| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 54 |
| Drive chain excessively loose |6.2.1d| | 10 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 7 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| 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|| | 7 |
| Registration plate issues | 7 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Registration plate lamp issues | 5 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Rear reflector on motorcycle missing |1.4.1| | 4 |
| Offside Rear Direction indicator not working |1.5.1c| | 4 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Horn not working (7.7 (a)) | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Horn not working |1.7.3a| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Rear Brake excessively binding (1.2.1 (f)) | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Brake performance not tested |3.3| | 2 |
| Fuel system component leaking |7.2.1a| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Offside Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Offside Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Nearside Front Footrest insecure circlip missing |6.2.1a| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Front Brake caliper leaking (1.1.16 (b) (i)) | 1 |
| Horn sounds harsh or grating |1.7.3c| | 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 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Nearside Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Front Headlamp incorrect colour |1.2.1| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Nearside Front Brake pipe union leaking fluid |3.2.B4| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Fuel tank leaking fuel tap leaking. (6.1.3 (b) (i)) | 1 |
| Nearside Front Handlebar so insecure it is likely to become detached (2.2.1 (b) (ii)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Nearside Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Offside Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Front Brake hose leaking (1.1.12 (c)) | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Nearside Exhaust has part of the system missing |7.1.1a| | 1 |
| Front An item not tested |Manual| | 1 |
| Rear An item not tested |Manual| | 1 |
| Gradient brake test No brake control achieves an efficiency of 30%. |3.3.D1a| | 1 |
| Gradient brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.D1b| | 1 |
| Gradient brake test Neither brake control achieves an efficiency of 25% |3.3.D1b| | 1 |
| Rear Brake disc|s| cracked |3.2.A1g| | 1 |
| Rear Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Rear Plate brake test indicates a sticking brake |3.3.B1a| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Headlamp dipped beam flickers when tapped lightly by hand |1.2.2c| | 1 |
| Brake lever insecure |3.1.2a| | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Nearside Front Brake fluid reservoir fluid level significantly below minimum level clutch (1.1.10 (d) (ii)) | 1 |
| Front wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Central Headlamp at least one does not illuminate on dipped beam blown bulb |1.2.2a|i|| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| All direction indicators not working not working on any control / not working on hazard (4.4.1 (a) (ii)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected throttle binding (6.2.7 (a) (ii)) | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| 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 |
| Fuel system component leaking (6.1.3 (b) (i)) | 1 |
| Offside Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Stop lamp showing white light to the rear (4.3.3 (a) (ii)) | 1 |
| Offside Rear Footrest insecure |6.2.12 |a|| | 1 |
| Nearside Front Horn not working |7.7 |a| |ii|| | 1 |
| Fuel system component leaking carbs |7.2.1a| | 1 |
| Front Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |
| Front Stop lamp not working brake control |4.3.1 |a| |ii|| | 1 |
| Rear position lamp adversely affected by the operation of the horn |1.1.3b| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Suspension component pin or bush excessively worn lower linkage (5.3.4 (a) (i)) | 1 |
| Throttle operating incorrectly |6.2.7 |a| |i|| | 1 |
| Front Front position lamp damaged and function impaired |1.1.1b| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Brake component is excessively corroded |3.1.5| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| 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 |
| Nearside Front Sidecar rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Rear Sidecar rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Sidecar wheel bearings are excessively rough |5.2.3d| | 1 |
| Sidecar wheel bearings have excessive free play |5.2.3c| | 1 |
| Front Sidecar direction indicator incorrect colour |1.5.1b| | 1 |
| Sidecar front position lamp incorrect colour |1.1.2a| | 1 |
| Offside Position lamp not working (4.2.1 (a)) | 1 |
| Nearside Front Sidecar direction indicator not working |1.5.1c| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Rear Hydraulic brake control creeps under load. |3.1.4a| | 1 |
| Direction indicator not working Right hand front (4.4.1 (a) (ii)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Nearside Front Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |