| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 37 |
| Registration plate issues | 27 |
| Rear reflector on motorcycle missing |1.4.1| | 22 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 8 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 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| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Drive chain excessively loose |6.2.1d| | 4 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Horn not working |1.7.3a| | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Horn not working (7.7 (a) (ii)) | 3 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride fuel tank insecure |6.2.1h| | 1 |
| Nearside Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Offside Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Offside Front Brake fluid reservoir insecurely mounted |3.2.B1a| | 1 |
| Front Brake lever has abnormal movement of levers indicating excessive wear or maladjustment clamp loose |1.1.15 |f|| | 1 |
| Nearside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Offside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Nearside Wheel spoke missing |4.2.1b| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 1 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front Front position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Nearside Drive chain excessively tight |6.2.1d| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Nearside Front Upper Direction indicator missing |1.5.1a| | 1 |
| Offside Front Upper Direction indicator missing |1.5.1a| | 1 |
| Nearside Rear Upper Direction indicator missing |1.5.1a| | 1 |
| Offside Rear Upper Direction indicator missing |1.5.1a| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Drive chain sprocket so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Fuel hose leaking |7.2.1a| | 1 |
| Chain guard fouling another component |6.2.1c| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Centre Rear Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Offside Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Throttle operating incorrectly hangs up on lock |6.2.1f| | 1 |
| Rear brake binding | 1 |
| Headlamp aim not tested HEADLAMP BULB INCORRECTLY FITTED. BEAM CANNOT BE TESTED |4.1.2 |b|| | 1 |
| Stop lamp does not illuminate immediately a brake applies front switch |1.3.1a| | 1 |
| Offside Rear Wheel spoke missing |4.2.1b| | 1 |
| Stop lamp does not illuminate immediately a brake applies Not working from rear brake. |1.3.1a| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Wheel spoke cracked. |4.2.1b| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Offside Fuel hose leaking |7.2.1a| | 1 |
| Direction indicator missing |1.5.1a| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Rear Direction indicator incorrect colour |4.4.3 |a|| | 1 |
| Rear Direction indicator obviously incorrectly positioned |4.4.3 |a|| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 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 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Shock absorber has a serious fluid leak Both front fork oil seals leaking |5.3.2 |b|| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear suspension has corrosion which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Rear 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 wheel spindle loose |2.4.A.2b| | 1 |
| Centre Rear Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Exhaust markings indicating not for road use or similar wording (6.1.2 (c)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Stop lamp not working front switch not working (4.3.1 (a) (ii)) | 1 |
| Fuel pipe leaking (6.1.3 (b) (i)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Central Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Central Front Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| All direction indicators missing all missing (4.4.1 (a) (ii)) | 1 |
| Rear 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 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Position lamp not working (4.2.1 (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 |
| Shock absorber likely to become detached rear shocker top bolts loose (5.3.2 (a) (ii)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Horn not working (7.7 (a)) | 1 |
| Rear Direction indicator obviously incorrectly positioned to close together (4.4.3 (a)) | 1 |
| Registration plate lamp issues | 1 |
| Rear Brake disc fractured (1.1.14 (a) (ii)) | 1 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 1 |