| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 24 |
| Rear reflector on motorcycle missing |1.4.1| | 19 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 11 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Front wheel bearings have excessive free play |2.3.5b| | 8 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Steering headbearing has excessive free play |2.2.2| | 7 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Registration plate issues | 7 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Front wheel bearings are excessively rough |2.3.5b| | 6 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Riders seat insecure |6.2.1a| | 5 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Drive chain excessively tight |6.2.1d| | 4 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Horn not working |1.7.3a| | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| 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| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Drive chain excessively loose |6.2.1d| | 3 |
| Front Riders seat insecure |6.2.1a| | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Front Steering headbearing has excessive free play |2.2.2| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Rear Brake disc|s| cracked |3.2.A1g| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Nearside Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Horn sounds harsh or grating |1.7.3c| | 2 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Rear Direction indicator not working |1.5.1c| | 2 |
| Front Direction indicator not working |1.5.1c| | 2 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Nearside Front Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Nearside Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Offside Front Footrest insecure |6.2.1a| | 2 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Rear Footrest missing |6.2.1a| | 2 |
| Rear reflector on motorcycle missing (1.4.1) | 2 |
| Rear Brake component insecure |1.1.21 |c|| | 1 |
| Offside Footrest insecure |6.2.12 |a|| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Rear Footrest insecure |6.2.1a| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Nearside Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Offside Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Brake hose leaking fluid |3.2.B4| | 1 |
| Nearside Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Front Fairings so located that it is likely to impede the steering |2.1.2e| | 1 |
| Offside Front Handlebar deformed |2.1.1b| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Nearside Floor brake test indicates a severely juddering brake |3.3C2d.| | 1 |
| Rear Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Offside Front Lower Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Gradient brake test indicates a binding brake |3.3.D1c| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 1 |
| Clutch lever bent so it cannot be readily operated. |6.2.1g| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Footrest insecure |6.2.1a| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Rear suspension has a fracture of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Offside Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear Brake pedal is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Brake component defective due to a deliberate modification which significantly reduces the original strength |3.1.5| | 1 |
| Offside Front Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Nearside Rear Drive chain excessively tight |6.2.1d| | 1 |
| Offside Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Nearside Front Headlamp switch faulty |1.2.4| | 1 |
| Nearside Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Offside Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Offside Front Front suspension assembly component loose |2.3.1| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Offside Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Exhaust has part of the system missing |7.1.1a| | 1 |
| Offside Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear reflector on motorcycle does not reflect squarely to the rear |1.4.1| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Offside Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Direction indicators affected by the operation of another lamp both |1.5.1c| | 1 |
| Indicator tell tale not operating correctly |1.5.2| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Nearside Front Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Offside Front Brake component leaking fluid |3.2.B4| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Offside Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Centre Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Handlebar deformed |2.1.1b| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Nearside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Rear Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Offside Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Front Steering control handlebar movement restricted by cables caught on a projection |2.1.2c| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Front Direction indicator obscured |1.5.1a| | 1 |
| Offside Front Direction indicator obscured |1.5.1a| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Headlamp switch insecure |1.2.4| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Nearside Front Handlebar cracked |2.1.1b| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Drive chain excessively loose |6.2.1d| | 1 |
| Nearside Drive chain worn to excess |6.2.1e| | 1 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Stop lamp remains on when the brake is released (1.3.1e) | 1 |
| Steering headbearing has excessive free play (2.2.2) | 1 |
| Steering movement excessively stiff with the weight on the lower bearing (2.2.1a) | 1 |
| Riders seat insecure (6.2.1a) | 1 |
| Nearside Rear position lamp flickers when tapped lightly by hand (1.1.3c) | 1 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s (1.2.2b(ii)) | 1 |
| Rear Brake reaction bracket securing bolt(s) loose (3.2.A1j) | 1 |
| Rear wheel rotation likely to be impeded (6.2.1b) | 1 |
| Offside Front shock absorber seal failed and leaking oil (2.3.3) | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort (3.3.A1d) | 1 |
| Rear Roller brake test indicates a binding brake (3.3.A1a) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Nearside Rear Position lamp showing white light to the rear lens damaged (4.2.3 (a) (ii)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Nearside Front Brake caliper insecure (1.1.16 (c) (i)) | 1 |
| Offside Front Brake caliper insecure (1.1.16 (c) (i)) | 1 |