| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 75 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 47 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 33 |
| Horn not working |1.7.3a| | 28 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 26 |
| Front wheel bearings have excessive free play |2.3.5b| | 25 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 24 |
| Rear reflector on motorcycle missing |1.4.1| | 22 |
| Registration plate issues | 20 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 19 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 14 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 12 |
| Exhaust excessively deteriorated |7.1.1a| | 11 |
| Throttle operating incorrectly |6.2.1f| | 11 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 11 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 11 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 11 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 10 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 10 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 9 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 9 |
| Front suspension has inadequate damping effect. |2.3.6c| | 9 |
| Horn not working (7.7 (a)) | 9 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 8 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 8 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Steering headbearing has excessive free play |2.2.2| | 8 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Offside Front Direction indicators not working |1.5.1c| | 7 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 6 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 6 |
| Nearside Front Direction indicator not working |1.5.1c| | 6 |
| Front wheel bearings are excessively rough |2.3.5b| | 6 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 6 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 6 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 6 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 6 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 6 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 6 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Front Position lamp not working (4.2.1 (a)) | 6 |
| Headlamp aim beam image kick up to the offside |1.6| | 5 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 5 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 5 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 5 |
| Rear reflector missing (4.8.2 (a) (ii)) | 5 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 5 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Centre Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Registration plate lamp issues | 4 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 4 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 4 |
| Front Brake excessively binding (1.2.1 (f)) | 4 |
| Headlamp insecure |1.2.3b| | 3 |
| Handlebar deformed |2.1.1b| | 3 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 3 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Rear Brake locking device missing |3.2.A1e| | 3 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Parking brake lever has no reserve travel |3.1.6b| | 3 |
| Front Front position lamp missing |1.1.1a| | 3 |
| Offside Front Direction indicator not working |1.5.1c| | 3 |
| Nearside Front Direction indicator insecure |1.5.3b| | 3 |
| Rear Brake excessively binding |1.2.1 |f|| | 3 |
| Stop lamp remains on when the brakes are released | 3 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 3 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Rear reflector missing |4.8.2 |a| |ii|| | 3 |
| Front Steering headbearing has excessive free play |2.2.2| | 3 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 3 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 3 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 2 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 2 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Rear Exhaust excessively deteriorated |7.1.1a| | 2 |
| Nearside Front suspension assembly component excessively corroded. |2.3.1| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Offside Front Brake disc|s| is excessively distorted |3.2.A1m| | 2 |
| Front Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 2 |
| Front Direction indicator not working |1.5.1c| | 2 |
| Front Brake pipe inadequately supported |3.2.B2b| | 2 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Brake pedal cannot be released smoothly |3.1.3d| | 2 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Stop lamp not working |1.2.1b| | 2 |
| Nearside Rear Shock absorber has a serious fluid leak |2.7.3| | 2 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 2 |
| Steering control handlebar movement restricted by cables caught on a projection |2.1.2c| | 2 |
| Offside Rear Exhaust mounting missing |7.1.1c| | 2 |
| Rear Brake disc|s| cracked |3.2.A1g| | 2 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Centre Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Horn sounds harsh or grating |1.7.3c| | 2 |
| Nearside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 2 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 2 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 2 |
| Front Plate brake test indicates a binding brake |3.3.B1a| | 2 |
| Front Valve stem seriously damaged |5.2.3 |j|| | 2 |
| Nearside Front Brake disc|s| is excessively distorted |3.2.A1m| | 2 |
| Offside Front Footrest insecure |6.2.1a| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 2 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| An item not tested |Manual| | 2 |
| Rear Position lamp not working |4.2.1 |a|| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Nearside Front Brake disc contaminated (1.1.14 (b)) | 2 |
| Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Front Horn not working (7.7 (a) (ii)) | 2 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Parking brake efficiency less than 50% of the required value (1.4.2 (a) (ii)) | 2 |