| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 62 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 12 |
| Registration plate issues | 12 |
| Drive chain excessively loose |6.2.1d| | 11 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 10 |
| Horn not working |1.7.3a| | 7 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 7 |
| Registration plate lamp issues | 7 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Front Brake disc|s| cracked |3.2.A1g| | 5 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear reflector on motorcycle missing |1.4.1| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 4 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 4 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Rear Brake disc|s| cracked |3.2.A1g| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Rear Brake excessively binding (1.2.1 (f)) | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Handlebar mounting clamp loose |2.1.1a| | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 2 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Rear position lamp damaged and function impaired |1.1.1b| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Rear Wheel spoke cracked. |4.2.1b| | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Drive chain horseshoe locking device likely to become detached (6.1.7 (j) (ii)) | 1 |
| Rear Brake locking device insecure |3.2.A1e| | 1 |
| Nearside Throttle operating incorrectly Throttle sticking on left lock (6.2.7 (a) (i)) | 1 |
| Fuel system component leaking fuel tap |7.2.1a| | 1 |
| Central Front Headlamp light source and lamp not compatible (4.1.4 (c)) | 1 |
| Rear suspension component misaligned |2.4.A.1a| | 1 |
| Rear suspension has a fracture of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Front position lamp insecure headlamp insecure |1.1.1c| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear reflector on motorcycle missing (1.4.1) | 1 |
| Exhaust markings indicating not for road use or similar wording (7.1.4) | 1 |
| Central Rear Lower Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Rear Drive chain worn to excess |6.2.1e| | 1 |
| Central Front Lower Brake disc significantly and obviously worn should be 4.50 is 4.22 (1.1.14 (a) (i)) | 1 |
| Central Rear Lower Brake disc significantly and obviously worn should be 5.50 is 4.81 (1.1.14 (a) (i)) | 1 |
| Central Rear Lower Brake excessively binding (1.2.1 (f)) | 1 |
| 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| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Nearside Drive chain excessively loose |6.2.1d| | 1 |
| Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Rear Road spring fractured Rear shock (5.3.1 (b) (i)) | 1 |
| Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Exhaust excessively deteriorated |7.1.1a| | 1 |
| Offside Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Rear Brake pipe union leaking fluid |3.2.B4| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Nearside Fuel system component leaking Fuel leaking from carburettor |7.2.1a| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Front Brake effort inadequate at a wheel |1.2.1 |a| |i|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Offside Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Front Roller brake test indicates a binding brake 20 KG FORCE |3.3.A1a| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Rear Lower Rear mono-shock pivot excessively worn LOWER SHOCKER BUSH WORN |2.4.B.4| | 1 |
| Rear Brake excessively binding suspect master cylinder part seized. |1.2.1 |f|| | 1 |
| Nearside Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Brake cylinder insecurely mounted |3.2.B1a| | 1 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Front An item not tested |Manual| | 1 |
| Rear Brake pipe union leaking fluid |3.2.B4| | 1 |
| Front Brake lever is positioned so that the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Rear Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Front Brake disc fractured (1.1.14 (a) (ii)) | 1 |
| Brake hose excessively deteriorated | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Brake component is fractured |3.1.5| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Offside Rear Brake disc|s| cracked |3.2.A1g| | 1 |
| Rear Roller brake test indicates a sticking brake Caliper seals deformed causing piston to stick. |3.3.A1a| | 1 |
| Central Front Upper Position lamp not working (4.2.1 (a)) | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Front wheel spindle loose |2.3.3a| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Nearside 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| | 1 |
| Offside 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| | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Stop lamp missing lense fell off during test (4.3.1 (a) (ii)) | 1 |
| All position lamps not working (4.2.1 (a)) | 1 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Central Headlamp insecure |1.2.3b| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Offside Rear Stop lamp does not illuminate immediately a brake applies not working with rear foot pedal. |1.3.1a| | 1 |
| Rear Brake pedal mounting insecure |3.1.2a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Front Position lamp missing (4.2.1 (a)) | 1 |
| Rear Brake disc fractured (1.1.14 (a) (ii)) | 1 |
| Nearside Rear Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Offside Rear Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Rear Rear spring fractured |2.4.A1b|i|| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |