| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 29 |
| Steering headbearing has excessive free play |2.2.2| | 22 |
| Rear reflector on motorcycle obscured |1.4.1| | 16 |
| Rear reflector on motorcycle missing |1.4.1| | 14 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 13 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 12 |
| Handlebar mounting clamp loose |2.1.1a| | 10 |
| Horn not working |1.7.3a| | 10 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 9 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 9 |
| Direction indicators not working |1.5.1c| | 7 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 7 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 6 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Nearside Front Direction indicator not working |1.5.1c| | 5 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 5 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 4 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 4 |
| Offside Front Direction indicator not working |1.5.1c| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Registration plate issues | 3 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 3 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Nearside Front Front suspension assembly component excessively corroded. |2.3.1| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Rear Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Front Front suspension assembly component excessively corroded. |2.3.1| | 2 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Front Brake hose fouling |3.2.B3b| | 2 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Brake hose damaged | 2 |
| Nearside Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Offside Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Upper Steering headbearing has excessive free play |2.2.2| | 2 |
| Steering linkage has excessive free play |2.2.2| | 2 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 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 |
| Riders seat insecure |6.2.1a| | 2 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Front suspension assembly component excessively corroded. |2.3.1| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Offside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Nearside Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| All position lamps adversely affected by the operation of the horn |1.1.3b| | 1 |
| Front Upper Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Front Lower Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Handlebar mounting insecure |2.2.1 |a| |i|| | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear Brake lever has insufficient reserve travel |1.1.2 |a|| | 1 |
| Offside Front suspension assembly component excessively corroded. |2.3.1| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Steering lock stop loose |2.1.3| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Gradient brake test indicates a binding brake |3.3.D1c| | 1 |
| Gradient brake test indicates a severely grabbing brake |3.3.D1d| | 1 |
| Gradient brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.D1b| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Brake component is excessively corroded |3.1.5| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Rear Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Offside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Steering operation impeded by a fairing (2.1.4 (e)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Rear Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Brake lever mounting insecure |3.1.2a| | 1 |
| Rear Brake lever mounting insecure |3.1.2a| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Nearside Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Upper Handlebar mounting clamp loose |2.1.1a| | 1 |
| Rear Rear reflector on motorcycle obscured |1.4.2b| | 1 |
| Nearside Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Offside Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Nearside Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Offside Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Nearside Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Lower Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Rear Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Riders seat insecure lock assembly missing |6.2.1a| | 1 |
| Front Steering linkage has excessive free play |2.2.2| | 1 |
| Nearside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Centre Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Centre Rear Rear wheel spindle loose |2.4.A.2b| | 1 |
| Offside Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Centre Front Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Exhaust excessively deteriorated |7.1.1a| | 1 |
| Front Handlebar deformed |2.1.1b| | 1 |
| Rear reflector on motorcycle obscured |1.4.2b| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Brake lever mounting cracked |3.1.2c| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Nearside Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Fuel cap does not fasten securely by a positive means |7.2.2b| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Front Front shock absorber seal failed and leaking oil both |2.3.3| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Rear Braking system does not have an approriate system/s fitted according to its age |3.1.1| | 1 |
| Fairing insecure and likely to impede the steering |2.1.2e| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Front Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Brake lever insecure |3.1.2a| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Headlamp switch insecure |1.2.4| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Handlebar mounting clamp loose |2.1.1a| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 1 |
| Front Plate brake test indicates a severely juddering brake |3.3.B1b| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Nearside Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Stop lamp does not illuminate immediately a brake applies both front and rear |1.3.1a| | 1 |
| Offside Front Front suspension assembly component excessively corroded. |2.3.1| | 1 |