| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 15 |
| Rear reflector missing (4.8.2 (a) (ii)) | 8 |
| Registration plate lamp issues | 7 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 7 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 7 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 6 |
| Rear reflector missing |4.8.2 |a| |ii|| | 6 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 5 |
| Drive chain excessively loose |6.2.1d| | 4 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 4 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 3 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Registration plate issues | 3 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 3 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Rear Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 3 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Nearside Front Footrest insecure (6.2.12 (a)) | 3 |
| Rear Footrest missing (6.2.12 (a)) | 2 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 2 |
| Nearside Rear Footrest insecure |6.2.12 |a|| | 2 |
| Offside Rear Footrest insecure |6.2.12 |a|| | 2 |
| Headlamp insecure (4.1.1 (c)) | 2 |
| Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Rear Drive chain excessively loose |6.1.7 |c| |i|| | 2 |
| Front Brake master cylinder leaking (1.1.10 (b) (ii)) | 2 |
| Nearside Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Rear Footrest missing |6.2.12 |a|| | 2 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 2 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Exhaust silencer insecure (8.1.1 (b) (i)) | 2 |
| Rear Drive chain sprocket excessively loose (6.1.7 (c) (i)) | 2 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Horn not working |1.7.3a| | 1 |
| Drive chain sprocket excessively loose Sprocket hub bearing worn (6.1.7 (c) (i)) | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Drive chain sprocket worn to excess both |6.1.7 |c| |i|| | 1 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Rear Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Offside Rear Footrest missing (6.2.12 (a)) | 1 |
| Rear Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Position lamp not working no rear light (4.2.1 (a)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Rear Brake pedal not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Dipswitch does not operate immediately when selected on main beam |4.1.3 |b|| | 1 |
| Front Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 1 |
| Front Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Front Brake disc contaminated |1.1.14 |b|| | 1 |
| Exhaust silencer insecure |8.1.1 |b| |i|| | 1 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 1 |
| Nearside Rear Drive chain sprocket so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Nearside Front Drive chain sprocket so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Front Steering headbearing excessively stiff or notchy top and bottom bearings (2.2.2 (f) (i)) | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Front Handlebar excessively deformed (2.2.1 (c) (i)) | 1 |
| Central Lower Brake lever is bent and the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Nearside Footrest insecure (6.2.12 (a)) | 1 |
| Offside Footrest insecure (6.2.12 (a)) | 1 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Offside Exhaust silencer insecure strap loose (8.1.1 (b) (i)) | 1 |
| Offside Brake lever has restricted free movement brake lever rubbing on downpipe (1.1.15 (e)) | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Rear Wheel bearing has excessive play crush drive bearing (5.1.3 (a) (i)) | 1 |
| Rear Brake indicates excessive fluctuation of brake effort drum oval (1.2.1 (e)) | 1 |
| Drive chain sprocket excessively loose carrier bearing has excessive play |6.1.7 |c| |i|| | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Drive chain excessively tight, so that it is likely to fail |6.1.7 |k| |ii|| | 1 |
| Nearside Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Nearside Front Footrest insecure |6.2.12 |a|| | 1 |
| Front Brake lever insecure (1.1.2 (e) (i)) | 1 |
| Nearside Front Suspension component damaged and seriously weakened fork stanchion bent (5.3.3 (b) (i)) | 1 |
| Nearside Rear Footrest missing |6.2.12 |a|| | 1 |
| Offside Rear Footrest missing |6.2.12 |a|| | 1 |
| Footrest insecure Left hand front, no securing split pin |6.2.12 |a|| | 1 |
| Rear Brake pedal is positioned so that the brake cannot be readily applied Too high from footest to apply easily. |1.1.2 |d|| | 1 |
| 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 |
| Brake component inadequately mounted Front brake disc replaced but incorrect type fitted, fouling caliper bracket |1.1.21 |c|| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Rear reflector on motorcycle obscured |1.4.2b| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Handlebar deformed to the extent that steering is affected bent (2.2.1 (c) (ii)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Stop lamp not working Front and rear lever (4.3.1 (a) (ii)) | 1 |
| Fuel system component leaking (6.1.3 (b) (i)) | 1 |
| Offside Front Direction indicator lens defective such that the emitted light is adversely affected (4.4.1 (b) (ii)) | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Headlamp light source and lamp not compatible (4.1.4 (c)) | 1 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Central Rear Lower Position lamp not working (4.2.1 (a)) | 1 |
| Front Brake lever is bent and the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Offside Rear Footrest insecure (6.2.12 (a)) | 1 |
| Offside Front Footrest insecure (6.2.12 (a)) | 1 |
| Rear Brake back plate insecure locking device missing from torque arm (1.1.14 (d)) | 1 |
| Rear Stop lamp not working works intermitant (faulty brake switch) (4.3.1 (a) (ii)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Front Upper Brake lever is bent and the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Front Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Offside Handlebar fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Headlamp aim not tested insecure headlight (4.1.2 (b)) | 1 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Throttle operating incorrectly choke switch gear insecure affecting throttle (6.2.7 (a) (i)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected throttle effected by steering bike |6.2.7 |a| |ii|| | 1 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Handlebar deformed to the extent that steering is affected |2.2.1 |c| |ii|| | 1 |
| Drive chain worn to excess tight spots |6.1.7 |c| |i|| | 1 |
| Rear Brake pedal has insufficient reserve travel fouling exhaust (1.1.2 (a)) | 1 |
| Rear Stop lamp not working brake (4.3.1 (a) (ii)) | 1 |
| Brake pedal is bent and the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Offside Footrest missing pillion (6.2.12 (a)) | 1 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| 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 excessively tight (6.1.7 (k) (i)) | 1 |
| Offside Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Nearside Rear Exhaust silencer likely to become detached |8.1.1 |b| |ii|| | 1 |
| Nearside Rear Brake component insecure |1.1.21 |c|| | 1 |
| Nearside Front Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Nearside Front Throttle control functioning such that safe operation of the motorcycle is adversely affected |6.2.7 |a| |ii|| | 1 |
| Central Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Brake master cylinder leaking (1.1.10 (b) (ii)) | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |