| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 30 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 27 |
| Steering headbearing has excessive free play |2.2.2| | 18 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 17 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 16 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 15 |
| Registration plate issues | 14 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 13 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Horn not working |1.7.3a| | 9 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 8 |
| Rear reflector on motorcycle missing |1.4.1| | 8 |
| Front Brake lever insecure |3.1.2a| | 8 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 7 |
| Front Brake lever mounting insecure |3.1.2a| | 7 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 7 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 7 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Offside Front Direction indicator not working |1.5.1c| | 6 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Riders seat insecure |6.2.1a| | 5 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 4 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 4 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 3 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Nearside Front Direction indicator not working |1.5.1c| | 3 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Front suspension has inadequate damping effect. |2.3.6c| | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Brake lever insecure |3.1.2a| | 3 |
| Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Rear Brake lever insecure |3.1.2a| | 3 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 3 |
| Fuel system component leaking |7.2.1a| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 2 |
| Front Brake locking device missing |3.2.A1e| | 2 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Stop lamp emits other than a steady red light |1.3.1b| | 2 |
| Rear position lamp incorrect colour |1.1.2b| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Fuel cap sealing washer missing |7.2.2c| | 2 |
| Nearside Front Direction indicator missing |1.5.1a| | 2 |
| Rear reflector on motorcycle obscured |1.4.1| | 2 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 2 |
| Front An item not tested |Manual| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 2 |
| Rear Direction indicator not working |1.5.1c| | 2 |
| Offside Front Direction indicators not working |1.5.1c| | 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 |
| Offside Front Direction indicator insecure |1.5.3b| | 2 |
| Rear Footrest missing |6.2.1a| | 2 |
| Offside Front Front suspension assembly component excessively corroded. |2.3.1| | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Registration plate lamp issues | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Centre Lower Motorcycle structure cracked |6.1.1a| | 1 |
| Nearside Indicator tell tale not functioning |1.5.2| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Rear Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Offside Front Brake lever insecure |3.1.2a| | 1 |
| Offside Front Throttle operating incorrectly |6.2.1f| | 1 |
| Rear reflector on motorcycle obscured |1.4.2b| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Front suspension assembly component loose |2.3.1| | 1 |
| Horn control not readily accesible. |1.7.2a| | 1 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Inner Front Lower Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Offside Front Upper Throttle operating incorrectly |6.2.1f| | 1 |
| Offside Rear Lower Exhaust excessively deteriorated |7.1.1a| | 1 |
| Nearside Rear Brake locking device insecure |3.2.A1e| | 1 |
| Front Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Brake lever mounting insecure |3.1.2a| | 1 |
| Rear Fuel hose leaking |7.2.1a| | 1 |
| Rear Indicator switch does not operate the direction indicators on the side selected |1.5.4| | 1 |
| Centre Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Fuel cap sealing washer torn |7.2.2c| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Outer Rear Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Offside Outer Rear Motorcycle structure cracked |6.1.1a| | 1 |
| Offside Rear Direction indicator incorrect colour Lens missing |1.5.1b| | 1 |
| Front Brake disc|s| insecure |3.2.A1g| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |
| Front Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Rear wheel insecure |4.2.3b| | 1 |
| Nearside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Offside Brake lever insecure |3.1.2a| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Nearside Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Offside Rear Direction indicator likely to become detached |4.4.1 |c| |ii|| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Rear Brake cable excessively corroded |3.2.A1b| | 1 |
| Inner Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Offside Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Rear Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Fuel tank leaking |7.2.1a| | 1 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 1 |
| Rear Wheel damaged significantly reducing the original strength |4.2.1a| | 1 |
| Offside Indicator tell tale not functioning |1.5.2| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Rear Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Front Steering linkage has excessive free play |2.2.2| | 1 |
| Nearside Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Front Brake lever is inoperative |3.1.3c| | 1 |
| Front Brake lever excessively damaged |3.2.A1c| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Rear position lamp missing |1.1.1a| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Rear Rear reflector on motorcycle obscured |1.4.2b| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Nearside Front Upper Direction indicators not working |1.5.1c| | 1 |
| Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Offside Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Lower Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Drive belt fouling another component |6.2.1d| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front Upper Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Offside Lower An item not tested |Manual| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Offside Front Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear wheel has a missing wheel bolt|s| |4.2.3a| | 1 |
| Rear Rear wheel insecure |4.2.3b| | 1 |
| Nearside Rear Upper Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Rear Lower Brake reaction bracket insecure |3.2.A1j| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Front suspension assembly component excessively corroded. |2.3.1| | 1 |
| Nearside Brake lever cracked |3.1.2c| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Front Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Front Fuel cap sealing washer missing |7.2.2c| | 1 |
| Rear Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Front Brake linkage has abnormal movement due to excessive wear |3.2.A1i| | 1 |
| Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 1 |
| Front Lower Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 1 |
| Nearside Front Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Front Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Rear Wheel fixing loose (single fixing) (5.2.1 (a) (ii)) | 1 |
| Offside Front All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Engine mounting/bracket bracket damaged or deteriorated resulting in excessive movement (6.1.8 (a) (i)) | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Offside Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Front Forks excessively corroded (2.2.2 (d) (i)) | 1 |
| Front Brake performance not tested no front brake lever goes to bar - caliper is covered in fluid (1.2.1 (g)) | 1 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Handlebar deformed to the extent that steering is affected (2.2.1 (c) (ii)) | 1 |
| Rear Footrest missing (6.2.12 (a)) | 1 |
| Front Upper Steering operation impeded by a fairing (2.1.4 (e)) | 1 |
| Front Lower 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 |