| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 52 |
| Rear reflector on motorcycle missing |1.4.1| | 24 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 23 |
| Drive chain excessively loose |6.2.1d| | 18 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 16 |
| Registration plate issues | 16 |
| Horn not working |1.7.3a| | 16 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Drive chain excessively tight |6.2.1d| | 14 |
| Handlebar deformed |2.1.1b| | 14 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 13 |
| Drive chain worn to excess |6.2.1e| | 12 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 11 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 11 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 10 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 10 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 10 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 9 |
| Throttle operating incorrectly |6.2.1f| | 9 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 9 |
| Steering headbearing has excessive free play |2.2.2| | 8 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 8 |
| Front Wheel spoke excessively loose |4.2.1b| | 8 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 8 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 8 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 7 |
| Front Steering headbearing has excessive free play |2.2.2| | 7 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Rear Wheel spoke excessively loose |4.2.1b| | 6 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 5 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 5 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 5 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 5 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 5 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 5 |
| Headlamp aim beam image kick up to the offside |1.6| | 5 |
| Rear Brake locking device missing |3.2.A1e| | 5 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 4 |
| 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 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 4 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 4 |
| Nearside Rear Direction indicator not working |1.5.1c| | 4 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 4 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Direction indicators not working |1.5.1c| | 4 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 4 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 4 |
| Brake hose damaged | 3 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 3 |
| Offside Rear Direction indicator not working |1.5.1c| | 3 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 3 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 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 wheel bearings have excessive free play |2.3.5b| | 3 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 3 |
| Brake pedal is positioned so that the brake cannot be readily applied |3.1.3c| | 3 |
| Offside Rear Footrest missing |6.2.1a| | 3 |
| Exhaust excessively deteriorated |7.1.1a| | 3 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 3 |
| Offside Direction indicator not working |1.5.1c| | 3 |
| Offside Steering lock stop missing |2.1.3| | 3 |
| Handlebar mounting excessively deteriorated |flexible type| |2.1.1d| | 3 |
| Rear Footrest missing |6.2.1a| | 3 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Front Wheel spoke missing |4.2.1b| | 2 |
| Brake locking device insecure |3.2.A1e| | 2 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 2 |
| Horn is not continous or uniform |1.7.3c| | 2 |
| Rear position lamp insecure |1.1.1c| | 2 |
| Steering lock stop missing |2.1.3| | 2 |
| Offside Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Nearside Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Offside Front Direction indicators not working |1.5.1c| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Brake locking device missing |3.2.A1e| | 2 |
| Rear Floor brake test indicates a severely juddering brake |3.3C2d.| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Nearside Direction indicator not working |1.5.1c| | 2 |
| Exhaust has part of the system missing |7.1.1a| | 2 |
| Front Front mudguard insecure |2.3.7| | 2 |
| Nearside Wheel alignment incorrect which adversely affects the steering Yokes twisted |2.5.1| | 2 |
| Steering movement excessively `notchy` with the wheel raised Steering hesd bearings |2.2.1b| | 2 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Rear Brake back plate|s| insecure |3.2.A1j| | 2 |
| Rear Drive chain excessively loose |6.2.1d| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 2 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 2 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Headlamp switch insecure |1.2.4| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Offside Rear Footrest insecure |6.2.1a| | 2 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Rear Brake back plate|s| securing bolt|s| missing |3.2.A1j| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Front mudguard insecure |2.3.7| | 2 |
| Front Steering lock stop missing |2.1.3| | 2 |
| Offside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Headlamp insecure (4.1.1 (c)) | 2 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Nearside Direction indicator missing |1.5.1a| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Nearside Rear Drive chain sprocket so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Drive chain excessively tight |6.1.7 |k| |i|| | 1 |
| Nearside Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear Brake pedal not releasing correctly and functionality of brakes affected |1.1.2 |b| |ii|| | 1 |
| Central Front Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front position lamp adversely affected by the operation of the horn |1.1.3b| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Offside Handlebar handgrip missing |2.1.1c| | 1 |
| Nearside Rear Direction indicator missing |1.5.1a| | 1 |
| Rear Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Offside Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Brake linkage excessively corroded |3.2.A1c| | 1 |
| Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Lower Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear position lamp obscured more than 50% |1.1.1d| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Front Brake master cylinder severely damaged |3.2.B1b| | 1 |
| Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Front Hydraulic brake control creeps under load. |3.1.4a| | 1 |
| Brake component is severely distorted |3.1.5| | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Rear Brake pedal insecure |3.1.2a| | 1 |
| Nearside Front Handlebar deformed |2.1.1b| | 1 |
| Nearside Rear Drive chain excessively tight |6.2.1d| | 1 |
| Stop lamp affected by the operation of the horn |1.3.2| | 1 |
| Indicator tell tale not operating correctly |1.5.2| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Front Exhaust excessively deteriorated |7.1.1a| | 1 |
| Nearside Handlebar deformed |2.1.1b| | 1 |
| Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Brake linkage clevis joint excessively worn |3.2.A1d| | 1 |
| Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Headlamp aim not tested not working on dip beam |1.6| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Centre Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Offside Rear Brake pedal is inoperative |3.1.3c| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Rear Rear suspension component loose |2.4.A.1a| | 1 |
| Rear Wheel spoke cracked. |4.2.1b| | 1 |
| Nearside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Centre Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front position lamp damaged and function impaired |1.1.1b| | 1 |
| Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Front position lamp missing |1.1.1a| | 1 |
| Nearside Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Offside Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Brake hose excessively deteriorated | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Rear Wheel spoke missing |4.2.1b| | 1 |
| Offside Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Headlamp aim beam image too far to the right |1.6.4| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Nearside Front Footrest missing |6.2.1a| | 1 |
| Rear Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Rear Brake locking device insecure |3.2.A1e| | 1 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| All position lamps adversely affected by the operation of the horn |1.1.3b| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Front Fork yoke fractured steering stop fractured |2.2.2 |d| |i|| | 1 |
| Outer Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Headlamp switch insecure |1.2.4| | 1 |
| Headlamp dipped beam flickers when tapped lightly by hand |1.2.2c| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Front Brake pipe inadequately supported |3.2.B2b| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Direction indicator missing |1.5.1a| | 1 |
| Front suspension assembly component loose |2.3.1| | 1 |
| Nearside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Front Brake pipe union leaking fluid |3.2.B4| | 1 |
| Brake reaction bracket insecure |3.2.A1j| | 1 |
| Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Horn missing |1.7.1| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Centre Steering lock stop missing |2.1.3| | 1 |
| Rear position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Nearside Direction indicator incorrect colour |1.5.1b| | 1 |
| Nearside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Offside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Nearside Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Seat insecure |6.2.1a| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Front mudguard insecure corroded |2.3.7| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Front Direction indicator missing |1.5.1a| | 1 |
| Upper Fuel cap sealing washer missing |7.2.2c| | 1 |
| Lower 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 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Front Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 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 |
| Offside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Front Headlamp aim not tested |1.6| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Fuel cap sealing washer missing |7.2.2c| | 1 |
| Centre Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride Securing nut for front brake lever pivot pin |6.2.1h| | 1 |
| Throttle operating incorrectly |6.2.7 |a| |i|| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected Revving up engine when turning lock to lock (6.2.7 (a) (ii)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 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 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Stop lamp not working when operated from front brake (4.3.1 (a) (ii)) | 1 |
| Stop lamp not working when operated from rear brake (4.3.1 (a) (ii)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Steering operation fouling on the fuel tank or bodywork on full lock when turned full lock to right (2.1.4 (b)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected Throttle cable stretched when steering turned full lock to left (6.2.7 (a) (ii)) | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected Hand grip insecure (6.2.7 (a) (ii)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Position lamp showing white light to the rear (4.2.3 (a) (ii)) | 1 |
| Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Stop lamp not working when using front brake control (4.3.1 (a) (ii)) | 1 |