| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 114 |
| Drive chain excessively loose |6.2.1d| | 75 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 66 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 46 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 41 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 33 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 33 |
| Drive chain worn to excess |6.2.1e| | 33 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 27 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 20 |
| Handlebar deformed |2.1.1b| | 20 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 18 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 18 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 18 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 18 |
| Horn not working |1.7.3a| | 17 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 17 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 16 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 16 |
| Throttle operating incorrectly |6.2.1f| | 16 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 14 |
| Steering headbearing has excessive free play |2.2.2| | 14 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 14 |
| Registration plate issues | 14 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 13 |
| Front Brake excessively binding (1.2.1 (f)) | 13 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 12 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 12 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 12 |
| Drive chain excessively tight |6.2.1d| | 11 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 11 |
| Headlamp aim beam image kick up to the offside |1.6| | 10 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 10 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 10 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 9 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 9 |
| Exhaust excessively deteriorated |7.1.1a| | 8 |
| Rear Drive chain excessively loose |6.2.1d| | 8 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 8 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 8 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 7 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 7 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 7 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 7 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 7 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 6 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 6 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 6 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 6 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 6 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 6 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 6 |
| Rear Brake excessively binding (1.2.1 (f)) | 6 |
| Horn not working (7.7 (a)) | 6 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 5 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 5 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Headlamp switch faulty |1.2.4| | 5 |
| Rear Brake disc|s| cracked |3.2.A1g| | 5 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 5 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 5 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 5 |
| Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 5 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 5 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 5 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 5 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 5 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Rear reflector on motorcycle missing |1.4.1| | 4 |
| Front Brake excessively binding |1.2.1 |f|| | 4 |
| Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 4 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 4 |
| Nearside Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 4 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 4 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 4 |
| Offside Rear Footrest missing |6.2.1a| | 4 |
| Rear Brake component is severely distorted |3.1.5| | 4 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Front Steering headbearing has excessive free play |2.2.2| | 4 |
| Stop lamp remains on when the brakes are released | 4 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Front Position lamp not working (4.2.1 (a)) | 4 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 4 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Rear Drive chain worn to excess |6.2.1e| | 3 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Brake lever cannot be applied smoothly |3.1.3d| | 3 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Front Horn not working |1.7.3a| | 3 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 3 |
| Rear Brake caliper|s| insecure |3.2.A1j| | 3 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 3 |
| Brake pedal cannot be released smoothly |3.1.3d| | 3 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 3 |
| Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Offside Steering lock stop ineffective |2.1.3| | 3 |
| Chain guard insecure |6.2.1c| | 3 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 3 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 3 |
| Rear Brake disc|s| is excessively distorted |3.2.A1m| | 3 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 3 |
| Headlamp aim not tested |1.6| | 3 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Nearside Rear Footrest missing |6.2.1a| | 3 |
| Rear Plate brake test indicates a binding brake |3.3.B1a| | 3 |
| Offside Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 3 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 3 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 3 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 3 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 3 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 3 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 3 |