcycle structure adversely modified |6.1.1b| | 1 |
| Brake component damaged and seriously reduced in strength |3.2.A1| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| All direction indicators not working NOT FLASHING WHEN HEADLAMP CIRCUIT AND BRAKE LIGHT ON |4.4.1 |a| |ii|| | 1 |
| Headlamp light intensity severely reduced WHEN BRAKE LIGHT AND INDICATORS ON |4.1.4 |a|| | 1 |
| Direction indicator affected by the operation of another lamp All lamps not functioning unless engine speed high, and killed by brake lamp application. |1.5.1c| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Exhaust has part of the system missing |7.1.1a| | 1 |
| Rear Brake lever is inoperative |3.1.3c| | 1 |
| Rear Brake pipe likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear Brake cable has a significantly damaged outer casing. |3.2.A1b| | 1 |
| Centre Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Offside Front Handlebar handgrip missing |2.1.1c| | 1 |
| Nearside Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Front Throttle operating incorrectly |6.2.1f| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Stop lamp missing |1.3.3a| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Nearside Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Brake hose excessively deteriorated | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Rear Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front Brake hose fouling |3.2.B3b| | 1 |
| Offside Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Nearside Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Offside Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Centre Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Rear Direction indicator missing |1.5.1a| | 1 |
| Brake pipe excessively corroded | 1 |
| Rear Brake disc|s| excessively pitted |3.2.A1l| | 1 |
| Rear Brake disc|s| cracked |3.2.A1g| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Floor brake test Neither brake control achieves an efficiency of 25% |3.3.C1b| | 1 |
| Centre Front Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Centre Front Lower Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Exhaust system insecure |6.1.2 |a|| | 1 |
| Front Fairing insecure and likely to impede the steering |2.1.2e| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Handlebar mounting insecure |2.2.1 |a| |i|| | 1 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Offside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Centre Rear Upper Direction indicators not working |1.5.1c| | 1 |
| Nearside Rear Upper Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front Exhaust mounting missing |7.1.1c| | 1 |
| Front All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Front Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Rear Rear wheel insecure |4.2.3b| | 1 |
| Nearside Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Rear Fuel pipe leaking |7.2.1a| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Headlamp dipped beam flickers when tapped lightly by hand |1.2.2c| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Centre Front Upper Steering lock stop ineffective |2.1.3| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Stop lamp does not illuminate immediately a brake applies FRONT BRAKE LEVER |1.3.1a| | 1 |
| Front Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Rear Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Rear Rear wheel bearings are excessively tight |2.4.A.2c| | 1 |
| Centre Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 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 |
| Indicator switch defective |1.5.4| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Suspension component attachment bracket/mounting corroded and seriously weakened (5.3.3 (b) (i)) | 1 |