| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 49 |
| Drive chain excessively loose |6.2.1d| | 25 |
| Rear reflector on motorcycle missing |1.4.1| | 21 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 18 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 16 |
| Drive chain worn to excess |6.2.1e| | 15 |
| Registration plate issues | 15 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 13 |
| Steering headbearing has excessive free play |2.2.2| | 9 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 9 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 7 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 7 |
| Rear Brake locking device missing |3.2.A1e| | 7 |
| Front suspension has inadequate damping effect. |2.3.6c| | 7 |
| Headlamp aim beam image kick up to the offside |1.6| | 6 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 6 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 5 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Front wheel bearings are excessively rough |2.3.5b| | 4 |
| Brake pedal cannot be applied smoothly |3.1.3d| | 4 |
| Horn not working |1.7.3a| | 4 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear Wheel spoke excessively loose |4.2.1b| | 4 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| 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| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Rear reflector on motorcycle obscured |1.4.1| | 3 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 3 |
| Exhaust has part of the system missing |7.1.1a| | 3 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 3 |
| Registration plate lamp issues | 3 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Brake locking device missing |3.2.A1e| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Offside Rear Direction indicator not working |1.5.1c| | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Nearside Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 2 |
| Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 2 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 2 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Front Stop lamp missing |1.3.3a| | 2 |
| Rear Wheel spoke cracked. |4.2.1b| | 2 |
| Rear Gradient brake test indicates a sticking brake |3.3.D1c| | 2 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Fuel system component leaking |7.2.1a| | 2 |
| Fuel cap does not fasten securely by a positive means |7.2.2b| | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Brake pedal pivots excessively worn |3.1.3a| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Front Decelerometer brake test indicates a binding brake |3.3.E1d| | 2 |
| Rear Decelerometer brake test indicates a binding brake |3.3.E1d| | 2 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 2 |
| Rear Drive chain excessively loose |6.2.1d| | 2 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Front shock absorber seal failed and leaking oil rh |2.3.3| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Handlebar handgrip not secure to handlebars. Both the nearside and off side grips loose |2.1.1c| | 1 |
| Stop lamp does not illuminate immediately a brake applies Front offside brake lever |1.3.1a| | 1 |
| Rear Brake pedal has insufficient reserve travel |1.1.2 |a|| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Nearside Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Nearside Exhaust silencer insecure (8.1.1 (b) (i)) | 1 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Nearside Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Throttle operating incorrectly |6.2.1f| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Offside Footrest missing |6.2.1a| | 1 |
| Rear Gradient brake test indicates a binding brake |3.3.D1c| | 1 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Offside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Front Brake component leaking fluid |3.2.B4| | 1 |
| Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Nearside Fuel hose so insecure there is a risk of fire metal clips missing top and bottom of fuel pipe (6.1.3 (a) (ii)) | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear Stop lamp not working front control (4.3.1 (a) (ii)) | 1 |
| Offside Direction indicator not working not flashing, staying on (4.4.1 (a) (ii)) | 1 |
| Front shock absorber seal failed and leaking oil Both |2.3.3| | 1 |
| Inner Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Drive belt guard insecure |6.2.1c| | 1 |
| Front Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Rear Brake component modification unsafe rear torque arm loose (1.1.21 (d) (i)) | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Offside Front Brake lever attachment screws loose |3.1.2b| | 1 |
| Rear Brake drum|s| securing bolt|s| missing |3.2.A1g| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Indicator switch inoperative (4.4.2 (a) (ii)) | 1 |
| Front Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Stop lamp affected by the operation of the horn |1.3.2| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Front Horn not working |7.7 |a| |ii|| | 1 |
| Front Brake hose excessively twisted |1.1.12 |b| |ii|| | 1 |
| Rear Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Front suspension has a fracture of a load bearing member or its supporting structure. |2.3.8| | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Rear reflector on motorcycle obscured |1.4.2b| | 1 |
| Rear All position lamps not working |4.2.1 |a|| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Nearside Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Seat insecure |6.2.1a| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Fuel cap sealing washer missing |7.2.2c| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Offside Front Brake excessively binding |1.2.1 |f|| | 1 |
| Front Wheel excessively distorted |5.2.2 |c| |i|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Nearside Steering control handlebar movement restricted by cables caught on a projection |2.1.2c| | 1 |
| Nearside Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Brake reaction bracket insecure |3.2.A1j| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Centre Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Headlamp switch insecure |1.2.4| | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls control (4.3.2 (a) (iii)) | 1 |
| Rear Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Offside Front shock absorber seal failed and leaking oil R/H |2.3.3| | 1 |
| Stop lamp remains on when the brake is released Rear brake |1.3.1e| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Brake linkage has abnormal movement due to excessive wear |3.2.A1i| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Brake pedal insecure |3.1.2a| | 1 |
| Decelerometer brake test no brake control achieves an efficiency of 30% |3.3.E1a| | 1 |
| Offside Front Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Offside Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Chain guard fouling another component |6.2.1c| | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Upper Fuel tank leaking filler cap (6.1.3 (b) (i)) | 1 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Front Brake lever has insufficient reserve travel |1.1.2 |a|| | 1 |
| Fuel pipe leaking |7.2.1a| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Front Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Rear Brake component has an inadequate repair rear torque arm insecure |3.1.5| | 1 |
| Front Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Nearside Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Motorcycle structure adversely modified rear mudguard insecure.rear suspension. |6.1.1b| | 1 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Rear Brake component defective due to a deliberate modification which significantly reduces the original strength |3.1.5| | 1 |
| Rear Brake locking device insecure torque arm insecure |3.2.A1e| | 1 |
| Nearside Exhaust has part of the system missing |7.1.1a| | 1 |
| Offside Exhaust has part of the system missing |7.1.1a| | 1 |
| Offside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Horn control defective intermitent. |1.7.2a| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Rear Wheel spoke missing |4.2.1b| | 1 |
| Rear Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Nearside Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Nearside Indicator switch insecure |1.5.4| | 1 |
| Offside Front Position lamp switch insecure |1.1.4b| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Front Brake disc contaminated |1.1.14 |b|| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Steering operation impeded by a leg shield (2.1.4 (e)) | 1 |
| Front Brake disc contaminated Fork oil from leaking nearside fork (1.1.14 (b)) | 1 |
| Nearside Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Nearside Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Offside Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Front Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Brake locking device insecure |3.2.A1e| | 1 |
| Position lamp switch insecure Throttle Switch Insecure |1.1.4b| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Nearside Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Nearside Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |