| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 37 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 12 |
| Throttle operating incorrectly |6.2.1f| | 12 |
| Registration plate issues | 11 |
| Drive chain excessively loose |6.2.1d| | 9 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Horn not working |1.7.3a| | 6 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Headlamp aim beam image kick up to the offside |1.6| | 6 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| Rear reflector on motorcycle missing |1.4.1| | 5 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 5 |
| Drive chain excessively tight |6.2.1d| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Nearside Rear Footrest insecure |6.2.1a| | 2 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 2 |
| Rear Brake component worn and seriously reduced in strength |3.2.A1| | 2 |
| Position lamp switch insecure |1.1.4b| | 2 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Offside Rear Position lamp not working |4.2.1 |a|| | 1 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Brake lever has insufficient reserve travel |1.1.2 |a|| | 1 |
| Handlebar handgrip missing |2.1.1c| | 1 |
| Nearside Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Front Front mudguard insecure |2.3.7| | 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 cannot be applied smoothly |3.1.3d| | 1 |
| Front wheel spindle loose |2.3.3a| | 1 |
| Headlamp incorrect colour |1.2.1| | 1 |
| Rear Stop lamp does not emit a steady light not working |1.3.1b| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Front Front position lamp insecure |1.1.1c| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Rear Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Front position lamp incorrect colour green |1.1.2a| | 1 |
| Stop lamp does not illuminate immediately a brake applies front brake control |1.3.1a| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Nearside Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Offside Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Offside Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Throttle operating incorrectly sticks on |6.2.1f| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Centre Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride split pin |6.2.1h| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Exhaust system insecure |6.1.2 |a|| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Front wheel spindle loose |2.3.5a| | 1 |
| Offside Front Upper Throttle operating incorrectly |6.2.1f| | 1 |
| Centre Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Offside Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Centre Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Brake disc in such a condition that it is seriously weakened rear |1.1.14 |a| |ii|| | 1 |
| Offside Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Service brake: efficiency below requirements |3.7.B.7| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Nearside Drive chain excessively loose |6.2.1d| | 1 |
| Nearside Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Forks insecure bolts loose in yokes |2.2.2 |d| |i|| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Rear Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| All direction indicators adversely affected by the operation of another lamp (4.4.3 (b)) | 1 |
| Rear Footrest missing (6.2.1a) | 1 |
| Drive chain worn to excess (6.2.1e) | 1 |
| Drive chain excessively tight (6.2.1d) | 1 |
| Nearside Rear Direction indicator missing (1.5.1a) | 1 |
| Centre Front Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected Cable sticking. (6.2.7 (a) (ii)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Central Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Nearside Rear Position lamp not working (4.2.1 (a)) | 1 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Rear Stop lamp does not illuminate by the operation of both brake controls brake light not operating from rear brake (4.3.2 (a) (iii)) | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Headlamp aim projected beam image obviously incorrect beam image appears as a ball of light no distinct pattern (4.1.2 (c)) | 1 |
| Central Front Position lamp not working (4.2.1 (a)) | 1 |
| Rear Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Rear Wheel spindle locking device ineffective (5.2.1 (d)) | 1 |
| Central Rear Lower Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Central Rear Lower Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Central Rear Lower Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |