| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 22 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Drive chain excessively loose |6.2.1d| | 9 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 5 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Rear Brake disc|s| cracked |3.2.A1g| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Horn not working |1.7.3a| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Registration plate issues | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Front Stop lamp switch with a delay in operation |4.3.2 |a| |ii|| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Offside Front Brake disc contaminated (1.1.14 (b)) | 2 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Nearside Front Brake disc contaminated (1.1.14 (b)) | 2 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Stop lamp does not illuminate immediately a brake applies front control |1.3.1a| | 1 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Nearside Front Brake excessively binding |1.2.1 |f|| | 1 |
| Offside Brake excessively binding |1.2.1 |f|| | 1 |
| Exhaust noise is clearly in excess of that emitted by a similar motor bicycle fitted with a standard silencer in average condition |7.1.2| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Brake component cracked and seriously reduced in strength |3.2.A1| | 1 |
| Offside Rear wheel bearing rough when rotated |2.6.1| | 1 |
| Nearside Rear Lower Shock absorbers likely to become detached SHOCK ABSORBER BREAKING UP (5.3.2 (a) (ii)) | 1 |
| Offside Rear Lower Shock absorbers likely to become detached SHOCK ABSORBER BREAKING UP (5.3.2 (a) (ii)) | 1 |
| Offside Rear Anti-roll bar linkage insecure |2.4.G.1| | 1 |
| Nearside Rear Outer Drive shaft which forms part of the suspension coupling gaiter damaged to the extent that it no longer prevents the ingress of dirt etc |2.4.G.4e| | 1 |
| Nearside Headlamp not working on dipped beam |1.7.5a| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Stop lamp not working Front lever brake lamp (4.3.1 (a) (ii)) | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Front position lamp incorrect colour both |1.1.2a| | 1 |
| Offside Front Brake caliper leaking (1.1.16 (b) (i)) | 1 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Lower Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Rear Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Direction indicator insecure |1.5.3b| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Offside Rear Brake disc fractured (1.1.14 (a) (ii)) | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Horn not working |7.7 |a| |ii|| | 1 |
| Front Horn not working (7.7 (a) (ii)) | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Central Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Headlamp damaged and function impaired |1.2.3a| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Offside Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Rear Brake disc fractured |1.1.14 |a| |ii|| | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Throttle operating incorrectly rpm rises when on full lock (6.2.7 (a) (i)) | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Nearside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Nearside Front Brake disc significantly and obviously worn |1.1.14 |a| |i|| | 1 |
| Offside Front Brake disc significantly and obviously worn |1.1.14 |a| |i|| | 1 |
| Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Stop lamp does not illuminate immediately a brake applies on front application |1.3.1a| | 1 |
| Offside Rear Drive chain excessively loose drive chain adjuster loose |6.1.7 |c| |i|| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Rear Drive chain sprocket so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Drive chain excessively tight, so that it is likely to fail |6.1.7 |k| |ii|| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Offside Front Brake disc fractured (1.1.14 (a) (ii)) | 1 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Rear suspension bush has excessive free play swing arm play |2.4.A2a|i|| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Headlamp light source and lamp not compatible image kicks-to right (4.1.4 (c)) | 1 |
| Rear Brake caliper inadequately mounted rear brake caliper mounting broken (1.1.16 (c) (i)) | 1 |
| Stop lamp not working with front brake (4.3.1 (a) (ii)) | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Stop lamp does not illuminate immediately a brake applies front brake |1.3.1a| | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Front Brake fluid contaminated (1.8 (a)) | 1 |
| Rear Brake fluid contaminated (1.8 (a)) | 1 |
| Front Stop lamp does not illuminate immediately a brake applies switch damaged |1.3.1a| | 1 |
| Nearside Front Upper Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Nearside Handlebar deformed Handlebars bent |2.1.1b| | 1 |
| Rear brake disc in such a condition that it is seriously weakened | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Nearside Rear Lower Drive chain worn to excess |6.2.1e| | 1 |
| Offside Rear Lower Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Centre Rear Lower Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Exhaust has part of the system missing |7.1.1a| | 1 |