| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 19 |
| Horn not working |1.7.3a| | 7 |
| Registration plate issues | 7 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Front wheel bearings are excessively rough |2.3.5b| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 3 |
| Rear reflector on motorcycle missing |1.4.1| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Rear parking brake recording little or no effort | 3 |
| Parking brake lever has no reserve travel |3.1.6b| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Registration plate lamp issues | 3 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 3 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Horn not working |1.6.2a| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear suspension has corrosion which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Fuel system component leaking |7.2.1a| | 2 |
| Nearside Rear reflector missing |1.5.1a| | 2 |
| Rear 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 |
| Riders seat insecure |6.2.1a| | 2 |
| Nearside Rear Footrest insecure |6.2.1a| | 2 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 2 |
| Front wheel spindle loose |2.3.5a| | 2 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear Brake excessively binding (1.2.1 (f)) | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Throttle operating incorrectly |6.2.1f| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Nearside rear brake recording little or no effort |3.7.B.5a| | 1 |
| Nearside Trikes, quads or pre-68 vehicles, service brake efficiency below requirements |3.7.B.7| | 1 |
| Parking brake efficiency below requirements |3.7.B.7| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Direction indicator obviously incorrectly positioned |4.4.3 |a|| | 1 |
| Front Brake lever has insufficient reserve travel |1.1.2 |a|| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear reflector on sidecar missing |1.4.1| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Brake hose damaged | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Rear reflector missing |1.5.1a| | 1 |
| Offside Rear position lamp|s| insecure |1.1.A.3a| | 1 |
| Nearside Rear Suspension arm locating pin insecure |2.4.G.3a| | 1 |
| Centre Front Front position lamp|s| not working |1.1.A.3b| | 1 |
| Centre Rear Stop lamp not working |1.2.1b| | 1 |
| Exhaust noise is clearly in excess of that emitted by a similar vehicle fitted with a standard silencer in average condition |7.1.4| | 1 |
| Parking brake efficiency below requirements |3.7.C.1b| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Headlamp switch insecure |1.2.4| | 1 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Footrest insecure |6.2.1a| | 1 |
| Offside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside All position lamps not working |1.1.A.3b| | 1 |
| Front Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 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 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Nearside Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Nearside Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Gradient brake test indicates a binding brake |3.3.D1c| | 1 |
| Parking brake: efficiency below requirements |3.7.C.1b| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Offside Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Front Stop lamp not working reconnected terminal |4.3.1 |a| |ii|| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Indicator switch does not operate the direction indicators on the side selected |1.5.4| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Offside Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Front Hydraulic brake control feels spongy lever pulls back to bars |3.1.4a| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Nearside Front Upper Headlamp insecure |1.2.3b| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Brake pedal insecure |3.1.2a| | 1 |
| Handlebar so insecure it is likely to become detached (2.2.1 (b) (ii)) | 1 |
| Handlebar mounting so insecure that steering is adversely affected (2.2.1 (a) (ii)) | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Front Wheel bearing play so excessive that directional control is impaired (5.1.3 (a) (ii)) | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Brake cylinder inadequately mounted (1.1.16 (c) (i)) | 1 |
| Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Wheel bearing rough when rotated sidecar (5.1.3 (b) (i)) | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Position lamp not working (4.2.1 (a)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |