| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 31 |
| Registration plate issues | 24 |
| Drive chain excessively loose |6.2.1d| | 18 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 10 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 7 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 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| | 6 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 6 |
| Rear Drive chain excessively loose |6.2.1d| | 5 |
| Rear Wheel spoke excessively loose |4.2.1b| | 5 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 4 |
| Offside Rear Direction indicators not working |1.5.1c| | 4 |
| Exhaust excessively deteriorated |7.1.1a| | 4 |
| Registration plate lamp issues | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 3 |
| Rear Drive chain worn to excess |6.2.1e| | 3 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 3 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Offside Rear Direction indicator insecure |1.5.3b| | 3 |
| Rear Wheel spoke cracked. |4.2.1b| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 3 |
| Headlamp switch faulty |1.2.4| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Rear Brake locking device missing |3.2.A1e| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Front Plate brake test indicates a binding brake |3.3.B1a| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 2 |
| Front Brake master cylinder fluid level dangerously low |3.2.B1d| | 2 |
| Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Rear Wheel spoke missing |4.2.1b| | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Brake pedal pivots excessively worn |3.1.3a| | 2 |
| Offside Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Headlamp aim not tested |1.6| | 1 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Front position lamp insecure |1.1.1c| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Front Headlamp main beam affected by the operation of another lamp indicators affect operation |1.2.2c| | 1 |
| Front Headlamp dipped beam affected by the operation of another lamp indicators affect operation |1.2.2c| | 1 |
| Rear Brake pedal cannot be applied smoothly pedal strikes exhaust |3.1.3d| | 1 |
| Rear Brake pedal insecure worn pivot |3.1.2a| | 1 |
| Central Fuel system component insecure bolt missing from nearside mounting |7.2.1b| | 1 |
| Nearside Rear Footrest missing pillion footpeg missing |6.2.1a| | 1 |
| Offside Rear Footrest missing pillion footpeg missing |6.2.1a| | 1 |
| Headlamp aim not tested dipped beam inoperative |1.6| | 1 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Front Brake disc|s| excessively pitted |3.2.A1l| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear reflector on motorcycle deteriorated and function impaired |1.4.2a| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Nearside Rear Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Nearside Rear Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Front Brake grabbing severely |1.2.1 |c|| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Offside Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Brake reaction bracket insecure |3.2.A1j| | 1 |
| Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Brake locking device missing Split pin |3.2.A1e| | 1 |
| Stop lamp switch with a delay in operation front brake |4.3.2 |a| |ii|| | 1 |
| Front Direction indicator obviously incorrectly positioned less than 240mm apart |4.4.3 |a|| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Rear Brake excessively binding rear brake sticking on (1.2.1 (f)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Rear Brake pedal not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Rear Brake linkage clevis joint excessively worn |3.2.A1d| | 1 |
| Front Hydraulic brake control creeps under load. |3.1.4a| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Outer Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Nearside Rear Drive chain worn to excess |6.2.1e| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Front suspension spring worn and seriously weakened |2.3.2b| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Rear Position lamp showing white light to the rear (4.2.3 (a) (ii)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Rear 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)) | 1 |
| Front Handlebar deformed to the extent that steering is affected (2.2.1 (c) (ii)) | 1 |
| Handlebar fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Headlamp lens seriously defective (4.1.1 (b) (ii)) | 1 |
| Central Front Headlamp insecure (4.1.1 (c)) | 1 |
| Central Front Motorcycle structure is so deformed it is likely to adversely affect braking or steering Main down tube bent to the left off setting engine (6.1.1 (a) (ii)) | 1 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Front Drive chain sprocket so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Lower Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Suspension component pin or bush likely to become detached brake anchor pin missing (5.3.4 (a) (ii)) | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Rear Brake linkage has restricted free movement |1.1.15 |e|| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Offside Front Direction indicator incorrect colour |4.4.3 |a|| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Brake reaction bracket securing bolt|s| missing missing split pin |3.2.A1j| | 1 |
| Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Front Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Plate brake test No brake control achieves an efficiency of 30%. |3.3.B2a| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Rear Brake grabbing severely (1.2.1 (c)) | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Front Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Nearside Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |