| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 48 |
| Drive chain excessively loose |6.2.1d| | 22 |
| Rear reflector on motorcycle missing |1.4.1| | 19 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 18 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 14 |
| Registration plate issues | 14 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 12 |
| Steering headbearing has excessive free play |2.2.2| | 12 |
| Drive chain worn to excess |6.2.1e| | 11 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 10 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 7 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 7 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 7 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 5 |
| Front Steering headbearing has excessive free play |2.2.2| | 4 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Rear Wheel spoke cracked. |4.2.1b| | 4 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 4 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 4 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear reflector on motorcycle obscured |1.4.1| | 4 |
| Rear Brake locking device missing |3.2.A1e| | 4 |
| Front Wheel spoke excessively loose |4.2.1b| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear Wheel spoke excessively loose |4.2.1b| | 4 |
| Rear Drive chain worn to excess |6.2.1e| | 4 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 3 |
| Front suspension has inadequate damping effect. |2.3.6c| | 3 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Handlebar mounting clamp loose |2.1.1a| | 3 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 3 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 3 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Brake pedal pivots excessively worn |3.1.3a| | 3 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Front Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Horn not working |1.7.3a| | 2 |
| Chain guard insecure |6.2.1c| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Offside Rear Direction indicator insecure |1.5.3b| | 2 |
| Nearside Drive chain excessively loose |6.2.1d| | 2 |
| Offside Rear Footrest insecure |6.2.1a| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Centre Front Exhaust excessively deteriorated |7.1.1a| | 2 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Nearside 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| | 1 |
| An item not tested |Manual| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride brake drum bar no locking devise |6.2.1h| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Brake component modification unsafe Hose to long and catching on horn |1.1.21 |d| |i|| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Brake drum|s| securing bolt|s| loose |3.2.A1g| | 1 |
| Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Nearside Front Lower Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Front Lower Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Front Upper Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Centre Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Centre Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Front Brake performance not tested |3.3| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Exhaust has part of the system missing |7.1.1a| | 1 |
| Offside Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Front Brake pipe inadequately supported |3.2.B2b| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Brake pedal is inoperative |3.1.3c| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Outer Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride chain link |6.2.1h| | 1 |
| Rear Brake locking device missing brake rod |3.2.A1e| | 1 |
| Nearside Handlebar mounting clamp bolt missing top yoke bolt |2.1.1a| | 1 |
| Rear Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Front wheel bearings are excessively rough Front wheel bearings have both slight roughness and slight play. |2.3.5b| | 1 |
| Front wheel bearings have excessive free play Front wheel bearings have both slight play and roughness. |2.3.5b| | 1 |
| Rear Wheel spoke missing One spoke broken |4.2.1b| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Wheel spoke missing |4.2.1b| | 1 |
| Brake linkage has abnormal movement due to excessive wear foot brake |3.2.A1i| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Fuel system component leaking filter (6.1.3 (b) (i)) | 1 |
| Rear Brake pedal is inoperative |3.1.3c| | 1 |
| Rear Chain guard insecure |6.2.1c| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Brake pipe excessively chafed |3.2.B2a| | 1 |
| Front Brake hose leaking fluid |3.2.B4| | 1 |
| Front wheel spindle loose |2.3.5a| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| 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| | 1 |
| Brake pedal insecure |3.1.2a| | 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 |
| Registration plate lamp issues | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Front Brake component is excessively corroded |3.1.5| | 1 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Rear Brake pedal is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Headlamp aim not tested |1.6| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Wheel spoke cracked. |4.2.1b| | 1 |
| Nearside Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Direction indicator insecure |1.5.3b| | 1 |
| Rear Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Front position lamp adversely affected by the operation of the horn |1.1.3b| | 1 |
| Rear position lamp adversely affected by the operation of the horn |1.1.3b| | 1 |
| Stop lamp affected by the operation of the horn |1.3.2| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Offside Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Offside Brake pedal insecure |3.1.2a| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Rear Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Brake master cylinder severely damaged |3.2.B1b| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Front Headlamp aim beam image too far to the right |1.6.4| | 1 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Rear Brake locking device insecure |3.2.A1e| | 1 |
| Nearside Front Horn not working |1.7.3a| | 1 |
| Nearside Rear Shock absorber insecurely attached (5.3.2 (a) (i)) | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Front Brake hose stretched by steering movement |3.2.B3b| | 1 |
| Rear Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Nearside Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Offside Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Brake clevis joint insecure (1.1.15 (c)) | 1 |
| Rear Exhaust system insecure (6.1.2 (a)) | 1 |
| Front Upper Brake pipe union leaking fluid |3.2.B4| | 1 |
| Front Lower Brake pipe union leaking fluid |3.2.B4| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Seat insecure |6.2.1a| | 1 |
| Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Fuel cap sealing washer torn |7.2.2c| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Rear suspension component loose both shock top mounts |2.4.A.1a| | 1 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Offside Motorcycle structure cracked |6.1.1a| | 1 |
| Front Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Front Headlamp aim headlamp deteriorated and function impaired Wrong type of headlight fitted |1.2.3a| | 1 |
| Front Brake grabbing severely (1.2.1 (c)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Brake clevis joint insecure (1.1.15 (c)) | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Front Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Rear Brake lining(s) less than 1.0 mm thick (1.1.13 (a)) | 1 |
| Rear Brake pedal is positioned so that the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Front Brake pedal pivot excessively worn (1.1.1 (b)) | 1 |
| Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Rear Brake rod insecure (1.1.15 (c)) | 1 |
| Stop lamp does not illuminate immediately a brake applies off of front lever or pedal |1.3.1a| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Stop lamp does not illuminate immediately a brake applies front brake switch intermittant |1.3.1a| | 1 |
| Front Brake effort inadequate at a wheel compared to lever pressure (1.2.1 (a) (i)) | 1 |
| Nearside Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Brake back plate|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |