| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 26 |
| Rear reflector missing (4.8.2 (a) (ii)) | 17 |
| Registration plate issues | 16 |
| Rear reflector on motorcycle missing |1.4.1| | 13 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 8 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 8 |
| Drive chain excessively loose |6.2.1d| | 8 |
| Registration plate lamp issues | 6 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 6 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 6 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Front Brake excessively binding (1.2.1 (f)) | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Horn not working |1.7.3a| | 4 |
| Rear reflector on motorcycle obscured |1.4.1| | 4 |
| Horn not working (7.7 (a)) | 4 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 4 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 4 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear reflector on motorcycle obscured |1.4.2b| | 3 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 3 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 3 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 3 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 3 |
| Rear Wheel spindle locking device missing (5.2.1 (d)) | 3 |
| Rear reflector missing |4.8.2 |a| |ii|| | 3 |
| Rear Lower Shock absorber has an excessively worn bush (5.3.2 (c)) | 3 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 3 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 3 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Rear Suspension component pin or bush excessively worn (5.3.4 (a) (i)) | 2 |
| Front Wheel spindle locking device missing (5.2.1 (d)) | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 2 |
| Front Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 2 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 2 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 2 |
| Rear Brake excessively binding |1.2.1 |f|| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Rear Suspension component mounting modified so the suspension is inoperative (5.3.3 (c) (ii)) | 2 |
| Rear Lower Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Front Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 2 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 2 |
| Front Wheel spoke excessively loose |4.2.1b| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Brake lever has restricted free movement Brake lever does not fit correctly and snags the master cylinder |1.1.15 |e|| | 2 |
| Stop lamp remains on when the brakes are released | 1 |
| Rear Wheel spindle locking device ineffective (5.2.1 (d)) | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Direction indicator missing both |1.5.1a| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Suspension arm pin or bush excessively worn |5.3.4 |a| |i|| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Nearside Front Footrest insecure |6.2.12 |a|| | 1 |
| Front Brake lever so insecure that the brake cannot be readily applied (1.1.2 (e) (ii)) | 1 |
| Nearside Front Brake component insecure pad retainer pin loose |1.1.21 |c|| | 1 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Chain guard insecure |6.1.7 |i|| | 1 |
| Offside Rear Outer Drive chain horseshoe locking device likely to become detached |6.1.7 |j| |ii|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Nearside Handlebar fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Rear Brake fluid significantly below minimum mark |1.1.10 |d| |ii|| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front Front suspension has severe distortion of a load bearing member or its supporting structure. |2.3.8| | 1 |
| Rear Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Chain guard insecure Missing |6.2.1c| | 1 |
| Rear mono-shock insecure Bottom nut missing |2.4.B.4| | 1 |
| Nearside Front Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded brakes binding excessively |3.2.A1h| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Front Brake pipe union leaking fluid |3.2.B4| | 1 |
| Offside Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Nearside Rear Direction indicator obviously incorrectly positioned broken and hanging down |4.4.3 |a|| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Centre Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Stop lamp not working From front control (4.3.1 (a) (ii)) | 1 |
| Stop lamp not working From rear control (4.3.1 (a) (ii)) | 1 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Wheel spindle locking device missing Split pin (5.2.1 (d)) | 1 |
| Rear Lower Suspension component pin or bush excessively worn Linkage (5.3.4 (a) (i)) | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 1 |
| Rear Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| All direction indicators missing |4.4.1 |a| |ii|| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Handlebar deformed to the extent that steering is affected (2.2.1 (c) (ii)) | 1 |
| Rear Brake grabbing severely (1.2.1 (c)) | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Front Shock absorber has negligible damping effect bottoms out when manually compressed (5.3.2 (b)) | 1 |
| Rear reflector missing Replaced (4.8.2 (a) (ii)) | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Rear suspension bearing has excessive free play FRONT DRAG LINK |2.4.A2a|i|| | 1 |
| Rear suspension bearing has excessive free play SWINGARM BEARING |2.4.A2a|i|| | 1 |
| Front Stop lamp not working FRONT BRAKE LEVER (4.3.1 (a) (ii)) | 1 |
| Rear Rear suspension movement is excessively stiff moving very slowing |2.4.A.3b| | 1 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Nearside Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Rear Suspension arm pin or bush excessively worn Seized linkage bearings |5.3.4 |a| |i|| | 1 |
| Brake lever insecure (1.1.2 (e) (i)) | 1 |
| Offside Rear Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Front Brake pipe at imminent risk of failure or fracture pipe worn through on disc (1.1.11 (a)) | 1 |
| Rear Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Lower Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Rear Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Lower Rear mono-shock insecure bolt loose with nut falling off |2.4.B.4| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear Rear suspension bearing excessively deteriorated |2.4A.2a|i|| | 1 |
| Rear Brake has no recorded effort at a wheel bled sytem (1.2.1 (a) (ii)) | 1 |
| Rear Wheel bearing so rough it is likely to overheat or break up replaced rear bearings (5.1.3 (b) (ii)) | 1 |
| Front Brake grabbing severely (1.2.1 (c)) | 1 |
| Front Horn not working (7.7 (a)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 1 |
| Centre Rear Upper Rear reflector on motorcycle missing reflctor missing |1.4.1| | 1 |
| Centre Rear Upper Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Centre Front Upper Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Centre Rear Lower Rear wheel bearings have excessive free play excess play rear wheel bearing |2.4.A.2c| | 1 |
| Offside Front Lower Steering movement excessively stiff with the wheel raised tight spot on wheel indicates warped disc |2.2.1b| | 1 |
| Steering linkage locking device missing rear wheel spindle lock pin (2.1.3 (d)) | 1 |
| Rear Brake disc|s| excessively pitted |3.2.A1l| | 1 |
| Front Drive chain worn to excess |6.2.1e| | 1 |
| Front Inner Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear reflector on motorcycle obscured Covered by "L" plate |1.4.2b| | 1 |
| Centre Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Horn not working missing (7.7 (a) (ii)) | 1 |
| Central Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Central Rear Upper Rear reflector on motorcycle missing |1.4.1| | 1 |
| Dipswitch does not operate immediately when selected on main beam (4.1.3 (b)) | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Nearside Front Brake disc significantly and obviously worn Min Thickness is 3.0mm measures 2.5mm (1.1.14 (a) (i)) | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride chain horse shoe clip wrong way round |6.2.1h| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Rear Direction indicator missing both rear |1.5.1a| | 1 |
| Stop lamp does not illuminate immediately a brake applies front and rear |1.3.1a| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Rear Hydraulic brake control creeps under load. |3.1.4a| | 1 |
| Rear Shock absorber has negligible damping effect Rear suspension seized |5.3.2 |b|| | 1 |
| Nearside Front All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Offside Front All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Offside Rear All direction indicators missing |4.4.1 |a| |ii|| | 1 |
| Nearside Rear All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Offside Handlebar mounting excessively deteriorated |flexible type| |2.1.1d| | 1 |
| Handlebar fractured |2.1.1b| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Rear Shock absorber has negligible damping effect Possible seized rear linkages/ no movement (5.3.2 (b)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Front Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Stop lamp not working front brake (4.3.1 (a) (ii)) | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Rear mono-shock pivot seized |2.4.B.4| | 1 |