| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 34 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 12 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 10 |
| Registration plate lamp issues | 8 |
| Rear reflector missing (4.8.2 (a) (ii)) | 8 |
| Rear Brake excessively binding (1.2.1 (f)) | 8 |
| Horn not working (7.7 (a)) | 7 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 6 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 6 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 5 |
| Rear Position lamp not working (4.2.1 (a)) | 5 |
| Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Registration plate issues | 5 |
| Front Brake excessively binding (1.2.1 (f)) | 4 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 3 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 3 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 2 |
| Front Horn not working (7.7 (a)) | 2 |
| Nearside Rear Drive chain excessively tight (6.1.7 (k) (i)) | 2 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Fork yoke insecure Top fork stem nut loose (2.2.2 (d) (i)) | 1 |
| Brake lagging in operation (Spongy) (1.2.1 (d)) | 1 |
| Rear Brake cylinder operating mechanism has excessive travel (1.1.16 (e) (i)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Front Upper Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Front Wheel bearing has excessive play plus rough when rotated (5.1.3 (a) (i)) | 1 |
| Front Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Stop lamp not working control 1 (4.3.1 (a) (ii)) | 1 |
| Headlamp aim projected beam image obviously incorrect LED bulb fitted to halogen lamp causing incorrect image. (4.1.2 (c)) | 1 |
| Front Wheel excessively distorted (5.2.2 (c) (i)) | 1 |
| Rear Brake pedal insecure (1.1.2 (e) (i)) | 1 |
| Offside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Exhaust system insecure (6.1.2 (a)) | 1 |
| Nearside Brake hose excessively damaged under tank (1.1.12 (b) (ii)) | 1 |
| Steering operation fouling on the fuel tank or bodywork on full lock handguards adjusted to clear windshield (2.1.4 (b)) | 1 |
| Front Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Brake pedal not releasing correctly and functionality of brakes affected fouling exhaust (1.1.2 (b) (ii)) | 1 |
| Rear Brake master cylinder insecure (1.1.10 (c)) | 1 |
| Fuel cap ineffective (6.1.3 (b) (i)) | 1 |
| Offside Front Direction indicator not working This indicator is damaged . (4.4.1 (a) (ii)) | 1 |
| Headlamp reflector missing (4.1.1 (b) (ii)) | 1 |
| Handlebar fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Central Front Upper Fork yoke insecure (2.2.2 (d) (i)) | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Nearside Rear Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Wheel spindle loose (5.2.1 (c) (i)) | 1 |
| Steering operation linkage fouling when handlebars turned from lock to lock (2.1.4 (a)) | 1 |
| Throttle operating incorrectly sticking and insecure (6.2.7 (a) (i)) | 1 |
| Offside Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Brake pedal is bent and the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Stop lamp not working from front brake (4.3.1 (a) (ii)) | 1 |
| Front Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Front Upper Brake hose leaking (1.1.12 (c)) | 1 |
| Front Brake performance unable to be tested (1.2.1 (g)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Fork yoke insecure Top nut loose (2.2.2 (d) (i)) | 1 |
| Offside Front Brake lever has insufficient reserve travel better when pumped so possible air in system (1.1.2 (a)) | 1 |
| Front Wheel excessively distorted o/s bead rim (5.2.2 (c) (i)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Nearside Front Handlebar restricted in free movement from lock to lock (2.1.4 (c)) | 1 |
| Offside Front Handlebar restricted in free movement from lock to lock (2.1.4 (c)) | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 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 |
| Fork yoke insecure (2.2.2 (d) (i)) | 1 |
| Stop lamp not working from front or rear control (4.3.1 (a) (ii)) | 1 |
| Position lamp not working (4.2.1 (a)) | 1 |
| All position lamps not working (4.2.1 (a)) | 1 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Rear Brake has no recorded effort at a wheel (1.2.1 (a) (ii)) | 1 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Sidecar structure joining/attachment plate or fastening insecure (6.1.1 (b) (i)) | 1 |
| Nearside Rear Suspension arm attachment bracket/mounting insecure (5.3.3 (a) (i)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls Not working from rear brake (4.3.2 (a) (iii)) | 1 |
| Nearside Front Lower Fork yoke insecure bolt broken in lower clamp (2.2.2 (d) (i)) | 1 |
| Handlebar mounting insecure (2.2.1 (a) (i)) | 1 |
| Offside Front Shock absorber insecurely attached (5.3.2 (a) (i)) | 1 |
| Rear Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Rear Footrest missing (6.2.12 (a)) | 1 |
| Offside All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Rear Rear reflector missing Replaced PRS (4.8.2 (a) (ii)) | 1 |
| Brake linkage has abnormal movement of levers indicating excessive wear or maladjustment rear brake pedal linkage insecure (1.1.15 (f)) | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Front Brake lever has restricted free movement (1.1.15 (e)) | 1 |
| Front Steering headbearing excessively stiff or notchy excessive wear (2.2.2 (f) (i)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Rear Suspension component modified so the suspension is inoperative no movement (5.3.3 (c) (ii)) | 1 |
| Exhaust silencer insecure (8.1.1 (b) (i)) | 1 |