| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 31 |
| Horn not working |1.7.3a| | 24 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 21 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 19 |
| Rear reflector on motorcycle missing |1.4.1| | 18 |
| Drive chain excessively loose |6.2.1d| | 17 |
| Direction indicators not working |1.5.1c| | 16 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 16 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 14 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 12 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 11 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 11 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 9 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 8 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 7 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 7 |
| Steering headbearing has excessive free play |2.2.2| | 7 |
| Stop lamp remains on when the brake is released |1.3.1e| | 6 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 6 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 6 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 6 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 5 |
| Offside Rear Direction indicator not working |1.5.1c| | 5 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 5 |
| Drive chain excessively tight |6.2.1d| | 5 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Throttle operating incorrectly |6.2.1f| | 5 |
| Horn is not a constant note |1.7.3c| | 5 |
| Nearside Rear Direction indicator not working |1.5.1c| | 5 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 5 |
| Rear Wheel spoke excessively loose |4.2.1b| | 5 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 4 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 4 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 4 |
| Registration plate issues | 4 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 4 |
| Fuel tank leaking |7.2.1a| | 4 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 3 |
| Front Steering headbearing has excessive free play |2.2.2| | 3 |
| Front Horn not working |1.7.3a| | 3 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 3 |
| Nearside Indicator tell tale not operating correctly |1.5.2| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Indicator tell tale not functioning |1.5.2| | 3 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Offside Rear Direction indicators not working |1.5.1c| | 3 |
| Offside Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 3 |
| An item not tested |Manual| | 3 |
| Nearside Rear Direction indicators not working |1.5.1c| | 3 |
| Direction indicator missing |1.5.1a| | 3 |
| Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 3 |
| Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 3 |
| Horn not working (7.7 (a) (ii)) | 3 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 3 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Rear Direction indicators not working |1.5.1c| | 3 |
| Horn is not continous or uniform |1.7.3c| | 3 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Nearside Front Upper Horn not working |1.7.3a| | 2 |
| Horn not working (7.7 (a)) | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Front Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| Rear Drive chain excessively loose |6.2.1d| | 2 |
| Front Direction indicator not working |1.5.1c| | 2 |
| Nearside Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Front Front mudguard insecure |2.3.7| | 2 |
| Rear Rear wheel spindle loose |2.4.A.2b| | 2 |
| Front Front wheel spindle securing nut locking device missing |2.3.5a| | 2 |
| Nearside Front Direction indicator missing |1.5.1a| | 2 |
| Offside Front Direction indicator missing |1.5.1a| | 2 |
| Nearside Rear Direction indicator missing |1.5.1a| | 2 |
| Offside Rear Direction indicator missing |1.5.1a| | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Brake pedal cannot be released smoothly |3.1.3d| | 2 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Rear Brake pedal is positioned so that the brake cannot be readily applied |3.1.3c| | 2 |
| Rear wheel insecure |4.2.3b| | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 2 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 2 |
| Front Headlamp insecure |1.2.3b| | 2 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Rear Direction indicator not working |1.5.1c| | 2 |
| Nearside Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Offside Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Fuel system component insecure |7.2.1b| | 2 |
| Stop lamp affected by the operation of the horn |1.3.2| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Rear reflector on motorcycle obscured |1.4.1| | 2 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 2 |
| Horn sounds harsh or grating |1.7.3c| | 2 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 2 |
| Nearside Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Brake locking device missing |3.2.A1e| | 2 |
| All direction indicators not working (4.4.1 (a) (ii)) | 2 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Offside Rear Brake locking device missing |3.2.A1e| | 2 |
| Horn control defective |1.7.2a| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 2 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Front Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Position lamp switch insecure |1.1.4b| | 1 |
| Indicator tell tale not operating correctly |1.5.2| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Front Horn control defective |1.7.2a| | 1 |
| Fuel hose leaking |7.2.1a| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Centre Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Centre Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Handlebar deformed |2.1.1b| | 1 |
| Nearside Rear Lower Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Front Lower Direction indicators not working |1.5.1c| | 1 |
| Fuel system component leaking (6.1.3 (b) (i)) | 1 |
| Front Brake caliper leaking (1.1.16 (b) (i)) | 1 |
| Rear Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Brake cable excessively corroded |3.2.A1b| | 1 |
| Nearside Front Upper Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Front Lower Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Rear Upper Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Nearside Front Upper Wheel spoke excessively loose |4.2.1b| | 1 |
| Nearside Rear Upper Wheel spoke excessively loose |4.2.1b| | 1 |
| Offside Front Upper Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Rear Lower Motorcycle structure adversely modified |6.1.1b| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Front Wheel spoke excessively bent |4.2.1b| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Wheel fixing missing |single fixing| split pin front wheel spindle missing |5.2.1 |a| |ii|| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Front Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Rear Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Front Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Nearside Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 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 |
| Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear All position lamps adversely affected by the operation of the horn |1.1.3b| | 1 |
| Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Front wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Motorcycle structure joining/attachment plate or fastening insecure |6.1.1 |b| |i|| | 1 |
| Front Brake locking device missing |3.2.A1e| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Centre Front Upper Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Centre Rear Upper Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Centre Front Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Headlamp main beam affected by the operation of the horn |1.2.2c| | 1 |
| Front Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front Headlamp switch faulty |1.2.4| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Front Brake cable has a significantly damaged outer casing. |3.2.A1b| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Front wheel insecure |4.2.3b| | 1 |
| Rear Front wheel insecure |4.2.3b| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front Front wheel spindle securing nut locking device insecure |2.3.5a| | 1 |
| Wheel spoke excessively corroded |4.2.1b| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Nearside Rear Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Nearside Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Nearside Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| All direction indicators missing (4.4.1 (a) (ii)) | 1 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Centre Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Centre Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Indicator tell tale not functioning |1.5.2| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Upper Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Offside Indicator tell tale not functioning |1.5.2| | 1 |
| Rear Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear position lamp flickers when tapped lightly by hand |1.1.3c| | 1 |
| Front Front wheel spindle securing nut locking device insecure |2.3.3a| | 1 |
| Rear Brake back plate|s| insecure |3.2.A1j| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Brake component damaged and seriously reduced in strength |3.2.A1| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Rear position lamp obscured more than 50% (1.1.1d) | 1 |
| Front Footrest insecure |6.2.12 |a|| | 1 |
| Front Brake component defective due to a deliberate modification which significantly reduces the original strength |3.1.5| | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected revs when turn bars |6.2.7 |a| |ii|| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Rear wheel spindle loose |2.4.A.2b| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Brake lever attachment screws loose |3.1.2b| | 1 |
| Rear Brake component is excessively corroded |3.1.5| | 1 |
| Front Footrest insecure |6.2.1a| | 1 |
| Front Brake drum|s| securing bolt|s| loose |3.2.A1g| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Centre Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Centre Front Headlamp incorrect colour |1.2.1| | 1 |
| Centre Front Horn not working |1.7.3a| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Stop lamp insecure |1.3.3b| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| All position lamps adversely affected by the operation of the horn |1.1.3b| | 1 |
| Front position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Rear Brake locking device insecure |3.2.A1e| | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Central Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Offside Front Brake lever excessively worn (1.1.15 (b)) | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Nearside Front Front suspension assembly component excessively bent |2.3.1| | 1 |
| Offside Front Front suspension assembly component excessively bent |2.3.1| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Brake locking device insecure |3.2.A1e| | 1 |
| Nearside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Nearside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Offside Front Steering lock stop ineffective |2.1.3| | 1 |
| Rear Brake rod excessively damaged |3.2.A1c| | 1 |
| Offside Front Throttle control functioning such that safe operation of the motorcycle is adversely affected engine runs flat out (6.2.7 (a) (ii)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Brake hose damaged | 1 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Nearside Front wheel spindle securing nut locking device insecure |2.3.3a| | 1 |
| Front Brake master cylinder severely damaged |3.2.B1b| | 1 |
| Offside Indicator tell tale not operating correctly |1.5.2| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Headlamp switch insecure |1.2.4| | 1 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Rear Brake component insecure (1.1.21 (c)) | 1 |
| Front Wheel spindle locking device missing (5.2.1 (d)) | 1 |
| Rear Wheel spindle locking device missing (5.2.1 (d)) | 1 |