| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 22 |
| Registration plate issues | 7 |
| Registration plate lamp issues | 7 |
| Drive chain excessively loose |6.2.1d| | 7 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 4 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 4 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 4 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Horn not working |1.7.3a| | 3 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |
| Rear suspension component seized |2.4A2a|ii|| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 2 |
| Nearside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 2 |
| Nearside Handlebar deformed |2.1.1b| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Nearside Front Direction indicator insecure |1.5.3b| | 2 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Nearside Handlebar mounting clamp loose |2.1.1a| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front wheel spindle loose |2.3.5a| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Nearside Rear Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Offside Rear Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Rear Brake pedal not releasing correctly and functionality of brakes affected |1.1.2 |b| |ii|| | 1 |
| Exhaust has a major leak of exhaust gases link pipe blowing (6.1.2 (a)) | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Steering operation fouling on the fuel tank or bodywork on full lock brake lever hitting offside mirror when steering left (2.1.4 (b)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Exhaust has a major leak of exhaust gases downpipe to silencer joint loose (6.1.2 (a)) | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Headlamp light intensity severely reduced (4.1.4 (a)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Offside Handlebar mounting clamp loose |2.1.1a| | 1 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride split link wrong way round |6.2.1h| | 1 |
| Nearside Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Handlebar fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Rear Wheel fixing missing (single fixing) split pin missing (5.2.1 (a) (ii)) | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Rear Suspension arm likely to fail excessively stiff[seized] (5.3.3 (b) (ii)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Centre Exhaust excessively deteriorated |7.1.1a| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Front Direction indicators not working very dim |1.5.1c| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Shock absorber has negligible damping effect Rear suspension stiff (5.3.2 (b)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Offside Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Stop lamp not working forward control |4.3.1 |a| |ii|| | 1 |
| Rear Brake pedal has insufficient reserve travel Fouling on exhaust (1.1.2 (a)) | 1 |
| Drive chain excessively tight |6.1.7 |k| |i|| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Offside Front Direction indicator likely to become detached |4.4.1 |c| |ii|| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Front Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Nearside Rear Direction indicator light intensity significantly reduced (4.4.3 (a)) | 1 |
| Nearside Front Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Front Exhaust has a major leak of exhaust gases Exhaust blowing (6.1.2 (a)) | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 1 |
| Nearside Front Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Front Horn is not continous or uniform |1.7.3c| | 1 |
| Front Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Centre Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Nearside Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Nearside Front Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Suspension component pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Rear Shock absorber has an excessively worn bush upper bush (5.3.2 (c)) | 1 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Nearside Drive chain excessively loose |6.2.1d| | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |