| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 38 |
| Drive chain excessively loose |6.2.1d| | 11 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 9 |
| Registration plate issues | 9 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Steering headbearing has excessive free play |2.2.2| | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Rear Brake disc|s| cracked |3.2.A1g| | 7 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Headlamp aim beam image kick up to the offside |1.6| | 6 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 5 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 5 |
| Horn not working |1.7.3a| | 4 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 4 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear Drive chain worn to excess |6.2.1e| | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Drive chain excessively tight |6.2.1d| | 4 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Offside Rear Direction indicator not working |1.5.1c| | 3 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Rear reflector on motorcycle missing |1.4.1| | 3 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Front Brake disc contaminated (1.1.14 (b)) | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Registration plate lamp issues | 2 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. (2.1.1c) | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| 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| | 2 |
| Rear Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Offside Front Direction indicators not working Also insecure. |1.5.1c| | 1 |
| Front Stop lamp remains on when the brake is released freed off switch. may require future attention |1.3.1e| | 1 |
| Front Shock absorber has a serious fluid leak both fork seals (5.3.2 (b)) | 1 |
| Offside Front Footrest insecure (6.2.12 (a)) | 1 |
| Nearside Front Footrest insecure (6.2.12 (a)) | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Decelerometer brake test indicates a sticking brake |3.3.E1d| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Rear Brake hose leaking (1.1.12 (c)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Rear Drive chain fouling another component |6.2.1d| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering horns fitted incorrecly |2.1.2a| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Position lamp switch does not operate the front and rear position lamps |1.1.4c| | 1 |
| Drive chain excessively loose (6.2.1d) | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Nearside Front Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Brake hose damaged | 1 |
| Horn not working (1.7.3a) | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Front Brake hose excessively twisted twisted due to insecure mounting, corrected (1.1.12 (b) (ii)) | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Suspension arm attachment bracket/mounting insecure mono link (5.3.3 (a) (i)) | 1 |
| Offside Handlebar handgrip not secure to handlebars. (2.1.1c) | 1 |
| Offside Front shock absorber seal failed and leaking oil (2.3.3) | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Offside Rear Direction indicator incorrect colour (1.5.1b) | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Drive chain sprocket so loose it is likely to fail REAR SPR. BEARING (6.1.7 (c) (ii)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Offside Indicator tell tale not functioning |1.5.2| | 1 |
| Nearside Front Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on (1.1.3a) | 1 |
| Offside Rear Wheel fixing missing (single fixing) (5.2.1 (a) (ii)) | 1 |
| Offside Rear Footrest insecure (6.2.12 (a)) | 1 |
| Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Front Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Stop lamp does not illuminate immediately a brake applies control one, wiring damaged |1.3.1a| | 1 |
| Stop lamp not working with front lever |4.3.1 |a| |ii|| | 1 |
| Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Nearside Drive chain excessively loose |6.2.1d| | 1 |
| Exhaust has part of the system missing |7.1.1a| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Brake disc fractured (1.1.14 (a) (ii)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Rear Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Inner Front Direction indicator not working |1.5.1c| | 1 |
| Front Brake lever excessively damaged |3.2.A1c| | 1 |
| Stop lamp not working pedal |4.3.1 |a| |ii|| | 1 |
| Nearside Front Direction indicator missing |1.5.1a| | 1 |
| Offside Front Direction indicator missing |1.5.1a| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Front Horn not working (7.7 (a) (ii)) | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Nearside Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Forks modification unsafe |2.2.2 |e|| | 1 |
| Rear Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 1 |
| Nearside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Offside Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Offside Rear Brake component is fractured |3.1.5| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front wheel spindle loose |2.3.3a| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |