| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 22 |
| Rear reflector on motorcycle missing |1.4.1| | 16 |
| Horn not working |1.7.3a| | 13 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 7 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 7 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Drive chain worn to excess |6.2.1e| | 6 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 5 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Drive chain excessively loose |6.2.1d| | 5 |
| Steering headbearing has excessive free play |2.2.2| | 5 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Direction indicators not working |1.5.1c| | 4 |
| Offside Rear Direction indicator not working |1.5.1c| | 4 |
| Registration plate issues | 4 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 3 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 3 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 3 |
| Rear reflector on motorcycle obscured |1.4.1| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Rear Drive chain excessively loose |6.2.1d| | 2 |
| Drive chain excessively tight |6.2.1d| | 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 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Front suspension assembly component loose |2.3.1| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Wheel spoke excessively bent |4.2.1b| | 2 |
| Front Wheel spoke missing |4.2.1b| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Exhaust mounting missing |7.1.1c| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Rear Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |
| Headlamp aim not tested |4.1.2 |b|| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Handlebar so insecure it is likely to become detached (2.2.1 (b) (ii)) | 1 |
| Steering headbearing has excessive wear or free play steering stem nut loose. (2.2.2 (f) (i)) | 1 |
| Brake lever insecure brake lever broken and repaired with electrical tape. (1.1.2 (e) (i)) | 1 |
| Suspension arm attachment bracket/mounting insecure swingarm axel nut loose. (5.3.3 (a) (i)) | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Headlamp light source and lamp not compatible incorrect bulb for headlamp possibly bonded in. (4.1.4 (c)) | 1 |
| Suspension arm pin or bush likely to become detached swingarm axel nut loose. (5.3.4 (a) (ii)) | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 1 |
| Registration plate lamp issues | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Brake lever is inoperative |3.1.3c| | 1 |
| Rear Brake fluid reservoir insecurely mounted |3.2.B1a| | 1 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Centre Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Horn not working loose wiring (7.7 (a)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Fuel cap sealing washer missing |7.2.2c| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Rear Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Rear suspension component seized |2.4A2a|ii|| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Front Front mudguard insecure |2.3.7| | 1 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies Brake lever |1.3.1a| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies foot brake |1.3.1a| | 1 |
| Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Rear Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride Chain joining clip on with open end face the direction of travel. |6.2.1h| | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear mono-shock insecure |2.4.B.4| | 1 |
| Front Direction indicator missing (4.4.1 (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 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Front Brake lever pivots excessively worn |3.1.3a| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Front Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Front Brake disc|s| securing bolt|s| missing |3.2.A1g| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Brake lever pivots excessively worn |3.1.3a| | 1 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Nearside Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Offside Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Nearside Leg shield insecure and likely to impede the steering |2.1.2e| | 1 |
| Offside Leg shield insecure and likely to impede the steering |2.1.2e| | 1 |