| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 13 |
| Registration plate issues | 6 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Horn not working (7.7 (a)) | 2 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Stop lamp does not illuminate immediately a brake applies both |1.3.1a| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Horn not working |1.7.3a| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 1 |
| Front Gradient brake test indicates a binding brake |3.3.D1c| | 1 |
| Rear suspension bush has excessive free play rear lower link bush |2.4.A2a|i|| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride sprocket and nuts loose |6.2.1h| | 1 |
| Front Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride brake disc |6.2.1h| | 1 |
| Fuel system component insecure carb loose |7.2.1b| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride both chain adjusters |6.2.1h| | 1 |
| Drive chain excessively loose |6.2.1d| | 1 |
| Drive chain sprocket carrier worn to excess carrier bearing excessive play |6.2.1e| | 1 |
| Nearside Rear shock absorber insecurely mounted top |2.4.A.3b| | 1 |
| Nearside Handlebar mounting clamp loose |2.1.1a| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear suspension bush has excessive free play swinging link |2.4.A2a|i|| | 1 |
| Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Drive chain excessively tight, so that it is likely to fail chain has tight spots |6.1.7 |k| |ii|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Roller brake test brake efficiency less than 27.5% overall |1.2.2 |a| |ii|| | 1 |
| Rear Brake lever has abnormal movement of levers indicating excessive wear or maladjustment |1.1.15 |f|| | 1 |
| Front Chain guard insecure front sprocket cover missing |6.1.7 |i|| | 1 |
| Fuel system component leaking |6.1.3 |b| |i|| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front position lamp missing |1.1.1a| | 1 |
| Registration plate lamp issues | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Rear Brake rod insecure |1.1.15 |c|| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Front Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Suspension arm ball joint excessively worn |5.3.4 |a| |i|| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Front Wheel spindle or securing nut|s| so insecure that wheel security or steering control is adversely affected s/pin missing |5.2.1 |c| |ii|| | 1 |
| Rear Wheel spindle or securing nut|s| so insecure that wheel security or steering control is adversely affected s/pin missing |5.2.1 |c| |ii|| | 1 |
| Front Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Dipswitch does not operate immediately when selected on dipped beam |4.1.3 |b|| | 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 |
| Nearside Direction indicator not working not flashing |4.4.1 |a| |ii|| | 1 |
| Offside Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Rear Footrest missing Rear Pillion footrests missing (6.2.12 (a)) | 1 |
| Wheel alignment incorrect which adversely affects the handling Wheels out of alignment (2.4 (a)) | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Front Headlamp light source and lamp not compatible (4.1.4 (c)) | 1 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Rear Wheel excessively distorted (5.2.2 (c) (i)) | 1 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Exhaust has a major leak of exhaust gases front exhaust section leaking (6.1.2 (a)) | 1 |
| Exhaust system insecure front exhaust section insecure (6.1.2 (a)) | 1 |
| Rear Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 1 |
| Front Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 1 |
| Rear Wheel more than one fixing missing (5.2.1 (a) (ii)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Brake lever insecure (1.1.2 (e) (i)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| All direction indicators not working Indicators need battery connected to work (4.4.1 (a) (ii)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Offside Handlebar grip insecure to handlebar switch gear (2.2.1 (d) (ii)) | 1 |
| Offside Rear Footrest insecure (6.2.12 (a)) | 1 |
| Brake excessively binding (1.2.1 (f)) | 1 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected engine revs up on left turn (6.2.7 (a) (ii)) | 1 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Brake lever has restricted free movement Loose bolt adjusted (1.1.15 (e)) | 1 |
| Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 1 |
| Wheel spindle locking device missing (5.2.1 (d)) | 1 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls front lever (4.3.2 (a) (iii)) | 1 |
| Rear Suspension arm pin or bush excessively worn swing arm (5.3.4 (a) (i)) | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| All direction indicators adversely affected by the operation of another lamp (4.4.3 (b)) | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Rear Drive chain sprocket excessively loose (6.1.7 (c) (i)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected throttle operating when on full right hand lock (6.2.7 (a) (ii)) | 1 |
| Rear Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 1 |