| Most common failures | No# failures |
|---|
| Registration plate issues | 81 |
| Rear reflector on motorcycle missing |1.4.1| | 58 |
| Horn not working |1.7.3a| | 22 |
| Front wheel bearings have excessive free play |2.3.5b| | 19 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 17 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 16 |
| Horn missing |1.7.1| | 15 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 15 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 14 |
| Headlamp aim out of alignment | 14 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Front wheel bearings are excessively rough |2.3.5b| | 10 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 9 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 8 |
| Rear reflector missing (4.8.2 (a) (ii)) | 7 |
| Rear Wheel spoke excessively loose |4.2.1b| | 7 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 6 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 6 |
| Front Stop lamp missing |1.3.3a| | 5 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 5 |
| 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| | 5 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Drive chain excessively loose |6.2.1d| | 4 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 3 |
| Registration plate lamp issues | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear position lamp incorrect colour |1.1.2b| | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Rear position lamp deteriorated and function impaired |1.1.1b| | 2 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Stop lamp missing |1.3.3a| | 2 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Brake disc|s| securing bolt|s| missing |3.2.A1g| | 1 |
| Rear Brake disc|s| securing bolt|s| missing |3.2.A1g| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Rear Suspension component pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Rear Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Front Brake disc insecure |1.1.14 |a| |ii|| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 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 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Nearside Steering lock stop loose |2.1.3| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Rear Stop lamp missing |1.3.3a| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Nearside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Upper Direction indicator missing |1.5.1a| | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Fuel system component leaking carburetor leaking fuel |7.2.1a| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Horn not working (7.7 (a)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Rear Wheel spoke excessively loose More than one. (5.2.2 (d)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Brake pedal insecure |3.1.2a| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Rear suspension bearing has excessive free play swinging arm |2.4.A2a|i|| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Footrest insecure split pin missing |6.2.1a| | 1 |
| Nearside Lower Front suspension assembly component missing pinch bolts |2.3.1| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride chain link circlip insecure |6.2.1h| | 1 |
| Rear Brake component has an inadequate repair inner pad heat shield insecure |3.1.5| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Centre Front Horn missing |1.7.1| | 1 |
| Offside Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Stop lamp does not illuminate immediately a brake applies by front lever |1.3.1a| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Direction indicator flashing more than 120 times per minute All |1.5.1c| | 1 |
| Chain guard insecure (6.1.7 (i)) | 1 |
| Horn control not readily accesible. |1.7.2a| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Rear wheel spindle loose |2.4.A.2b| | 1 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| All position lamps not working |4.2.1 |a|| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Brake disc significantly and obviously worn |1.1.14 |a| |i|| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Rear Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Fuel hose leaking |7.2.1a| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Headlamp aim not tested main beam unavailable so headlight hasnt been tested. (4.1.2 (b)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Nearside Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Fuel system component leaking fuel tap |7.2.1a| | 1 |
| Stop lamp does not illuminate immediately a brake applies front control |1.3.1a| | 1 |
| Offside Rear Wheel spoke missing |4.2.1b| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Front Horn missing |1.7.1| | 1 |
| Rear Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Rear Rear position lamp missing |1.1.1a| | 1 |
| Centre Front Horn not working |1.7.3a| | 1 |
| Centre Front Front position lamp insecure |1.1.1c| | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Offside Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Fuel system component leaking Carb overflow |6.1.3 |b| |i|| | 1 |
| Front Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| All position lamps not working (4.2.1 (a)) | 1 |
| Headlamp aim not tested due to headlamp inoperative (4.1.2 (b)) | 1 |
| Position lamp not working |4.2.1 |a|| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Position lamp not working (4.2.1 (a)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |