| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 25 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 8 |
| Stop lamp remains on when the brake is released |1.3.1e| | 8 |
| Drive chain excessively loose |6.2.1d| | 8 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 6 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 6 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Front wheel bearings have excessive free play |2.3.5b| | 6 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 5 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 4 |
| Riders seat insecure |6.2.1a| | 4 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Offside Rear Brake pedal cannot be released smoothly |3.1.3d| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Rear reflector on motorcycle missing |1.4.1| | 3 |
| Registration plate issues | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Fuel hose leaking |7.2.1a| | 3 |
| Rear Wheel corroded significantly reducing the original strength |4.2.1a| | 3 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Offside Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Offside Handlebar deformed |2.1.1b| | 2 |
| Nearside Footrest insecure (6.2.12 (a)) | 2 |
| Direction indicator not working |1.5.1c| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Front Wheel spoke excessively loose |4.2.1b| | 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 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear Brake pedal is inoperative |3.1.3c| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear Brake disc|s| cracked |3.2.A1g| | 1 |
| Stop lamp not working When front brake lever applied (4.3.1 (a) (ii)) | 1 |
| Stop lamp does not illuminate immediately a brake applies with front brake applied |1.3.1a| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Offside Front Vehicle identification number not permanently displayed |6.3.5a| | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Lower Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Offside Footrest insecure (6.2.12 (a)) | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Rear mono-shock pivot seized |2.4.B.4| | 1 |
| Rear suspension bearing excessively deteriorated |2.4A.2a|i|| | 1 |
| Indicator switch defective |1.5.4| | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Horn not working |1.7.3a| | 1 |
| Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Front mudguard insecure |2.3.7| | 1 |
| Clutch lever positioned so it cannot be readily operated. (6.2.1g) | 1 |
| Rear reflector on motorcycle missing (1.4.1) | 1 |
| Rear Floor brake test indicates a severely juddering brake |3.3C2d.| | 1 |
| Offside Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Nearside Rear Drive chain excessively tight |6.2.1d| | 1 |
| Nearside Rear Drive chain worn to excess |6.2.1e| | 1 |
| Nearside Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Nearside Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Brake effort inadequate at a wheel Rear lever can be touching handlebar when applied, adjusted rear brake cable. |1.2.1 |a| |i|| | 1 |
| Rear Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Brake pipe inadequately supported |3.2.B2b| | 1 |
| Position lamp switch insecure |1.1.4b| | 1 |
| Headlamp switch insecure |1.2.4| | 1 |
| Rear Wheel spoke excessively loose All SPOKES (5.2.2 (d)) | 1 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Indicator switch does not operate the direction indicators on the side selected |1.5.4| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Front Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Rear Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Rear Brake disc contaminated |1.1.14 |b|| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Stop lamp not working front lever |4.3.1 |a| |ii|| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Fuel cap does not fasten securely by a positive means |7.2.2b| | 1 |
| Front Stop lamp remains on when the brake is released Switch sticking on. |1.3.1e| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Brake performance not tested (1.2.1 (g)) | 1 |
| Offside Rear Brake caliper inadequately mounted (1.1.16 (c) (i)) | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Direction indicator missing front and rear |1.5.1a| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Front Wheel spoke excessively bent |4.2.1b| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Brake disc|s| excessively pitted |3.2.A1l| | 1 |
| Rear Brake disc|s| excessively pitted |3.2.A1l| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |