| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 49 |
| Drive chain excessively loose |6.2.1d| | 15 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 14 |
| Rear reflector on motorcycle missing |1.4.1| | 14 |
| Registration plate issues | 14 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Steering headbearing has excessive free play |2.2.2| | 11 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 11 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 10 |
| Drive chain worn to excess |6.2.1e| | 9 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 9 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 9 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 8 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Drive chain excessively tight |6.2.1d| | 7 |
| Front suspension has inadequate damping effect. |2.3.6c| | 7 |
| Horn not working |1.7.3a| | 7 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 7 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 6 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 5 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 5 |
| Headlamp aim beam image kick up to the offside |1.6| | 5 |
| Rear Footrest missing |6.2.1a| | 5 |
| Nearside Rear Footrest missing |6.2.1a| | 5 |
| Offside Rear Footrest missing |6.2.1a| | 5 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 5 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 5 |
| Front Direction indicator not working |1.5.1c| | 4 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 4 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 4 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 4 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 4 |
| Riders seat insecure |6.2.1a| | 4 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Front wheel bearings are excessively rough |2.3.5b| | 4 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Rear Direction indicator not working |1.5.1c| | 3 |
| Nearside Rear Direction indicators not working |1.5.1c| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 3 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Front Horn not working |1.7.3a| | 3 |
| Front Steering headbearing has excessive free play |2.2.2| | 3 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Handlebar deformed |2.1.1b| | 3 |
| Offside Front Direction indicator not working |1.5.1c| | 3 |
| Offside Rear Direction indicator not working |1.5.1c| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Offside Front Direction indicator insecure |1.5.3b| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Front Steering lock stop ineffective |2.1.3| | 2 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Fuel system component leaking |7.2.1a| | 2 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 2 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 2 |
| Nearside Front Footrest insecure |6.2.1a| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Motorcycle structure excessively corroded |6.1.1a| | 2 |
| Horn sounds harsh or grating |1.7.3c| | 2 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Chain guard insecure |6.2.1c| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Nearside Front Direction indicator insecure |1.5.3b| | 2 |
| Offside Rear Direction indicator insecure |1.5.3b| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 2 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Rear Brake locking device missing |3.2.A1e| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Offside Rear Footrest insecure |6.2.1a| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Offside Front Lower Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Front Upper Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Offside Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Central Rear Lower Suspension component pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Nearside Rear Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Centre Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Front Outer Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Front Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Rear Brake pedal cracked |3.1.2c| | 1 |
| Rear Wheel spindle loose (5.2.1 (c) (i)) | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Front Steering lock stop missing |2.1.3| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Brake back plate|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Centre Front Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Offside Rear Lower Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking centre stand |6.1.1c| | 1 |
| Nearside Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Brake locking device insecure |3.2.A1e| | 1 |
| Offside Rear Lower Brake reaction bracket excessively corroded bolt loose in reaction bracket |1.1.15 |b|| | 1 |
| Rear Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Rear mono-shock pivot seized |2.4.B.4| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Brake locking device missing torque arm split pin.. |3.2.A1e| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Rear Exhaust excessively deteriorated |7.1.1a| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Seat insecure |6.2.1a| | 1 |
| Centre Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Brake cylinder leaking hydraulic fluid calliper piston |3.2.B1e| | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Registration plate lamp issues | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Offside Front Steering operation fouling on the fuel tank or bodywork on full lock |2.1.4 |b|| | 1 |
| Nearside Rear Shock absorber likely to become detached |5.3.2 |a| |ii|| | 1 |
| Nearside Rear Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Nearside Rear Motorcycle structure joining/attachment plate or fastening insecure sprocket |6.1.1 |b| |i|| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Front Brake grabbing severely (1.2.1 (c)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Nearside Front Steering lock stop ineffective |2.1.3| | 1 |
| Brake pedal is positioned so that the brake cannot be readily applied foiling on exhaust adjusted at vts |3.1.3c| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Front Brake excessively binding Binding badly - will overheat discs if ridden (1.2.1 (f)) | 1 |
| Front Throttle operating incorrectly |6.2.1f| | 1 |
| Offside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Headlamp light intensity severely reduced |4.1.4 |a|| | 1 |
| Front Steering lock stop loose |2.1.3| | 1 |
| Outer Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear Brake back plate|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Fuel tank leaking |7.2.1a| | 1 |
| Rear suspension has corrosion which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Front Decelerometer brake test indicates a sticking brake |3.3.E1d| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Front Horn not working |7.7 |a| |ii|| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Fuel cap sealing washer missing |7.2.2c| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Motorcycle structure excessively distorted |6.1.1a| | 1 |
| Front Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Brake linkage has abnormal movement due to excessive wear |3.2.A1i| | 1 |
| Rear mono-shock pivot seized |2.4.B.4| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Front Direction indicator insecure |1.5.3b| | 1 |
| Front Direction indicator missing |1.5.1a| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front Front mudguard insecure |2.3.7| | 1 |
| Rear Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear Brake component is severely distorted |3.1.5| | 1 |
| Front Handlebar deformed |2.1.1b| | 1 |
| Nearside Rear Drive chain worn to excess |6.2.1e| | 1 |
| Offside Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Nearside Steering lock stop maladjusted |2.1.3| | 1 |
| Rear Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Rear mono-shock insecure |2.4.B.4| | 1 |
| Rear Exhaust silencer insecure rear mounting bolt loose (8.1.1 (b) (i)) | 1 |
| Nearside Rear Motorcycle structure joining/attachment plate or fastening insecure chain adjuster bolt lock nut loose (6.1.1 (b) (i)) | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Throttle operating incorrectly throttle sticking |6.2.1f| | 1 |
| Front Headlamp aim beam image too far to the right |1.6.4| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Nearside Drive chain fouling another component |6.2.1d| | 1 |
| Nearside Drive chain worn to excess |6.2.1e| | 1 |
| Rear Brake pedal mounting insecure |3.1.2a| | 1 |
| Offside Rear Steering control handlebar movement restricted by cables caught on a projection |2.1.2c| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Centre Front Headlamp insecure |1.2.3b| | 1 |
| Rear Suspension component has excessive wear or free play lower link bush |5.3.3 |d|| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Fuel system component leaking fuel tap. |6.1.3 |b| |i|| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Offside Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Front Lower Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Front Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front Headlamp aim not tested |1.6| | 1 |
| Nearside Front Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Headlamp insecure (4.1.1 (c)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Brake lever attachment screws missing |3.1.2b| | 1 |
| Nearside Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Offside Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front Front position lamp insecure |1.1.1c| | 1 |
| Rear mono-shock insecure |2.4.B.4| | 1 |
| Rear Wheel fixing missing (multiple fixings) spit pin on brake arm (5.2.1 (a) (i)) | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 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 |
| Wheel alignment incorrect which adversely affects the handling (2.5.1) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Offside Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Brake pedal not releasing correctly and functionality of brakes affected |1.1.2 |b| |ii|| | 1 |
| Front Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Nearside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Nearside Rear Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Front Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Steering lock stop missing |2.1.3| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Nearside Front Headlamp switch faulty |1.2.4| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Rear Exhaust mounting missing |7.1.1c| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Footrest insecure |6.2.1a| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Front Footrest insecure |6.2.1a| | 1 |
| Front Decelerometer brake test indicates a binding brake |3.3.E1d| | 1 |
| Steering control handlebar movement restricted by cables caught on a projection |2.1.2c| | 1 |
| Offside Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |