| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 63 |
| Registration plate lamp issues | 16 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Horn not working |1.7.3a| | 8 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 7 |
| Registration plate issues | 7 |
| Horn not working (7.7 (a) (ii)) | 5 |
| Rear reflector on motorcycle missing |1.4.1| | 5 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 5 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 5 |
| Drive chain excessively loose |6.2.1d| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 4 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 3 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 3 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Rear Brake excessively binding (1.2.1 (f)) | 3 |
| Horn not working (7.7 (a)) | 3 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Horn sound not in accordance with requirements (7.7 (c)) | 2 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Rear Brake disc contaminated |1.1.14 |b|| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 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 Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear Brake grabbing severely |1.2.1 |c|| | 2 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 2 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 2 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Nearside Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Headlamp aim not tested (4.1.2 (b)) | 2 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 2 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 2 |
| Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Offside Front Upper Stop lamp not working front brake light not working - stiff /sticky brake switch have oiled to cure (4.3.1 (a) (ii)) | 1 |
| Rear Motorcycle structure has a fracture which is likely to adversely affect braking or steering part of disc missing (6.1.1 (a) (ii)) | 1 |
| Rear Brake disc insecure 4 retaining bolts broken and missing (1.1.14 (a) (ii)) | 1 |
| Rear Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls switch defective (4.3.2 (a) (iii)) | 1 |
| Rear Shock absorber has negligible damping effect rear shock linkage seized (5.3.2 (b)) | 1 |
| Offside Front Shock absorber has a serious fluid leak fork |5.3.2 |b|| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Offside Front Headlamp aim so that beam "kick up" is not visible on the screen bulb incorrectly fittedf (4.1.2 (a)) | 1 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Stop lamp not working Not working on front brake control |4.3.1 |a| |ii|| | 1 |
| Direction indicator obviously incorrectly positioned rears too close together (4.4.3 (a)) | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Steering headbearing in such a condition that steering control is adversely affected |2.2.2 |f| |ii|| | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Rear Outer Shock absorber has an excessively worn bush |5.3.2 |c|| | 1 |
| Stop lamp does not illuminate immediately a brake applies Front switch faulty |1.3.1a| | 1 |
| Front Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Offside Front Headlamp incorrect colour (4.1.4 (a)) | 1 |
| Front Stop lamp not working brake |4.3.1 |a| |ii|| | 1 |
| Rear Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 1 |
| Offside Indicator switch inoperative |4.4.2 |a| |ii|| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Front position lamp incorrect colour front side lights blue light showing |1.1.2a| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Rear Brake lining|s| contaminated by oil or grease |3.2.A1k| | 1 |
| Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Front Floor brake test indicates a severely grabbing brake |3.3.C2d| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Throttle operating incorrectly throttle not returning (6.2.7 (a) (i)) | 1 |
| Rear Drive chain so loose it is likely to fail excessively loose (6.1.7 (c) (ii)) | 1 |
| Rear Drive chain so worn it is likely to fail chain excessively worn and links notchy (6.1.7 (c) (ii)) | 1 |
| Offside Rear Direction indicator likely to become detached |4.4.1 |c| |ii|| | 1 |
| Shock absorber has a serious fluid leak L/H fork seal (5.3.2 (b)) | 1 |
| Stop lamp not working Front circuit (4.3.1 (a) (ii)) | 1 |
| Offside Handlebar deformed |2.1.1b| | 1 |
| Offside Front suspension assembly component cracked |2.3.1| | 1 |
| Offside Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 1 |
| Rear Stop lamp not working bulb fitted |4.3.1 |a| |ii|| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Brake excessively binding Front Brake seized (1.2.1 (f)) | 1 |
| Drive chain excessively loose Chain Very lose and has tight spot (6.1.7 (c) (i)) | 1 |
| Offside Front Upper Stop lamp not working wires loose on front brake causing rear brake light not to illuminate when front brake lever pulled (4.3.1 (a) (ii)) | 1 |
| Offside Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Brake disc contaminated (1.1.14 (b)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Rear Brake disc|s| cracked |3.2.A1g| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Stop lamp does not illuminate immediately a brake applies With front brake |1.3.1a| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Offside Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Offside Front Upper Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Brake grabbing severely |1.2.1 |c|| | 1 |
| Rear Brake disc fractured |1.1.14 |a| |ii|| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Exhaust system insecure |6.1.2 |a|| | 1 |
| Rear Lower Brake disc fractured Brake disc bent (1.1.14 (a) (ii)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected Throttle sticking on full right lock |6.2.7 |a| |ii|| | 1 |
| Position lamp not working |4.2.1 |a|| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Front Lower Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Offside Front Lower Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Headlamp not working on dipped beam both bulbs inop (4.1.1 (a) (ii)) | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Central Rear Suspension arm pin or bush excessively worn seized bushes not allowing any travel on suspension at rear (5.3.4 (a) (i)) | 1 |
| Nearside Rear Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Offside Front Position lamp not working |4.2.1 |a|| | 1 |
| Offside Front Shock absorber has a serious fluid leak fork seal leaking (5.3.2 (b)) | 1 |
| Central Rear Lower Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Central Rear Lower Suspension component modified so the suspension is inoperative swingarm bearings seized (5.3.3 (c) (ii)) | 1 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Horn not working (7.7 (a) (ii)) | 1 |
| Front Handlebar so insecure it is likely to become detached (2.2.1 (b) (ii)) | 1 |
| Rear Motorcycle structure is fractured and structural rigidity is significantly reduced subframe brace split (6.1.1 (a) (i)) | 1 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Rear Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Nearside Locking devices not correctly fitted which may make the motor bicycle dangerous to ride pillion peg |6.2.1h| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Headlamp light source and lamp not compatible (4.1.4 (c)) | 1 |
| Stop lamp adversely affected by the operation of another lamp (4.3.3 (b)) | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Rear Drive chain excessively tight |6.2.1d| | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Rear Suspension component modified so the suspension is inoperative (5.3.3 (c) (ii)) | 1 |
| Offside Front Stop lamp does not emit a steady light front brake |switch| |1.3.1b| | 1 |
| Steering operation fouling on the fuel tank or bodywork on full lock Causing front brake lever to operate. |2.1.4 |b|| | 1 |
| Nearside Front Direction indicator incorrect colour (4.4.3 (a)) | 1 |
| Nearside Front Direction indicator adversely affected by the operation of another lamp (4.4.3 (b)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Nearside Front Position lamp not working |4.2.1 |a|| | 1 |
| Stop lamp not working front brake |4.3.1 |a| |ii|| | 1 |
| Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Rear Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |