| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 40 |
| Rear reflector on motorcycle missing |1.4.1| | 38 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 26 |
| Horn not working |1.7.3a| | 25 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 24 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 20 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 19 |
| Registration plate issues | 18 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 16 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 14 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 14 |
| Drive chain worn to excess |6.2.1e| | 14 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 13 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 13 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 12 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 12 |
| Headlamp insecure |1.2.3b| | 11 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 10 |
| Steering headbearing has excessive free play |2.2.2| | 10 |
| Direction indicators not working |1.5.1c| | 9 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 8 |
| Drive chain excessively loose |6.2.1d| | 8 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 8 |
| 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| | 7 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 7 |
| Offside Rear Direction indicator not working |1.5.1c| | 6 |
| Front Wheel spoke excessively loose |4.2.1b| | 6 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 6 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 5 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 5 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 5 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 5 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Nearside Rear Direction indicator not working |1.5.1c| | 4 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Offside Front Direction indicator not working |1.5.1c| | 4 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 4 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 4 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 4 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 4 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Front Brake cylinder leaking hydraulic fluid |3.2.B1e| | 3 |
| Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 3 |
| Rear Footrest missing |6.2.1a| | 3 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 3 |
| Offside Front Direction indicators not working |1.5.1c| | 3 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 3 |
| Nearside Direction indicators not working |1.5.1c| | 3 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Rear Direction indicator not working |1.5.1c| | 3 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 3 |
| Handlebar deformed |2.1.1b| | 3 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 3 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 3 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Front position lamp insecure |1.1.1c| | 2 |
| Direction indicator not working |1.5.1c| | 2 |
| Front Footrest insecure |6.2.1a| | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Nearside Direction indicator not working |1.5.1c| | 2 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 2 |
| Front Headlamp insecure |1.2.3b| | 2 |
| Front Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Rear position lamp insecure |1.1.1c| | 2 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Front Direction indicator not working |1.5.1c| | 2 |
| Rear Rear wheel rotation likely to be impeded |6.2.1b| | 2 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 2 |
| Front Direction indicator missing |1.5.1a| | 2 |
| Offside Direction indicators not working |1.5.1c| | 2 |
| Nearside Rear Drive chain worn to excess |6.2.1e| | 2 |
| Nearside Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Offside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 2 |
| Rear position lamp damaged and function impaired |1.1.1b| | 2 |
| Direction indicator missing |1.5.1a| | 2 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Rear Direction indicator missing |1.5.1a| | 2 |
| Headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Offside Direction indicator not working |1.5.1c| | 2 |
| Offside Rear Direction indicator damaged and function impaired |1.5.3a| | 2 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Rear Drive chain excessively loose |6.2.1d| | 2 |
| Rear Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Headlamp aim not tested |1.6| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Nearside Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Wheel spoke excessively bent |4.2.1b| | 1 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front Vehicle identification number not permanently displayed |6.3.5a| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Inner Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Rear Drive chain excessively tight |6.2.1d| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Offside Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front wheel spindle securing nut locking device insecure |2.3.3a| | 1 |
| Front Brake hose stretched by suspension movement |3.2.B3b| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Front Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 1 |
| Front Headlamp light source and lamp not compatible (4.1.4 (c)) | 1 |
| Front Headlamp light intensity severely reduced (4.1.4 (a)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Front Lower Engine mounting/bracket missing Bolt missing and mount broken from frame (6.1.8 (a) (ii)) | 1 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Suspension component pin or bush excessively worn Swing arm bearings have excess play (5.3.4 (a) (i)) | 1 |
| Front Wheel spoke excessively loose (5.2.2 (d)) | 1 |
| Nearside Outer Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Front Headlamp damaged and function impaired |1.2.3a| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride sprocket |6.2.1h| | 1 |
| Offside Front Footrest insecure main footrest bent upwards |6.2.1a| | 1 |
| Direction indicators not working all |1.5.1c| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Rear Wheel damaged significantly reducing the original strength |4.2.1a| | 1 |
| Front Brake disc|s| securing bolt|s| missing |3.2.A1g| | 1 |
| Front Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Nearside Front Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Nearside Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Centre Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Rear spring incomplete |2.4.A1b|i|| | 1 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Direction indicator missing All |1.5.1a| | 1 |
| Rear suspension bush has excessive free play Shock lower bush |2.4.A2a|i|| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Fuel cap does not fasten securely by a positive means |7.2.2b| | 1 |
| Front Brake pipe inadequately supported |3.2.B2b| | 1 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Nearside Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Headlamp switch insecure |1.2.4| | 1 |
| An item not tested |Manual| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Brake pipe union leaking fluid |3.2.B4| | 1 |
| Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Rear Rear suspension has a modification which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Front Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Offside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Front Brake lever excessively damaged |3.2.A1c| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Offside Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Centre Riders seat insecure |6.2.1a| | 1 |
| Front Brake pipe likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Centre Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Centre Rear Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Offside Rear Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Footrest missing |6.2.1a| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Rear position lamp adversely affected by the operation of the horn |1.1.3b| | 1 |
| Offside Front Throttle operating incorrectly |6.2.1f| | 1 |
| Nearside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Centre Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Brake lever insecure |3.1.2a| | 1 |
| Brake lever attachment screws loose |3.1.2b| | 1 |
| Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Brake hose excessively kinked |3.2.B3a| | 1 |
| Direction indicator insecure |1.5.3b| | 1 |
| Nearside Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Steering lock stop missing |2.1.3| | 1 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear Brake linkage clevis joint excessively worn |3.2.A1d| | 1 |
| Rear Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Offside Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Rear position lamp flickers when tapped lightly by hand |1.1.3c| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Direction indicator incorrect colour |1.5.1b| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Front Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Nearside Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front Motorcycle structure adversely modified |6.1.1b| | 1 |
| Front Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Nearside Front Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Front wheel spindle securing nut|s| loose |2.3.3a| | 1 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Front wheel has a missing wheel nut|s| |4.2.3a| | 1 |
| Offside Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Front Brake lever attachment screws missing |3.1.2b| | 1 |
| Nearside Front Brake component leaking fluid |3.2.B4| | 1 |
| Nearside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Front Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Front Brake master cylinder severely damaged |3.2.B1b| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Stop lamp missing |1.3.3a| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Rear position lamp missing |1.1.1a| | 1 |
| Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Vehicle identification number not permanently displayed |6.3.5a| | 1 |
| Exhaust has part of the system missing |7.1.1a| | 1 |
| Front Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Front Position lamp switch faulty |1.1.4a| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Nearside Rear Direction indicator missing |1.5.1a| | 1 |
| Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |