| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 39 |
| Rear reflector on motorcycle missing |1.4.1| | 19 |
| Horn not working |1.7.3a| | 9 |
| Drive chain excessively loose |6.2.1d| | 8 |
| Registration plate issues | 6 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Horn not working (7.7 (a) (ii)) | 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 |
| Registration plate lamp issues | 2 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 2 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 2 |
| Offside Front Footrest insecure |6.2.1a| | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Stop lamp does not illuminate immediately a brake applies front and rear brake |1.3.1a| | 1 |
| Rear Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Nearside Front Lower Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Front Upper Horn not working |1.7.3a| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies wires were disconnected |1.3.1a| | 1 |
| Headlamp incorrect colour |1.2.1| | 1 |
| Rear Motorcycle structure joining/attachment plate or fastening insecure (6.1.1 (b) (i)) | 1 |
| Front Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Front Position lamp missing (4.2.1 (a)) | 1 |
| Rear All direction indicators obviously incorrectly positioned |4.4.3 |a|| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear Wheel excessively damaged |5.2.2 |c| |i|| | 1 |
| Wheel bearing rough when rotated Sprocket carrier bearing|rear| |5.1.3 |b| |i|| | 1 |
| Wheel bearing play so excessive it is likely to break up Rear sprocket carrier bearing |5.1.3 |a| |ii|| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front Headlamp not working on dipped beam connector off (4.1.1 (a) (ii)) | 1 |
| Rear Position lamp adversely affected by the operation of another lamp (indicator affecting operation) (4.2.3 (b)) | 1 |
| Stop lamp not working rear switch |4.3.1 |a| |ii|| | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Nearside Front position lamp incorrect colour |1.1.2a| | 1 |
| Offside Front position lamp incorrect colour |1.1.2a| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Drive chain fouling another component |6.2.1d| | 1 |
| Rear 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 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Nearside Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Offside Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Rear Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 1 |
| Rear Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Centre Exhaust has part of the system missing |7.1.1a| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Direction indicators affected by the operation of another lamp Both rear wired incorrectly.wrong side comes on when fronts working. |1.5.1c| | 1 |
| Front Drive chain sprocket so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Drive chain horseshoe locking device likely to become detached Chain has split link fitted - requires rivet link (6.1.7 (j) (ii)) | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Nearside Front Upper Front position lamp deteriorated and function impaired side lamp bulb |1.1.1b| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Nearside Outer Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Chain guard insecure (6.1.7 (i)) | 1 |
| Front Brake component insecure front brake fluid reservoir broke away from securing mount (1.1.21 (c)) | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Front Brake lever attachment screws loose |3.1.2b| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |