| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 52 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 25 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 22 |
| Steering headbearing has excessive free play |2.2.2| | 19 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 17 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 17 |
| Headlamp insecure |1.2.3b| | 14 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 13 |
| Registration plate issues | 12 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 9 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Horn not working |1.7.3a| | 8 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Rear reflector on motorcycle missing |1.4.1| | 7 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 7 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 5 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 5 |
| Front Headlamp insecure |1.2.3b| | 5 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 5 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 5 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 5 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 4 |
| Offside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 4 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 4 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Riders seat insecure |6.2.1a| | 4 |
| Rear reflector on motorcycle obscured |1.4.1| | 4 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 4 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Exhaust mounting missing |7.1.1c| | 3 |
| Nearside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 3 |
| Offside Rear Direction indicator insecure |1.5.3b| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 3 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 3 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 3 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Drive chain excessively loose |6.2.1d| | 3 |
| Stop lamp remains on when the brakes are released | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 2 |
| Offside Rear Direction indicator damaged and function impaired |1.5.3a| | 2 |
| Rear suspension component seized |2.4A2a|ii|| | 2 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Front Brake disc contaminated (1.1.14 (b)) | 2 |
| Rear Brake lever has insufficient reserve travel (1.1.2 (a)) | 2 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Rear Brake lever insecure |3.1.2a| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Nearside Front Direction indicator insecure |1.5.3b| | 2 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 2 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 2 |
| Front position lamp insecure |1.1.1c| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Centre Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Offside Rear Direction indicator missing |1.5.1a| | 1 |
| Nearside Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Rear Brake lever attachment screws loose |3.1.2b| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Nearside Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Rear Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Nearside Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Brake caliper leaking (1.1.16 (b) (i)) | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 1 |
| Offside Rear Footrest missing (6.2.12 (a)) | 1 |
| Offside Exhaust is leaking and excessively noisey mid section |7.1.1b| | 1 |
| Offside Front Stop lamp does not illuminate immediately a brake applies stopswitch fitted |1.3.1a| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling bent |2.4 |a|| | 1 |
| Front Shock absorber has a serious fluid leak both |5.3.2 |b|| | 1 |
| Front Shock absorber has negligible damping effect both |5.3.2 |b|| | 1 |
| Front Suspension component damaged and seriously weakened both |5.3.3 |b| |i|| | 1 |
| Rear Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Nearside Brake lever insecure |3.1.2a| | 1 |
| Brake lever has inadequate reserve travel rear brake |3.1.3b| | 1 |
| Brake component damaged and seriously reduced in strength |3.2.A1| | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 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 |
| Rear Roller brake test indicates a binding brake not cleanly releasing |3.3.A1a| | 1 |
| Front Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Centre Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Brake cable has a significantly damaged outer casing. |3.2.A1b| | 1 |
| Nearside Front Brake lever mounting insecure |3.1.2a| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Rear Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Rear Direction indicators affected by the operation of another lamp brake lamp |1.5.1c| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Offside Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Shock absorber has a serious fluid leak front/both (5.3.2 (b)) | 1 |
| Rear Footrest missing (6.2.12 (a)) | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Rear mono-shock pivot seized |2.4.B.4| | 1 |
| Rear Brake pedal is inoperative |3.1.3c| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Steering control handlebar movement restricted by cables caught on a projection |2.1.2c| | 1 |
| Front Stop lamp missing |1.3.3a| | 1 |
| Rear Wheel spoke excessively bent |4.2.1b| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Nearside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Centre Front Fuel system component insecure |7.2.1b| | 1 |
| Front Front position lamp does not face the front |1.1.1d| | 1 |
| Front Shock absorber has a serious fluid leak x 2 (5.3.2 (b)) | 1 |
| Nearside Rear Upper Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Rear Upper Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Floor brake test indicates a severely juddering brake |3.3C2d.| | 1 |
| Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Nearside Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Headlamp aim not tested |1.6| | 1 |
| Nearside Front Headlamp switch faulty |1.2.4| | 1 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Stop lamp remains on when the brake is released rear switch |1.3.1e| | 1 |
| Nearside Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Nearside Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear reflector on motorcycle obscured |1.4.2b| | 1 |
| Rear reflector on motorcycle insecure |1.4.2c| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Rear Direction indicator insecure |1.5.3b| | 1 |
| Stop lamp adversely affected by the operation of another lamp (4.3.3 (b)) | 1 |
| Stop lamp affected by the operation of the horn |1.3.2| | 1 |
| Rear Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Wheel more than one fixing loose (5.2.1 (a) (ii)) | 1 |
| Nearside Rear Direction indicator likely to become detached |4.4.1 |c| |ii|| | 1 |
| Nearside Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Rear Direction indicator incorrect colour damaged & shows white light to rear |1.5.1b| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls front lever (4.3.2 (a) (iii)) | 1 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Brake lever is positioned so that the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Nearside Brake lever insecure (1.1.2 (e) (i)) | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Brake lever excessively damaged |3.2.A1c| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride centre stand loose dragging close to floor |6.2.1h| | 1 |
| Front Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Brake lever insecure |3.1.2a| | 1 |
| Front Brake lever attachment screws loose |3.1.2b| | 1 |
| Brake component is fractured |3.1.5| | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Nearside Front suspension assembly component excessively bent |2.3.1| | 1 |
| Headlamp incorrect colour |1.2.1| | 1 |
| Front Front position lamp insecure |1.1.1c| | 1 |
| Rear Brake lever is inoperative |3.1.3c| | 1 |
| Centre Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Centre Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Front Horn control not functioning. |1.7.2b| | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Brake lever has insufficient reserve travel |1.1.2 |a|| | 1 |
| Front Forks excessively corroded Front suspension not working |2.2.2 |d| |i|| | 1 |
| Leg shield insecure and likely to impede the steering |2.1.2e| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Front Horn is not continous or uniform |1.7.3c| | 1 |
| Front Front suspension assembly component excessively corroded. |2.3.1| | 1 |
| Front Lower Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Front An item not tested |Manual| | 1 |
| Rear Brake lever has insufficient reserve travel brake shoes appear excessively worn (1.1.2 (a)) | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Front Wheel fixing loose |single fixing| |5.2.1 |a| |ii|| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Brake back plate|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Rear Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Rear Brake cable knotted |3.2.A1b| | 1 |
| Rear Brake linkage excessively corroded |3.2.A1c| | 1 |
| Nearside Front suspension assembly component excessively corroded. |2.3.1| | 1 |
| Offside Front suspension assembly component excessively corroded. |2.3.1| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Centre Front Upper Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Rear Brake lever mounting insecure |3.1.2a| | 1 |
| Nearside Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Nearside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Brake lever cannot be applied smoothly lever is notchy in application. |3.1.3d| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Front Steering operation impeded by a fairing |2.1.4 |e|| | 1 |
| Rear Brake effort inadequate at a wheel |1.2.1 |a| |i|| | 1 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Front Steering damper ineffective |2.1.4 |d| |i|| | 1 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |