| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 21 |
| Steering headbearing has excessive free play |2.2.2| | 20 |
| Rear reflector on motorcycle missing |1.4.1| | 11 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 10 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 10 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 8 |
| Registration plate issues | 8 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 8 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 7 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 7 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 5 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Front wheel bearings are excessively rough |2.3.5b| | 4 |
| Front Steering headbearing has excessive free play |2.2.2| | 3 |
| Rear reflector on motorcycle obscured |1.4.1| | 3 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 3 |
| Horn not working |1.7.3a| | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Rear Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 3 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Riders seat insecure |6.2.1a| | 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 |
| Rear Position lamp not working |4.2.1 |a|| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Upper Steering headbearing has excessive free play |2.2.2| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Handlebar mounting clamp loose |2.1.1a| | 2 |
| Rear Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 2 |
| Rear reflector on motorcycle obscured |1.4.2b| | 2 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 2 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Brake hose excessively deteriorated | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Upper Direction indicator not working |1.5.1c| | 1 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Headlamp missing |1.2.3a| | 1 |
| Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Registration plate lamp issues | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Front Handlebar so insecure it is likely to become detached |2.2.1 |b| |ii|| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Nearside Front All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Offside Front All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Nearside Rear All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Offside Rear All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Headlamp dipped beam affected by the operation of the horn |1.2.2c| | 1 |
| Headlamp main beam affected by the operation of the horn |1.2.2c| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Rear position lamp missing |1.1.1a| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Rear Lower Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Offside Front Brake lever pivot excessively tight (1.1.1 (a)) | 1 |
| Nearside Rear Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Front Brake lever attachment screws loose |3.1.2b| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Rear Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Rear Brake lever pivots excessively worn |3.1.3a| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| An item not tested |Manual| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Offside Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Offside Exhaust excessively deteriorated |7.1.1a| | 1 |
| Offside Rear Direction indicator likely to become detached |4.4.1 |c| |ii|| | 1 |
| Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Centre Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Centre Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Nearside Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| All position lamps adversely affected by the operation of the horn |1.1.3b| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front Steering headbearing in such a condition that steering control is adversely affected (2.2.2 (f) (ii)) | 1 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 1 |
| Motorcycle structure excessively distorted |6.1.1a| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Plate brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.B2b| | 1 |
| Front suspension assembly component excessively bent |2.3.1| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Horn not working (7.7 (a)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |