| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 42 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 26 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 24 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 15 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 15 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 13 |
| Registration plate issues | 13 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 12 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 11 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 11 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 11 |
| Steering headbearing has excessive free play |2.2.2| | 11 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 8 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 8 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 7 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 7 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 7 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 6 |
| Horn is not a constant note |1.7.3c| | 6 |
| Offside Front Direction indicator insecure |1.5.3b| | 6 |
| Offside Rear Direction indicator insecure |1.5.3b| | 5 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 5 |
| Throttle operating incorrectly |6.2.1f| | 5 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Headlamp insecure |1.2.3b| | 5 |
| Rear Brake lever insecure |3.1.2a| | 5 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 5 |
| Front wheel bearings are excessively rough |2.3.5b| | 5 |
| Direction indicators not working |1.5.1c| | 4 |
| Riders seat insecure |6.2.1a| | 4 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 4 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| 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| | 4 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Horn not working |1.7.3a| | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Exhaust excessively deteriorated |7.1.1a| | 4 |
| Rear reflector on motorcycle missing |1.4.1| | 4 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Handlebar mounting clamp loose |2.1.1a| | 4 |
| Front Headlamp insecure |1.2.3b| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear Brake lever mounting insecure |3.1.2a| | 3 |
| Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 3 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 3 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 3 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 3 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Stop lamp remains on when the brakes are released | 3 |
| Horn sounds harsh or grating |1.7.3c| | 3 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 3 |
| Offside Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Offside Rear Direction indicator damaged and function impaired |1.5.3a| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 3 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 3 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Nearside Front Upper Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Front Upper Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Exhaust excessively deteriorated |7.1.1a| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Front Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| Stop lamp affected by the operation of the horn |1.3.2| | 2 |
| Front Handlebar mounting clamp loose |2.1.1a| | 2 |
| Nearside Rear Direction indicator deteriorated and function impaired |1.5.3a| | 2 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 2 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Rear Brake lever has abnormal movement of levers indicating excessive wear or maladjustment |1.1.15 |f|| | 2 |
| Nearside Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Nearside Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Rear Plate brake test indicates a sticking brake |3.3.B1a| | 2 |
| Rear Brake lever attachment screws loose |3.1.2b| | 2 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 2 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Stop lamp deteriorated and function impaired |1.3.3a| | 2 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 2 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Nearside Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Plate brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.B2b| | 2 |
| 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)) | 2 |
| Front Headlamp aim not tested |1.6| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Rear Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Nearside Front Brake lever insecure |3.1.2a| | 2 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Offside Rear Upper Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Offside Rear Lower Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Rear Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Nearside Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| An item not tested |Manual| | 1 |
| Brake performance not tested |3.3| | 1 |
| Nearside Fuel system component leaking |7.2.1a| | 1 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Centre Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Nearside Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Exhaust has a major leak of exhaust gases badly corroided |6.1.2 |a|| | 1 |
| Rear Wheel bearing so rough it is likely to overheat or break up |5.1.3 |b| |ii|| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Front Brake component is excessively corroded |3.1.5| | 1 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Brake hose damaged | 1 |
| Offside Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Wheel spindle or securing nut(s) so insecure that wheel security or steering control is adversely affected (5.2.1 (c) (ii)) | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Offside Front Upper Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Rear Upper Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Rear Upper Direction indicator insecure |1.5.3b| | 1 |
| Front Brake fluid not visible |1.1.10 |d| |iii|| | 1 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Front Shock absorber has a serious fluid leak both (5.3.2 (b)) | 1 |
| Rear Brake has no recorded effort at a wheel (1.2.1 (a) (ii)) | 1 |
| Front Shock absorber has negligible damping effect very slight movement |5.3.2 |b|| | 1 |
| Rear Brake back plate|s| insecure |3.2.A1j| | 1 |
| Front Headlamp incorrect colour |1.2.1| | 1 |
| Rear Brake lever is inoperative |3.1.3c| | 1 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Roller brake test indicates brake effort rise 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 |
| Nearside Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Nearside Front Suspension component corroded and seriously weakened (5.3.3 (b) (i)) | 1 |
| Front Suspension component insecure and control of the motorcycle impaired sized (5.3.3 (a) (ii)) | 1 |
| Nearside Rear Brake lever so insecure that the brake cannot be readily applied (1.1.2 (e) (ii)) | 1 |
| Nearside Rear Brake component insecure cable locking nut (1.1.21 (c)) | 1 |
| Centre Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Centre Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Centre Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Nearside Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Nearside Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Nearside Brake lever mounting insecure |3.1.2a| | 1 |
| Front Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Front Steering linkage has excessive free play |2.2.2| | 1 |
| Centre Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| All direction indicators adversely affected by the operation of another lamp (4.4.3 (b)) | 1 |
| Rear Position lamp adversely affected by the operation of another lamp (4.2.3 (b)) | 1 |
| Front Position lamp adversely affected by the operation of another lamp (4.2.3 (b)) | 1 |
| Front Stop lamp adversely affected by the operation of another lamp (4.3.3 (b)) | 1 |
| Rear Stop lamp adversely affected by the operation of another lamp (4.3.3 (b)) | 1 |
| Headlamp dipped beam flickers when tapped lightly by hand |1.2.2c| | 1 |
| Nearside Front suspension fouling which affects the movement of the front suspension. |2.3.6a| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Rear Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.4 |a|| | 1 |
| Front Shock absorber has a serious fluid leak both |5.3.2 |b|| | 1 |
| Rear Brake grabbing severely (1.2.1 (c)) | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Headlamp dipped beam affected by the operation of the horn |1.2.2c| | 1 |
| Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Front Brake disc contaminated |1.1.14 |b|| | 1 |
| Nearside Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Rear Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Nearside Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Rear Rear position lamp flickers when tapped lightly by hand |1.1.3c| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Nearside Rear Brake lever insecure |3.1.2a| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Nearside Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Offside Rear Direction indicator missing |1.5.1a| | 1 |
| Offside Rear Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear Wheel damaged significantly reducing the original strength |4.2.1a| | 1 |
| Front Brake pipe union leaking fluid |3.2.B4| | 1 |
| Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Front Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Brake lever mounting insecure |3.1.2a| | 1 |
| Centre Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Centre Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Offside Exhaust mounting missing |7.1.1c| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Front Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Offside Rear Direction indicator missing |4.4.1 |a| |ii|| | 1 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Nearside Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Front Lower Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride engine to fram bolt poss loose eccesive movememt |6.2.1h| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Front Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |