| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 54 |
| Drive chain excessively loose |6.2.1d| | 25 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 19 |
| Rear reflector on motorcycle missing |1.4.1| | 17 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 16 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 13 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 12 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 11 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Horn not working |1.7.3a| | 11 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 11 |
| Registration plate issues | 10 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 10 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 9 |
| Rear reflector on motorcycle obscured |1.4.1| | 9 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 9 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 7 |
| Handlebar deformed |2.1.1b| | 7 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 6 |
| Front Direction indicator incorrect colour |1.5.1b| | 5 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 5 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 4 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Direction indicator incorrect colour |1.5.1b| | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Offside Rear Footrest missing |6.2.1a| | 4 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 4 |
| Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 4 |
| Nearside Front Direction indicators not working |1.5.1c| | 3 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 3 |
| Offside Front Direction indicator not working |1.5.1c| | 3 |
| Rear Direction indicator incorrect colour |1.5.1b| | 3 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 3 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Nearside Direction indicator incorrect colour |1.5.1b| | 2 |
| Offside Direction indicator incorrect colour |1.5.1b| | 2 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 2 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 2 |
| Registration plate lamp issues | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| An item not tested |Manual| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 2 |
| Rear reflector on sidecar missing |1.4.1| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Rear Drive chain excessively loose |6.2.1d| | 2 |
| Fuel cap does not fasten securely by a positive means |7.2.2b| | 2 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 2 |
| Rear Direction indicators not working |1.5.1c| | 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 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Headlamp insecure (4.1.1 (c)) | 2 |
| Nearside Front Direction indicator missing |1.5.1a| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Direction indicator incorrect colour x 4 |1.5.1b| | 1 |
| Offside Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Central Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Front Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Rear Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies stop lamp not working when rear brake is applied |1.3.1a| | 1 |
| Steering control handlebar movement restricted by cables caught on a projection |2.1.2c| | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Offside Rear Direction indicator likely to become detached |4.4.1 |c| |ii|| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Stop lamp remains on when the brake is released control 1 |1.3.1e| | 1 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Brake lever mounting insecure |3.1.2a| | 1 |
| Headlamp incorrect colour |1.2.1| | 1 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Centre Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Centre Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Centre Front Front position lamp insecure |1.1.1c| | 1 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Front Direction indicator missing |1.5.1a| | 1 |
| Nearside Rear All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Direction indicators not working both front |1.5.1c| | 1 |
| Direction indicators not working both rear |1.5.1c| | 1 |
| Headlamp main beam affected by the operation of the horn |1.2.2c| | 1 |
| Headlamp dipped beam affected by the operation of the horn |1.2.2c| | 1 |
| Rear position lamp adversely affected by the operation of the horn |1.1.3b| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Centre Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Nearside Rear Direction indicator missing |1.5.1a| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Front Brake lever is inoperative |3.1.3c| | 1 |
| Front Stop lamp missing |1.3.3a| | 1 |
| Rear Lower Chain guard insecure |6.2.1c| | 1 |
| Fuel cap sealing washer torn |7.2.2c| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride Split link not correctly fitted |6.2.1h| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Drive chain worn to excess Too much side play, requires replacement |6.2.1e| | 1 |
| Front suspension assembly component excessively bent |2.3.1| | 1 |
| Rear Stop lamp showing white light to the rear |4.3.3 |a| |ii|| | 1 |
| Brake disc|s| securing bolt|s| missing 2 |3.2.A1g| | 1 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front Front position lamp incorrect colour |1.1.2a| | 1 |
| Rear Footrest missing |6.2.12 |a|| | 1 |
| Rear Brake disc significantly and obviously worn run out |1.1.14 |a| |i|| | 1 |
| Drive chain excessively tight |6.1.7 |k| |i|| | 1 |
| All direction indicators incorrect colour showing white |4.4.3 |a|| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear position lamp missing |1.1.1a| | 1 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Front Handlebar deformed |2.1.1b| | 1 |
| Nearside Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Rear Drive chain excessively tight |6.1.7 |k| |i|| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Centre Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Nearside Rear Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Rear reflector on motorcycle obscured |1.4.2b| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Rear Brake component leaking fluid |3.2.B4| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Nearside Rear Direction indicator missing |4.4.1 |a| |ii|| | 1 |
| Nearside Rear Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Offside Rear Brake grabbing severely |1.2.1 |c|| | 1 |
| Central Rear Brake has no recorded effort at a wheel rear brake seized very badly |1.2.1 |a| |ii|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Nearside Drive chain excessively loose |6.2.1d| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Front Exhaust mounting missing |7.1.1c| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| All direction indicators not working When engine above idle speed |4.4.1 |a| |ii|| | 1 |
| Headlamp light intensity severely reduced When indicators used |4.1.4 |a|| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front position lamp damaged and function impaired |1.1.1b| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Stop lamp does not illuminate immediately a brake applies front brake |1.3.1a| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Rear Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Handlebar handgrip not secure to handlebars. Left hand. |2.1.1c| | 1 |
| Front shock absorber seal failed and leaking oil Left hand. |2.3.3| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Stop lamp remains on when the brake is released front brake lever. |1.3.1e| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort brake virtually inopperative |3.3.A1c| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Brake pedal is inoperative |3.1.3c| | 1 |
| Rear wheel has a loose wheel bolt|s| |4.2.3a| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Nearside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Stop lamp adversely affected by the operation of another lamp |4.3.3 |b|| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Centre Front Headlamp missing |1.2.3a| | 1 |
| Stop lamp does not illuminate immediately a brake applies via front brake |1.3.1a| | 1 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected throttle sticking when turning to the right (6.2.7 (a) (ii)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak Fork seal leaking (5.3.2 (b)) | 1 |
| Offside Front Shock absorber has a serious fluid leak Fork seal leaking (5.3.2 (b)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Steering operation linkage fouling when handlebars turned from lock to lock (2.1.4 (a)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls Front Control (4.3.2 (a) (iii)) | 1 |
| Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Fuel cap ineffective (6.1.3 (b) (i)) | 1 |
| Brake master cylinder leaking (1.1.10 (b) (ii)) | 1 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Front Wheel damaged or distorted to the extent that control of the motorcycle is likely to be adversely affected (5.2.2 (c) (ii)) | 1 |
| Rear Wheel damaged or distorted to the extent that control of the motorcycle is likely to be adversely affected (5.2.2 (c) (ii)) | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |