| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 34 |
| Registration plate issues | 16 |
| Drive chain excessively loose |6.2.1d| | 15 |
| Horn not working |1.7.3a| | 14 |
| Rear reflector on motorcycle missing |1.4.1| | 12 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 12 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 8 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 8 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 5 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 5 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 3 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 3 |
| Nearside Front Direction indicator not working |1.5.1c| | 3 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Offside Rear Direction indicator not working |1.5.1c| | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Rear mono-shock insecure |2.4.B.4| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Horn missing |1.7.1| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Centre Lower Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Rear suspension has a fracture of a load bearing member or its supporting structure. |2.4.A.2d| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Horn not working (7.7 (a)) | 2 |
| Nearside Rear Footrest insecure |6.2.1a| | 2 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Riders seat insecure |6.2.5 |a| |ii|| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Rear Wheel spindle or securing nut(s) so insecure that wheel security or steering control is adversely affected (5.2.1 (c) (ii)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Rear Drive chain sprocket worn to excess crush drive and bearing (6.1.7 (c) (i)) | 1 |
| Inner Rear Lower Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Front Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Nearside Front Brake pipe excessively damaged |3.2.B2a| | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Nearside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Rear Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Nearside Handlebar handgrip missing |2.1.1c| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Brake pedal is inoperative |3.1.3c| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Indicator tell tale not operating correctly |1.5.2| | 1 |
| Offside Front Shock absorber has a serious fluid leak Fork leg leaking fluid. (5.3.2 (b)) | 1 |
| Nearside Rear Lower Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Nearside Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Stop lamp does not illuminate immediately a brake applies rear brake |1.3.1a| | 1 |
| Front Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 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 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Front Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Centre Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Brake component is fractured |3.1.5| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Floor brake test Neither brake control achieves an efficiency of 25% |3.3.C1b| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Central Rear Exhaust has a major leak of exhaust gases several corrosion holes in end of collector box in front of the rear wheel, gasses leaking. (6.1.2 (a)) | 1 |
| Offside Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Nearside Front Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Offside Front Throttle operating incorrectly |6.2.1f| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Brake performance not tested (1.2.1 (g)) | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Front Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear Stop lamp not working Brake lamp not working with rear application (4.3.1 (a) (ii)) | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Front position lamp missing |1.1.1a| | 1 |
| Front Headlamp insecure (4.1.1 (c)) | 1 |
| Headlamp aim not tested insecure (4.1.2 (b)) | 1 |
| Exhaust markings indicating not for road use or similar wording (6.1.2 (c)) | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Rear Fuel system component leaking |7.2.1a| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Rear Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front position lamp does not illuminate immediately when switched on side light |1.1.3a| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Offside Front Handlebar deformed |2.1.1b| | 1 |
| Lower Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Offside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear mono-shock insecure bottom mounting snapped off the unit completely |2.4.B.4| | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Headlamp incorrect colour |1.2.1| | 1 |
| Drive chain worn to excess Has seized links |6.2.1e| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Nearside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear position lamp flickers when tapped lightly by hand |1.1.3c| | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Nearside Front Upper Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Headlamp light source and lamp not compatible (4.1.4 (c)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Rear Brake disc|s| cracked |3.2.A1g| | 1 |
| Nearside Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Front Brake hose leaking fluid |3.2.B4| | 1 |
| Nearside Front Brake hose excessively kinked |3.2.B3a| | 1 |
| Brake hose leaking fluid |3.2.B4| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Offside Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Rear Wheel spindle locking device missing (5.2.1 (d)) | 1 |
| Direction indicators flashing less than 60 times a minute all |1.5.1c| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Rear suspension component cracked |2.4.A.1a| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |