| Most common failures | No# failures |
|---|
| Registration plate issues | 110 |
| Rear reflector on motorcycle missing |1.4.1| | 65 |
| Headlamp aim out of alignment | 26 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 25 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 22 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 20 |
| Horn not working |1.7.3a| | 17 |
| Front wheel bearings have excessive free play |2.3.5b| | 17 |
| Horn missing |1.7.1| | 15 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 14 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 13 |
| Rear Wheel spoke excessively loose |4.2.1b| | 12 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 12 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 11 |
| Front wheel bearings are excessively rough |2.3.5b| | 8 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Rear reflector missing (4.8.2 (a) (ii)) | 7 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 7 |
| Registration plate lamp issues | 7 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| 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| | 6 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 6 |
| Steering headbearing has excessive free play |2.2.2| | 6 |
| Front Horn not working |1.7.3a| | 6 |
| Drive chain excessively loose |6.2.1d| | 5 |
| Rear reflector on sidecar missing |1.4.1| | 3 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Rear Drive chain worn to excess |6.2.1e| | 3 |
| Rear Direction indicator missing |1.5.1a| | 3 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Front Wheel spoke excessively loose |4.2.1b| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 3 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 3 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Front Stop lamp missing |1.3.3a| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Front Horn not working (7.7 (a) (ii)) | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Rear Wheel spoke excessively loose (5.2.2 (d)) | 2 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear reflector on motorcycle missing (1.4.1) | 2 |
| Headlamp at least one does not illuminate on main beam (1.2.2a(ii)) | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 2 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 2 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 2 |
| Central Front Upper Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Nearside Front Lower Chain guard insecure |6.2.1c| | 1 |
| Central Rear Upper All position lamps not working |4.2.1 |a|| | 1 |
| Central Rear Lower Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Central Rear Upper Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Central Front Upper Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Headlamp missing |1.2.3a| | 1 |
| Rear Brake disc|s| securing bolt|s| loose |3.2.A1g| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Motorcycle structure excessively distorted |6.1.1a| | 1 |
| Indicator switch does not operate the direction indicators on the side selected |1.5.4| | 1 |
| Nearside Rear Wheel spoke excessively loose 3 spokes |4.2.1b| | 1 |
| Rear Brake disc|s| securing bolt|s| missing |3.2.A1g| | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Central Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Horn control not readily accesible. |1.7.2a| | 1 |
| Stop lamp does not illuminate immediately a brake applies front control lever |1.3.1a| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Lower Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Headlamp light intensity severely reduced (4.1.4 (a)) | 1 |
| Front Stop lamp not working no switch (4.3.1 (a) (ii)) | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Offside Front Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Drive chain sprocket excessively loose |6.1.7 |c| |i|| | 1 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 1 |
| Front Brake disc contaminated |1.1.14 |b|| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride chain |6.2.1h| | 1 |
| Front All position lamps light intensity significantly reduced INCORRECT COLOUR |4.2.3 |a| |ii|| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Riders seat insecure |6.2.5 |a| |ii|| | 1 |
| Offside Rear Motorcycle structure joining/attachment plate or fastening so insecure that structural rigidity is seriously reduced REAR SEAT SUPPORT FRAME BOLT SNAPPED |6.1.1 |b| |ii|| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Rear Brake linkage clevis joint excessively worn |3.2.A1d| | 1 |
| Front shock absorber seal failed and leaking oil both |2.3.3| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Rear Motorcycle structure joining/attachment plate or fastening insecure FENDER |6.1.1 |b| |i|| | 1 |
| Front Suspension component mounting modified so the suspension is inoperative (5.3.3 (c) (ii)) | 1 |
| Front All direction indicators missing (4.4.1 (a) (ii)) | 1 |
| Rear All direction indicators missing (4.4.1 (a) (ii)) | 1 |
| Headlamp aim headlamp deteriorated and function impaired (1.2.3a) | 1 |
| 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 |
| Headlamp aim not tested (1.6) | 1 |
| Rear reflector on motorcycle incorrectly positioned (1.4.2d) | 1 |
| Front shock absorber seal failed and leaking oil (2.3.3) | 1 |
| Exhaust has part of the system missing (7.1.1a) | 1 |
| Direction indicator missing (1.5.1a) | 1 |
| Front wheel bearings have excessive free play (2.3.5b) | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Horn not working (7.7 (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 |
| Outer Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Wheel spoke excessively loose x2 |5.2.2 |d|| | 1 |
| Position lamp switch does not operate in accordance with the requirements |4.2.2 |a|| | 1 |
| Headlamp at least one does not illuminate on dipped beam (1.2.2a(i)) | 1 |
| Rear shock absorber has inadequate damping effect. (2.4.A.3b) | 1 |
| Rear suspension movement is excessively stiff (2.4.A.3b) | 1 |
| Horn missing (1.7.1) | 1 |
| Front Stop lamp missing (1.3.3a) | 1 |
| Front position lamp flickers when tapped lightly by hand |1.1.3c| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Nearside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Suspension arm pin or bush excessively worn |5.3.4 |a| |i|| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Nearside Rear Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Lower Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Nearside Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Front Headlamp missing |1.2.3a| | 1 |
| Front Brake caliper insecurely mounted and braking performance affected |1.1.16 |c| |ii|| | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Stop lamp missing |1.3.3a| | 1 |
| Front Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Centre Front Horn control not readily accesible. |1.7.2a| | 1 |
| Stop lamp does not illuminate immediately a brake applies front control |1.3.1a| | 1 |
| Nearside Front shock absorber seal failed and leaking oil fork |2.3.3| | 1 |
| Offside Front shock absorber seal failed and leaking oil fork |2.3.3| | 1 |
| Rear wheel has a loose wheel bolt|s| |4.2.3a| | 1 |
| Front Brake caliper|s| insecure |3.2.A1j| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Nearside Front Horn not working |1.7.3a| | 1 |
| Front Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Centre Front Horn missing |1.7.1| | 1 |
| Front Wheel more than one fixing loose (5.2.1 (a) (ii)) | 1 |
| Horn control defective |1.7.2a| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear Rear suspension component seized |2.4A2a|ii|| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Horn is not a constant note |1.7.3c| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Nearside Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Direction indicator obviously incorrectly positioned Positioned too close together (4.4.3 (a)) | 1 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |
| Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Front Brake lever has insufficient reserve travel |1.1.2 |a|| | 1 |
| Rear Suspension component pin or bush excessively worn Swinging arm bushes / bearings worn |5.3.4 |a| |i|| | 1 |
| Centre Front Front position lamp damaged and function impaired |1.1.1b| | 1 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear mono-shock pivot seized |2.4.B.4| | 1 |