| Most common failures | No# failures |
|---|
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 15 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 12 |
| Headlamp aim out of alignment | 11 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 8 |
| Horn not working |1.7.3a| | 6 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 6 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Rear reflector on motorcycle missing |1.4.1| | 6 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 4 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Drive chain excessively loose |6.2.1d| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Offside Front Direction indicators not working |1.5.1c| | 3 |
| Registration plate issues | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Offside Front Footrest insecure |6.2.1a| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 2 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Nearside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Headlamp switch faulty |1.2.4| | 2 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 2 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Nearside Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Rear wheel spindle loose |2.4.A.2b| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Fairing so located that it is likely to impede the steering |2.1.2e| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Nearside Exhaust excessively deteriorated |7.1.1a| | 1 |
| Offside Exhaust excessively deteriorated |7.1.1a| | 1 |
| Nearside Front Brake caliper|s| insecure |3.2.A1j| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Offside Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Offside Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Headlamp damaged and function impaired |1.2.3a| | 1 |
| Stop lamp does not illuminate immediately a brake applies control 1 |1.3.1a| | 1 |
| Stop lamp does not illuminate immediately a brake applies control 2 |1.3.1a| | 1 |
| Direction indicator flashing more than 120 times per minute All |1.5.1c| | 1 |
| Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Brake lever cannot be applied smoothly control 1 |3.1.3d| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock Turning right |2.1.4| | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Offside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Offside Handlebar deformed |2.1.1b| | 1 |
| Rear Brake disc|s| insecure |3.2.A1g| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 1 |
| Front Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Lower Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Front Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Offside Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Rear Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Front suspension assembly component loose |2.3.1| | 1 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Offside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Rear Brake cylinder insecurely mounted |3.2.B1a| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 1 |
| Centre Front Horn not working |1.7.3a| | 1 |
| Offside Front Throttle operating incorrectly |6.2.1f| | 1 |
| Offside Rear Brake pipe inadequately supported |3.2.B2b| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Offside Front Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Throttle operating incorrectly |6.2.7 |a| |i|| | 1 |
| Nearside Front Brake caliper inadequately mounted (1.1.16 (c) (i)) | 1 |
| Stop lamp not working probably a faulty switch at front brake lever (4.3.1 (a) (ii)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |