| Most common failures | No# failures |
|---|
| Registration plate issues | 96 |
| Rear reflector on motorcycle missing |1.4.1| | 72 |
| Headlamp aim out of alignment | 35 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 30 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 24 |
| Horn not working |1.7.3a| | 23 |
| Horn missing |1.7.1| | 18 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 17 |
| Rear reflector missing (4.8.2 (a) (ii)) | 14 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Horn not working |7.7 |a| |ii|| | 13 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 10 |
| Registration plate lamp issues | 8 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 8 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 7 |
| Front wheel bearings have excessive free play |2.3.5b| | 7 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Horn not working (7.7 (a) (ii)) | 6 |
| Rear reflector missing |4.8.2 |a| |ii|| | 6 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 5 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 5 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Rear Wheel spoke excessively loose |4.2.1b| | 4 |
| Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 4 |
| Rear Position lamp not working (4.2.1 (a)) | 4 |
| Rear Position lamp not working |4.2.1 |a|| | 3 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Headlamp aim not tested |1.6| | 3 |
| Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 3 |
| Front Stop lamp missing |1.3.3a| | 3 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 3 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Front Horn not working |1.7.3a| | 2 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Rear Stop lamp missing |1.3.3a| | 2 |
| Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Rear Brake disc|s| is excessively distorted |3.2.A1m| | 2 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 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 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Direction indicator missing |1.5.1a| | 2 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 2 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Horn not working (1.7.3a) | 1 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Offside Front Brake pipe union leaking fluid Brake master cylinder |3.2.B4| | 1 |
| Horn control defective horn control missing |1.7.2a| | 1 |
| Headlamp at least one does not illuminate on main beam dip or main beam inop no switch fitted |1.2.2a|ii|| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies with hand or foot brake levers |1.3.1a| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Brake lever has abnormal movement of levers indicating excessive wear or maladjustment Rear brake lever bent in. (1.1.15 (f)) | 1 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Horn not working loose wire (7.7 (a)) | 1 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Central Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Stop lamp does not illuminate immediately a brake applies front lever |1.3.1a| | 1 |
| Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Rear Wheel spoke excessively loose (5.2.2 (d)) | 1 |
| Front Stop lamp does not illuminate immediately a brake applies front brake switch |1.3.1a| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Rear Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Nearside Horn missing |1.7.1| | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Stop lamp not working Front brake (4.3.1 (a) (ii)) | 1 |
| Stop lamp not working Rear brake (4.3.1 (a) (ii)) | 1 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Front Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Fuel system component leaking (6.1.3 (b) (i)) | 1 |
| Rear reflector on motorcycle missing replaced the missing reflector |1.4.1| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Shock absorber has a serious fluid leak both front forks leaking (5.3.2 (b)) | 1 |
| Nearside Rear Direction indicator missing |1.5.1a| | 1 |
| Offside Rear Direction indicator missing |1.5.1a| | 1 |
| Dipswitch does not operate immediately when selected on main beam (4.1.3 (b)) | 1 |
| Direction indicator missing all four (4.4.1 (a) (ii)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| All direction indicators missing (4.4.1 (a) (ii)) | 1 |
| All direction indicators missing All flashers missing |4.4.1 |a| |ii|| | 1 |
| Offside Rear Upper Exhaust system insecure Exhaust silencer bolt missing |6.1.2 |a|| | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Front Brake disc significantly and obviously worn |1.1.14 |a| |i|| | 1 |
| Rear Brake disc significantly and obviously worn |1.1.14 |a| |i|| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Brake pedal insecure |3.1.2a| | 1 |
| Rear Brake hose leaking fluid |3.2.B4| | 1 |
| Offside Rear Lower Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Offside Rear Lower Brake disc|s| cracked |3.2.A1g| | 1 |
| Offside Front Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Front Upper Stop lamp missing |4.3.1 |a| |ii|| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Suspension component pin or bush excessively worn |5.3.4 |a| |i|| | 1 |
| Stop lamp missing |4.3.1 |a| |ii|| | 1 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 1 |
| Dipswitch does not operate immediately when selected on dipped beam |4.1.3 |b|| | 1 |
| Position lamp showing white light to the rear |4.2.3 |a| |ii|| | 1 |
| Headlamp main beam affected by the operation of another lamp both filaments on causing light to be dull |1.2.2c| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear Direction indicator missing |1.5.1a| | 1 |
| Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Wheel spoke missing |4.2.1b| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Stop lamp light intensity significantly reduced (4.3.3 (a) (ii)) | 1 |
| Rear Position lamp light intensity significantly reduced (4.2.3 (a) (ii)) | 1 |
| Headlamp not working on dipped beam light goes out on right-hand lock (4.1.1 (a) (ii)) | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Front Horn not working (7.7 (a)) | 1 |
| Offside Rear Direction indicator insecure nut loose |1.5.3b| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Position lamp not working (4.2.1 (a)) | 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 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Wheel bearing so rough it is likely to overheat or break up unable to spin rear wheel (5.1.3 (b) (ii)) | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Brake performance not tested due to rear bearing (1.2.1 (g)) | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Position lamp switch insecure |1.1.4b| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Brake pedal insecure rear brake pedal pivot bolt split pin missing (1.1.2 (e) (i)) | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Rear Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Direction indicator lens defective such that the emitted light is adversely affected No lense fitted PRS |4.4.1 |b| |ii|| | 1 |
| Handlebar grip insecure to handlebar Left hand grip loose |2.2.1 |d| |ii|| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Wheel bearing play so excessive that directional control is impaired (5.1.3 (a) (ii)) | 1 |
| Rear Rear position lamp incorrect colour |1.1.2b| | 1 |
| Exhaust is leaking and excessively noisey needs rechecking |7.1.1b| | 1 |