| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 48 |
| Drive chain excessively loose |6.2.1d| | 26 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 15 |
| Drive chain worn to excess |6.2.1e| | 12 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 12 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 11 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 10 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 9 |
| Registration plate issues | 9 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Steering headbearing has excessive free play |2.2.2| | 7 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 5 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 5 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 4 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Nearside Rear Direction indicator not working |1.5.1c| | 4 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Nearside Front Direction indicators not working |1.5.1c| | 3 |
| Rear Drive chain excessively loose |6.2.1d| | 3 |
| Nearside Rear Direction indicators not working |1.5.1c| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Handlebar deformed |2.1.1b| | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 3 |
| Offside Rear Footrest missing |6.2.1a| | 3 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Offside Front Direction indicators not working |1.5.1c| | 3 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Drive chain fouling another component |6.2.1d| | 2 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Rear Rear reflector on motorcycle obscured |1.4.1| | 2 |
| Nearside Rear Footrest insecure |6.2.1a| | 2 |
| Front position lamp missing |1.1.1a| | 2 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 2 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Central Front Upper Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Horn not working |1.7.3a| | 2 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Nearside Front Direction indicator insecure |1.5.3b| | 2 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Front mudguard insecure |2.3.7| | 2 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 2 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front Handlebar deformed |2.1.1b| | 2 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 2 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Front Wheel spindle locking device missing (5.2.1 (d)) | 2 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| Offside Rear Footrest missing (6.2.12 (a)) | 2 |
| Fuel system component leaking carburettor |7.2.1a| | 1 |
| Rear Suspension arm corroded and seriously weakened (5.3.3 (b) (i)) | 1 |
| Offside Rear Brake locking device insecure |3.2.A1e| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Offside Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Front wheel spindle securing nut locking device insecure |2.3.3a| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Front Direction indicators flashing more than 120 times per minute and rear |1.5.1c| | 1 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Offside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear wheel insecure |4.2.3b| | 1 |
| Rear Rear wheel bearings have excessive free play Possibly Due To Rear Wheel Being Loose |2.4.A.2c| | 1 |
| Front Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Front Brake lever excessively damaged |3.2.A1c| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Wheel fixing missing (single fixing) split pin missing rear axle (5.2.1 (a) (ii)) | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Nearside Rear Direction indicator obscured |1.5.1a| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Brake drum|s| securing bolt|s| loose |3.2.A1g| | 1 |
| Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Offside Front suspension assembly component excessively bent |2.3.1| | 1 |
| Nearside Front suspension assembly component excessively bent |2.3.1| | 1 |
| Rear Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 1 |
| Motorcycle structure joining/attachment plate or fastening insecure Rear torque arm locking device missing |6.1.1 |b| |i|| | 1 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Brake lever has abnormal movement of levers indicating excessive wear or maladjustment |1.1.15 |f|| | 1 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 1 |
| Rear Footrest missing (6.2.12 (a)) | 1 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Nearside Rear Drive chain sprocket so loose it is likely to fail not loose ! sprocket nut locktabs not folded onto nuts |6.1.7 |c| |ii|| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Front Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Nearside Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Centre Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Centre Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Central Front Exhaust has a major leak of exhaust gases manifold leaking (6.1.2 (a)) | 1 |
| Front Wheel spindle or securing nut(s) so insecure that wheel security or steering control is adversely affected locking device missing off castle nut on spindle (5.2.1 (c) (ii)) | 1 |
| Rear Stop lamp not working no brake light when applying rear brake pedal (4.3.1 (a) (ii)) | 1 |
| Brake performance not tested (1.2.1 (g)) | 1 |
| Registration plate lamp issues | 1 |
| Exhaust has a major leak of exhaust gases large hole in side of silencer in two places corroded away (6.1.2 (a)) | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Drive chain excessively tight links tight due to rusty chain (6.1.7 (k) (i)) | 1 |
| Front Brake lever has insufficient reserve travel brake lever touching throttle when applying (1.1.2 (a)) | 1 |
| Nearside Indicator switch insecure |1.5.4| | 1 |
| Offside Headlamp switch insecure |1.2.4| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Brake locking device missing |3.2.A1e| | 1 |
| Nearside Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear Floor brake test indicates a severely grabbing brake |3.3.C2d| | 1 |
| Drive chain excessively loose Lacks lubrication. |6.2.1d| | 1 |
| Drive chain excessively tight Lacks lubrication/seizing up. |6.2.1d| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking Centre stand mounting broken.Spring retainer missing. |6.1.1c| | 1 |
| Rear Rear wheel spindle securing nut locking device missing Spindle split pin missing. |2.4.A.2b| | 1 |
| Nearside Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking Mirror loose. |6.1.1c| | 1 |
| Front Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Offside Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Offside Rear Brake drum|s| securing bolt|s| missing |3.2.A1g| | 1 |
| Brake back plate|s| securing bolt|s| missing rear |3.2.A1j| | 1 |
| Headlamp aim beam image kick up to the offside headlamp masks/converterfitted |1.6| | 1 |
| Rear Drive chain so loose it is likely to fail adjusted fully requires chain (6.1.7 (c) (ii)) | 1 |
| Rear Drive chain sprocket so loose it is likely to fail one sprocket bolt snapped/missing (6.1.7 (c) (ii)) | 1 |
| Front Headlamp insecure (4.1.1 (c)) | 1 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Offside Direction indicator not working no right hand indicators (4.4.1 (a) (ii)) | 1 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Brake pedal has insufficient reserve travel |1.1.2 |a|| | 1 |
| Front Direction indicator not working & rear dont flash |4.4.1 |a| |ii|| | 1 |
| Throttle operating incorrectly |6.2.7 |a| |i|| | 1 |
| Stop lamp does not illuminate immediately a brake applies Foot brake |1.3.1a| | 1 |
| Drive chain excessively tight, so that it is likely to fail |6.1.7 |k| |ii|| | 1 |
| Rear suspension bearing has excessive free play swinging arm |2.4.A2a|i|| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Lower Drive chain excessively loose |6.2.1d| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Rear Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Nearside Rear Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Offside Rear Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Direction indicators flashing more than 120 times per minute all 3 that are working |1.5.1c| | 1 |
| Direction indicator insecure all four inscure |1.5.3b| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride split link |6.2.1h| | 1 |
| Front Brake component has an inadequate repair |3.1.5| | 1 |
| Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Rear Brake excessively binding intermitantly (1.2.1 (f)) | 1 |
| Brake pedal insecure rod missing a split pin (1.1.2 (e) (i)) | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Nearside Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Nearside Drive chain excessively loose |6.2.1d| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front suspension assembly component excessively bent |2.3.1| | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Fuel cap ineffective (6.1.3 (b) (i)) | 1 |
| Rear Brake lining|s| less than 1.0 mm thick |1.1.13 |a|| | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Front shock absorber seal failed and leaking oil L/H fork seal |2.3.3| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on R/H |1.1.3a| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Offside Front Front suspension assembly component excessively corroded. |2.3.1| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Rear Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition |8.1.1 |a|| | 1 |
| Drive chain sprocket carrier worn to excess cush rubbers |6.2.1e| | 1 |
| Rear suspension bush has excessive free play swingarm |2.4.A2a|i|| | 1 |
| Offside Rear Lower Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Offside Front Brake component inadequately mounted Front brake pipe insecure (1.1.21 (c)) | 1 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 1 |
| Nearside Rear Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Nearside Front Indicator switch insecure |1.5.4| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |
| Front Headlamp aim not tested |1.6| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Brake rod insecure Rear brake torque arm securing not has no split pin (1.1.15 (c)) | 1 |