| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 65 |
| Rear reflector on motorcycle missing |1.4.1| | 31 |
| Registration plate issues | 24 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 22 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 16 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 13 |
| Horn not working |1.7.3a| | 13 |
| Headlamp aim beam image kick up to the offside |1.6| | 9 |
| Front wheel bearings have excessive free play |2.3.5b| | 9 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 9 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 9 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 9 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 7 |
| Brake hose excessively deteriorated | 7 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 6 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Riders seat insecure |6.2.1a| | 5 |
| Fuel system component insecure |7.2.1b| | 5 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 4 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 4 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 4 |
| Drive chain excessively loose |6.2.1d| | 4 |
| Nearside Rear Direction indicator not working |1.5.1c| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Offside Front Direction indicator not working |1.5.1c| | 3 |
| Front Steering headbearing has excessive free play |2.2.2| | 3 |
| Fuel system component leaking |7.2.1a| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 3 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 3 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Front Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Rear Direction indicators not working |1.5.1c| | 2 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 2 |
| Headlamp switch faulty |1.2.4| | 2 |
| Chain guard fouling another component |6.2.1c| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 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 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 2 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 2 |
| Nearside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Drive chain fouling another component |6.2.1d| | 2 |
| All direction indicators not working |4.4.1 |a| |ii|| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Rear Brake locking device missing |3.2.A1e| | 2 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Nearside Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Front suspension assembly component missing |2.3.1| | 1 |
| Centre Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Offside Rear Brake component damaged and seriously reduced in strength |3.2.A1| | 1 |
| Front Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Offside Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Nearside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Rear Chain guard fouling another component |6.2.1c| | 1 |
| Fuel cap sealing washer torn |7.2.2c| | 1 |
| Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Brake lever insecure |3.1.2a| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Nearside Front Direction indicator missing |1.5.1a| | 1 |
| Nearside Rear Direction indicator missing |1.5.1a| | 1 |
| Offside Front Direction indicator missing |1.5.1a| | 1 |
| Offside Rear Direction indicator missing |1.5.1a| | 1 |
| Front Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front Front suspension assembly component loose |2.3.1| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Front Front position lamp incorrect colour |1.1.2a| | 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 Position lamp adversely affected by the operation of another lamp |4.2.3 |b|| | 1 |
| Headlamp light intensity severely reduced |4.1.4 |a|| | 1 |
| Fuel system component leaking carb |7.2.1a| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Front Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Brake lever attachment screws loose |3.1.2b| | 1 |
| Drive chain fouling another component drive chain being fouled by main stand |6.2.1d| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Offside Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Front wheel spindle loose |2.3.5a| | 1 |
| Front wheel spindle securing nut|s| loose |2.3.5a| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Rear wheel spindle loose |2.4.A.2b| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Brake lever mounting insecure |3.1.2a| | 1 |
| Brake reaction bracket insecure |3.2.A1j| | 1 |
| Rear suspension has a modification which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Footrest insecure |6.2.1a| | 1 |
| Front Brake pipe inadequately supported |3.2.B2b| | 1 |
| Front Brake pipe likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Rear Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front mudguard insecure bolt sheard off o/s front on mudguard |2.3.7| | 1 |
| Rear suspension bush has excessive free play excessive play rear swingarm bushes |2.4.A2a|i|| | 1 |
| Seat insecure |6.2.1a| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| 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 Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Nearside Indicator tell tale not functioning |1.5.2| | 1 |
| Handlebar mounting clamp bolt loose bars loose |2.1.1a| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Rear Brake lever excessively damaged |3.2.A1c| | 1 |
| Nearside Drive chain excessively loose |6.2.1d| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Offside Rear Brake locking device missing |3.2.A1e| | 1 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Centre Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Offside Rear Stop lamp missing |1.3.3a| | 1 |
| Front Position lamp not working side light |4.2.1 |a|| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Rear reflector on motorcycle damaged and function impaired |1.4.2a| | 1 |
| Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Rear Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Nearside Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Brake hose excessively kinked |3.2.B3a| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Nearside Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Offside Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Offside Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Nearside Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Brake pipe union leaking fluid |3.2.B4| | 1 |
| Rear Suspension arm pin or bush likely to become detached |5.3.4 |a| |ii|| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Front Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |
| Rear Rear suspension component excessively corroded. |2.4.A.1a| | 1 |
| Front Brake performance not tested |3.3| | 1 |
| Rear Brake performance not tested |3.3| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Floor brake test Neither brake control achieves an efficiency of 25% |3.3.C1b| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Riders seat missing |6.2.1a| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Headlamp incorrect colour |4.1.4 |a|| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Rear Brake locking device missing brake anchorage point |3.2.A1e| | 1 |
| Rear Brake locking device missing brake rod pin |3.2.A1e| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Nearside Front Brake disc|s| friction surface contaminated by oil or grease and offside front |3.2.A1k| | 1 |
| Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Front Front wheel spindle loose |2.3.5a| | 1 |
| Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Stop lamp does not illuminate immediately a brake applies Lamp not illuminating when front brake applied, switch wires appear to be disconnected. |1.3.1a| | 1 |
| Offside Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Front position lamp missing |1.1.1a| | 1 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Brake hose fouling |3.2.B3b| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Horn missing |1.7.1| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Rear Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Rear Floor brake test indicates a severely grabbing brake |3.3.C2d| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Fuel pipe leaking |7.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Central Rear Stop lamp not working bulb replaced at station |4.3.1 |a| |ii|| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 1 |
| Fuel cap leaking |6.1.3 |b| |i|| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Brake pedal attachment screws loose |3.1.2b| | 1 |
| Fuel system component leaking (6.1.3 (b) (i)) | 1 |