| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 33 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 22 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 11 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 7 |
| Drive chain excessively loose |6.2.1d| | 6 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 5 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 5 |
| Registration plate lamp issues | 4 |
| Horn not working |1.7.3a| | 4 |
| Rear Brake disc|s| cracked |3.2.A1g| | 4 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Registration plate issues | 3 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 3 |
| Rear Brake lagging in operation (1.2.1 (d)) | 3 |
| Rear Brake excessively binding (1.2.1 (f)) | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 2 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Rear Position lamp not working |4.2.1 |a|| | 2 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Rear Brake disc|s| is excessively distorted |3.2.A1m| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Offside Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 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 |
| Horn not working (7.7 (a)) | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Horn sound not in accordance with requirements |7.7 |c|| | 1 |
| Steering operation restricted in free movement from lock to lock |2.1.4 |c|| | 1 |
| Offside Rear Lower Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Offside Front Lower Shock absorber insecurely attached lower pinch bolt missing |5.3.2 |a| |i|| | 1 |
| Offside Rear Lower Stop lamp not working rear brake light not illuminating when brake pressed - adjusted and lubed to correct. (4.3.1 (a) (ii)) | 1 |
| Rear Steering linkage locking device ineffective |2.1.3 |d|| | 1 |
| Stop lamp not working Front & Rear |4.3.1 |a| |ii|| | 1 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Fuel cap ineffective Fuel cap doesnt seal to tank (6.1.3 (b) (i)) | 1 |
| Nearside Handlebar handgrip not secure to handlebars. grip moves on bar |2.1.1c| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Rear Brake fluid contaminated (1.8 (a)) | 1 |
| Front Brake fluid contaminated (1.8 (a)) | 1 |
| Valve stem seriously damaged Rear (5.2.3 (j)) | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Handlebar fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 1 |
| Nearside Front Position lamp not working |4.2.1 |a|| | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Front Wheel more than one fixing loose |5.2.1 |a| |ii|| | 1 |
| Offside Rear Exhaust mounting does not fully support the exhaust system silencer clamp broken |7.1.1.c| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Headlamp aim projected beam image obviously incorrect New bulb fitted (4.1.2 (c)) | 1 |
| Steering headbearing has excessive wear or free play notchy |2.2.2 |f| |i|| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Stop lamp not working front and rear (4.3.1 (a) (ii)) | 1 |
| Stop lamp not working foot brake (4.3.1 (a) (ii)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Steering operation linkage fouling when handlebars turned from lock to lock (2.1.4 (a)) | 1 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Dipswitch does not operate immediately when selected on main beam (4.1.3 (b)) | 1 |
| Nearside Front Shock absorber missing |5.3.2 |a| |ii|| | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Exhaust has part of the system missing Exhaust clamps deteriorated. |7.1.1a| | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Nearside Front Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Front Brake pipe inadequately supported |3.2.B2b| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Front shock absorber seal failed and leaking oil NS leg |2.3.3| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Nearside Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Motorcycle structure joining/attachment plate or fastening insecure gear selector (6.1.1 (b) (i)) | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Motorcycle structure corroded to the extent that the rigidity of the assembly is significantly reduced (6.1.1 (c) (i)) | 1 |
| Rear Brake caliper inadequately mounted and braking performance affected (1.1.16 (c) (ii)) | 1 |
| Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Front wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Front wheel spindle loose |2.3.3a| | 1 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 1 |
| Front Stop lamp not working front switch (4.3.1 (a) (ii)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak fork seal blown (5.3.2 (b)) | 1 |
| Offside Front Shock absorber has a serious fluid leak fork seal blown (5.3.2 (b)) | 1 |
| Windscreen wiper does not clear the windscreen effectively | 1 |
| Nearside Stop lamp not working |1.2.1b| | 1 |
| Offside Front Anti-roll bar rubber bush bonding deteriorated resulting in excessive movement |2.4.G.2| | 1 |
| Nearside Front Anti-roll bar rubber bush bonding deteriorated resulting in excessive movement |2.4.G.2| | 1 |
| Exhaust emits an excessive level of metered smoke for a turbo charged engine |7.4.B.3b| | 1 |
| Parking brake lever has no reserve travel |3.1.6b| | 1 |
| Brake pipe excessively corroded | 1 |
| Parking brake: efficiency below requirements |3.7.B.7| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Nearside Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Front Brake excessively binding wheel spacing wrong (1.2.1 (f)) | 1 |