| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 13 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Rear reflector on motorcycle missing |1.4.1| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Brake hose damaged | 2 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Registration plate issues | 2 |
| Rear Lower Rear suspension component loose |2.4.A.1a| | 1 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Front Hydraulic brake control creeps under load. |3.1.4a| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Drive chain excessively loose |6.2.1d| | 1 |
| Nearside Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Rear Upper Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Brake pedal insecure |3.1.2a| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Drive chain excessively loose |6.2.1d| | 1 |
| Front wheel spindle loose |2.3.5a| | 1 |
| Horn not working |1.7.3a| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Front wheel spindle securing nut|s| loose |2.3.5a| | 1 |
| Front wheel spindle securing nut locking device insecure |2.3.5a| | 1 |
| Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Nearside Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front suspension assembly has an insecure fork brace |2.3.4d| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front position lamp flickers when tapped lightly by hand |1.1.3c| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Brake hose excessively kinked |3.2.B3a| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Brake hose excessively deteriorated | 1 |
| Offside Handlebar deformed |2.1.1b| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Rear suspension component seized |2.4A2a|ii|| | 1 |
| Front Front position lamp insecure |1.1.1c| | 1 |
| Rear Front position lamp insecure |1.1.1c| | 1 |
| Front Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Lower Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Upper Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Drive chain excessively loose (6.2.1d) | 1 |
| Rear reflector on motorcycle missing (1.4.1) | 1 |