| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 39 |
| Rear reflector on motorcycle missing |1.4.1| | 22 |
| Drive chain worn to excess |6.2.1e| | 16 |
| Rear Wheel spoke excessively loose |4.2.1b| | 13 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 12 |
| Registration plate issues | 12 |
| Horn not working |1.7.3a| | 12 |
| Nearside Rear Direction indicator not working |1.5.1c| | 11 |
| Drive chain excessively loose |6.2.1d| | 11 |
| Rear Brake locking device missing |3.2.A1e| | 9 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 9 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 9 |
| Rear reflector on motorcycle obscured |1.4.1| | 9 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Front wheel bearings have excessive free play |2.3.5b| | 8 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Offside Rear Direction indicator not working |1.5.1c| | 7 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 7 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 7 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 6 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 4 |
| Offside Rear Direction indicators not working |1.5.1c| | 4 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Rear Wheel spoke missing |4.2.1b| | 3 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 3 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Rear Drive chain worn to excess |6.2.1e| | 3 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 3 |
| Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Brake reaction bracket insecure |3.2.A1j| | 3 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Rear Wheel spoke excessively bent |4.2.1b| | 2 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 2 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Offside Rear Direction indicator insecure |1.5.3b| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 2 |
| Rear Rear reflector on motorcycle obscured |1.4.1| | 2 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Front Brake disc significantly and obviously worn |1.1.14 |a| |i|| | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Nearside Rear Footrest insecure |6.2.1a| | 2 |
| Rear Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 2 |
| Nearside Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Nearside Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Fuel hose leaking |7.2.1a| | 2 |
| Nearside Rear Chain guard insecure |6.2.1c| | 2 |
| Offside Rear Exhaust excessively deteriorated |7.1.1a| | 2 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 2 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 2 |
| Rear Drive chain excessively loose |6.2.1d| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Front Brake locking device missing |3.2.A1e| | 1 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Rear Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Steering lock stop ineffective |2.1.3| | 1 |
| Footrest missing |6.2.1a| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Brake back plate|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Front Brake lever has abnormal movement of levers indicating excessive wear or maladjustment mount broken/fractured (1.1.15 (f)) | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Rear position lamp insecure |1.1.1c| | 1 |
| Front Upper Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Offside Outer Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Brake locking device insecure |3.2.A1e| | 1 |
| Stop lamp does not illuminate immediately a brake applies control 1 |1.3.1a| | 1 |
| Stop lamp does not illuminate immediately a brake applies control 2 |1.3.1a| | 1 |
| Offside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Stop lamp missing |1.3.3a| | 1 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Rear Brake pedal has insufficient reserve travel |1.1.2 |a|| | 1 |
| Exhaust has a major leak of exhaust gases rear exhaust pipe, holed and blowing (6.1.2 (a)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Lower Suspension component pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride brake plate pin missing |6.2.1h| | 1 |
| Nearside Front Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 1 |
| Exhaust has part of the system missing |7.1.1a| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Fuel cap mounting flange/sealing method defective |7.2.2c| | 1 |
| Offside Outer Front Direction indicator not working |1.5.1c| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride drive chain |6.2.1h| | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Brake back plate|s| insecure |3.2.A1j| | 1 |
| Front Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| An item not tested |Manual| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| All direction indicators missing |4.4.1 |a| |ii|| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Suspension component pin or bush excessively worn |5.3.4 |a| |i|| | 1 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Offside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Rear Brake component insecure brake arm bolt |1.1.21 |c|| | 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 |
| Headlamp aim not tested |1.6| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Clutch lever positioned so it cannot be readily operated. cable frayed |6.2.1g| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies faulty swith |1.3.1a| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Brake component inadequately mounted drum retainer lock nut |1.1.21 |c|| | 1 |
| Front Wheel more than one fixing missing split pin missing |5.2.1 |a| |ii|| | 1 |
| Front Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Offside Front Shock absorber has a serious fluid leak fork |5.3.2 |b|| | 1 |
| Nearside Rear Footrest missing |6.2.12 |a|| | 1 |
| Offside Rear Footrest missing |6.2.12 |a|| | 1 |
| Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 1 |
| Rear Motorcycle structure joining/attachment plate or fastening insecure mudguard |6.1.1 |b| |i|| | 1 |
| Front Motorcycle structure joining/attachment plate or fastening insecure headlamp cover |6.1.1 |b| |i|| | 1 |
| Fuel tank so insecure there is a risk of fire |6.1.3 |a| |ii|| | 1 |
| Front Wheel more than one fixing missing split pin |5.2.1 |a| |ii|| | 1 |
| Rear Brake component inadequately mounted anchor arm bolts |1.1.21 |c|| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Nearside Inner Front Upper Direction indicators not working |1.5.1c| | 1 |
| Centre Rear Lower Drive chain worn to excess |6.2.1e| | 1 |
| Centre Rear Lower Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Centre Front Lower Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Centre Rear Lower Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| All direction indicators missing (4.4.1 (a) (ii)) | 1 |
| Offside Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Nearside Front Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Front Handlebar deformed |2.1.1b| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Nearside Drive chain worn to excess |6.2.1e| | 1 |
| Offside Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Centre Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Centre Position lamp switch insecure |1.1.4b| | 1 |
| Front Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Front Direction indicator missing |1.5.1a| | 1 |
| Rear Direction indicator missing |1.5.1a| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Front Riders seat insecure |6.2.1a| | 1 |
| Nearside Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Decelerometer brake test indicates a severely grabbing brake |3.3.E1e| | 1 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Lower Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Wheel spoke cracked. |4.2.1b| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Offside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Brake hose damaged | 1 |
| Rear Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Offside Rear Direction indicator not working RHR indicator missing. (4.4.1 (a) (ii)) | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Front Upper Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Nearside Rear Lower Drive chain excessively loose |6.2.1d| | 1 |
| Front Steering linkage has excessive free play |2.2.2| | 1 |
| Nearside Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Rear Brake linkage has abnormal movement due to excessive wear |3.2.A1i| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear suspension component seized |2.4A2a|ii|| | 1 |
| All position lamps not working (4.2.1 (a)) | 1 |
| Stop lamp not working inoperative from front brake control (4.3.1 (a) (ii)) | 1 |
| Nearside Rear Direction indicator missing (4.4.1 (a) (ii)) | 1 |
| Offside Rear Direction indicator missing (4.4.1 (a) (ii)) | 1 |
| Nearside Front Direction indicator not working not flashing (4.4.1 (a) (ii)) | 1 |
| Offside Front Direction indicator not working not flashing (4.4.1 (a) (ii)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Front Brake lever has insufficient reserve travel |1.1.2 |a|| | 1 |
| Drive chain excessively tight (6.2.1d) | 1 |
| Rear Drive chain sprocket worn to excess (6.2.1e) | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort (3.3.A1d) | 1 |
| Headlamp at least one does not illuminate on main beam (1.2.2a(ii)) | 1 |
| Nearside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride (6.2.1h) | 1 |
| Nearside Handlebar handgrip not secure to handlebars. (2.1.1c) | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Nearside Handlebar handgrip missing |2.1.1c| | 1 |
| Rear Floor brake test indicates a severely grabbing brake |3.3.C2d| | 1 |
| Offside Front Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Front position lamp damaged and function impaired |1.1.1b| | 1 |
| Nearside Rear Drive chain worn to excess |6.2.1e| | 1 |
| Rear Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Rear mono-shock insecure |2.4.B.4| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Brake component insecure brake hose (1.1.21 (c)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Rear Suspension rod attachment bracket/mounting insecure split pin missing (5.3.3 (a) (i)) | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Rear Wheel spoke missing (5.2.2 (d)) | 1 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Offside Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear Upper Rear mono-shock insecure |2.4.B.4| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Nearside Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Front Rear reflector on motorcycle missing |1.4.1| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Rear Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Throttle operating incorrectly |6.2.1f| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |