| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 56 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 38 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 38 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 37 |
| Registration plate issues | 27 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 26 |
| Rear reflector on motorcycle missing |1.4.1| | 26 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 26 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 25 |
| Rear Brake disc|s| cracked |3.2.A1g| | 19 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 19 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 18 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 16 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 16 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 15 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 15 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 14 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 12 |
| Throttle operating incorrectly |6.2.1f| | 12 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 11 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 11 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 11 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 10 |
| Drive chain excessively loose |6.2.1d| | 10 |
| Drive chain excessively tight |6.2.1d| | 9 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 9 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Steering headbearing has excessive free play |2.2.2| | 8 |
| Front wheel bearings have excessive free play |2.3.5b| | 7 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 7 |
| Offside Front Brake disc|s| cracked |3.2.A1g| | 7 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 7 |
| Nearside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 6 |
| Exhaust excessively deteriorated |7.1.1a| | 6 |
| Horn not working |1.7.3a| | 6 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 6 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 6 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 5 |
| Front wheel bearings are excessively rough |2.3.5b| | 5 |
| Offside Front Brake disc contaminated (1.1.14 (b)) | 5 |
| Front Position lamp not working (4.2.1 (a)) | 5 |
| Rear Brake excessively binding (1.2.1 (f)) | 4 |
| Nearside Rear Direction indicators not working |1.5.1c| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 4 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 4 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 4 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 4 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Nearside Front Direction indicator not working |1.5.1c| | 4 |
| Horn not working (7.7 (a) (ii)) | 4 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 4 |
| Front An item not tested |Manual| | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 4 |
| Front Brake excessively binding |1.2.1 |f|| | 3 |
| Fuel system component insecure |7.2.1b| | 3 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 3 |
| Nearside Front Brake disc|s| cracked |3.2.A1g| | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 3 |
| Rear Drive chain worn to excess |6.2.1e| | 3 |
| Rear Drive chain excessively loose |6.2.1d| | 3 |
| Front Brake excessively binding (1.2.1 (f)) | 3 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Front Brake disc|s| cracked |3.2.A1g| | 3 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Brake hose excessively deteriorated | 3 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 3 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Nearside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 2 |
| Offside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Rear Brake component is excessively corroded |3.1.5| | 2 |
| Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Offside Rear Brake disc|s| cracked |3.2.A1g| | 2 |
| Upper Rear mono-shock pivot excessively worn |2.4.B.4| | 2 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 2 |
| Front Throttle operating incorrectly |6.2.1f| | 2 |
| Offside Front Footrest insecure |6.2.1a| | 2 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| An item not tested |Manual| | 2 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Headlamp switch faulty |1.2.4| | 2 |
| Brake pedal cannot be released smoothly |3.1.3d| | 2 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Nearside Front Brake caliper|s| insecure |3.2.A1j| | 2 |
| Rear Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Front position lamp incorrect colour |1.1.2a| | 2 |
| Offside Rear Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Rear Brake locking device missing |3.2.A1e| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Nearside Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 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 |
| Centre Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Nearside Front Brake cylinder severely corroded |3.2.B1b| | 2 |
| Offside Front Brake cylinder severely corroded |3.2.B1b| | 2 |
| Front Brake pipe likely to be fouled or trapped by moving parts |3.2.B2c| | 2 |
| Handlebar mounting clamp loose |2.1.1a| | 2 |