| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 42 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 37 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 28 |
| Rear reflector on motorcycle missing |1.4.1| | 23 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 20 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 19 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 16 |
| Registration plate issues | 14 |
| Steering headbearing has excessive free play |2.2.2| | 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 |
| Fuel cap sealing washer missing |7.2.2c| | 10 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 10 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 9 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 8 |
| Headlamp insecure |1.2.3b| | 8 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 8 |
| Riders seat insecure |6.2.1a| | 7 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 7 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 7 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 5 |
| Horn not working |1.7.3a| | 5 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 5 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 5 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 5 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 4 |
| Rear reflector on motorcycle obscured |1.4.1| | 4 |
| Front wheel bearings are excessively rough |2.3.5b| | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 4 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Nearside Front Direction indicators not working |1.5.1c| | 3 |
| Front Steering headbearing has excessive free play |2.2.2| | 3 |
| Exhaust excessively deteriorated |7.1.1a| | 3 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 3 |
| Headlamp aim not tested |1.6| | 3 |
| Offside Front Direction indicators not working |1.5.1c| | 3 |
| Nearside Front Direction indicator not working |1.5.1c| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Stop lamp emits other than a steady red light |1.3.1b| | 2 |
| Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 2 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 2 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 2 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear Brake lever mounting insecure |3.1.2a| | 2 |
| Offside Front Brake lever cannot be released smoothly |3.1.3d| | 2 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Rear wheel rotation likely to be impeded Rear mudguard insecure and is likely to foul rear wheel |6.2.1b| | 2 |
| Rear Brake lever has insufficient reserve travel (1.1.2 (a)) | 2 |
| Headlamp insecure (4.1.1 (c)) | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 2 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Front Shock absorber has negligible damping effect seized |5.3.2 |b|| | 1 |
| Inner Rear Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Rear Brake lining|s| contaminated by oil or grease |3.2.A1k| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Rear Brake cable badly frayed |3.2.A1b| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Rear spring worn and seriously weakened |2.4A1b|ii|| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Brake component is fractured |3.1.5| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Indicator switch does not operate the direction indicators on the side selected |1.5.4| | 1 |
| Front Brake hose excessively twisted |3.2.B3a| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Rear Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Indicator switch defective |1.5.4| | 1 |
| Nearside Front Shock absorber has an excessively worn bush |5.3.2 |c|| | 1 |
| Offside Front Shock absorber has an excessively worn bush |5.3.2 |c|| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Brake lever is so short and the brake cannot be readily applied Both |3.1.3c| | 1 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Brake lever insecure |3.1.2a| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Upper Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Nearside Front Steering control handlebar movement restricted by cables caught on a projection |2.1.2c| | 1 |
| Front Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Front Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Nearside Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Offside Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front position lamp does not illuminate immediately when switched on both |1.1.3a| | 1 |
| Nearside Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Front Brake lever mounting insecure |3.1.2a| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Nearside Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Rear Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Rear Brake lever excessively damaged |3.2.A1c| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Rear Brake lever is inoperative |3.1.3c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Front Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Front suspension has excessive stiffness in the suspension movement. Front forks seized |2.3.6b| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Stop lamp does not illuminate immediately a brake applies front & rear brake |1.3.1a| | 1 |
| Exhaust system insecure |6.1.2 |a|| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Steering operation fouling on the fuel tank or bodywork on full lock |2.1.4 |b|| | 1 |
| Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Nearside Front Shock absorber has negligible damping effect needs re grease |5.3.2 |b|| | 1 |
| Headlamp damaged and function impaired |1.2.3a| | 1 |
| Steering lock stop ineffective |2.1.3| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on number plate lamp not working |1.1.3a| | 1 |
| Rear position lamp insecure rear panel loose |1.1.1c| | 1 |
| Front suspension assembly excessive wear or free play in a front suspension component play in lower legs |2.3.4| | 1 |
| Nearside Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Offside Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Centre Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Nearside Rear Direction indicator missing |1.5.1a| | 1 |
| Nearside Brake lever insecure rear brake application |1.1.2 |e| |i|| | 1 |
| Nearside Rear Brake lever has insufficient reserve travel |1.1.2 |a|| | 1 |
| Nearside Rear Brake lever pivot excessively worn |1.1.1 |b|| | 1 |
| Offside Front Brake lever pivot excessively worn |1.1.1 |b|| | 1 |
| Rear Brake effort inadequate at a wheel |1.2.1 |a| |i|| | 1 |
| Headlamp light intensity severely reduced |4.1.4 |a|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Steering headbearing has excessive free play Excessive freeplay in steering bearings - Bearings require adjustment |2.2.2| | 1 |
| Front shock absorber seal failed and leaking oil Both fork seals failed and leaking oil causing no damping effect on compression or rebound |2.3.3| | 1 |
| Front wheel spindle loose |2.3.3a| | 1 |
| 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| | 1 |
| Nearside Front Lower Brake component cracked and seriously reduced in strength |3.2.A1| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Brake lever insecure |3.1.2a| | 1 |
| Nearside Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front Lower Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Front Handlebar mounting clamp loose |2.1.1a| | 1 |
| Nearside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Leg shield insecure and likely to impede the steering |2.1.2e| | 1 |
| Front Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition |8.1.1 |a|| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Nearside Front Direction indicator incorrect colour |4.4.3 |a|| | 1 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Front Brake disc significantly and obviously worn |1.1.14 |a| |i|| | 1 |
| Headlamp insecure |4.1.1 |c|| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Rear Shock absorber insecurely attached (5.3.2 (a) (i)) | 1 |
| Headlamp aim not tested headlamp not illuminating on dip or main beam (4.1.2 (b)) | 1 |
| Rear Brake lagging in operation Not releasing. (1.2.1 (d)) | 1 |
| Offside Front Direction indicator missing (4.4.1 (a) (ii)) | 1 |
| Headlamp insecure Headlamp bulb. (4.1.1 (c)) | 1 |
| Offside Front Direction indicator incorrect colour (4.4.3 (a)) | 1 |
| Fuel cap ineffective seal missing (6.1.3 (b) (i)) | 1 |
| Steering operation impeded by a fairing (2.1.4 (e)) | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Nearside Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Nearside Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Nearside Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Nearside Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Offside Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Nearside Rear Brake lever has insufficient reserve travel rear lever (1.1.2 (a)) | 1 |
| Front Shock absorber has negligible damping effect seized (5.3.2 (b)) | 1 |
| Front Motorcycle structure joining/attachment plate or fastening insecure fairing (6.1.1 (b) (i)) | 1 |
| Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition (8.1.1 (a)) | 1 |
| Exhaust has a major leak of exhaust gases at flange on cylinder head (6.1.2 (a)) | 1 |
| Front Brake grabbing severely (1.2.1 (c)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Nearside Front Direction indicator with a multiple light source more than 1/2 not functioning left (4.4.1 (a) (ii)) | 1 |
| Horn not working (7.7 (a)) | 1 |