| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 48 |
| Front Brake excessively binding (1.2.1 (f)) | 32 |
| Registration plate lamp issues | 21 |
| Stop lamp remains on when the brakes are released | 14 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 13 |
| Horn not working (7.7 (a)) | 12 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 10 |
| Rear Brake excessively binding (1.2.1 (f)) | 10 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 9 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 9 |
| Rear Brake lever has insufficient reserve travel (1.1.2 (a)) | 9 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 7 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 6 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 6 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 6 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 6 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 6 |
| Rear Brake has no recorded effort at a wheel (1.2.1 (a) (ii)) | 5 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 4 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 4 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 4 |
| Rear Brake grabbing severely (1.2.1 (c)) | 4 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 4 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Front Brake grabbing severely (1.2.1 (c)) | 3 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 2 |
| Rear Brake lagging in operation (1.2.1 (d)) | 2 |
| Registration plate issues | 2 |
| Front Position lamp not working (4.2.1 (a)) | 2 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Position lamp not working (4.2.1 (a)) | 2 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 2 |
| Front Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 2 |
| Horn sound not in accordance with requirements (7.7 (c)) | 2 |
| Riders seat insecure (6.2.5 (a) (ii)) | 2 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Front Wheel bearing rough when rotated also slight free play (5.1.3 (b) (i)) | 1 |
| Nearside Position lamp switch does not illuminate all position lamps with a single operation Sticking badly! (4.2.2 (a)) | 1 |
| Nearside Rear Brake has no recorded effort at a wheel No Braking Effort until Rear Brake was adjusted. (1.2.1 (a) (ii)) | 1 |
| Rear Brake lever pivot has excessive free play (1.1.1 (b)) | 1 |
| Headlamp incorrect colour (4.1.4 (a)) | 1 |
| Brake lining(s) less than 1.0 mm thick (1.1.13 (a)) | 1 |
| Nearside Stop lamp does not illuminate by the operation of both brake controls n/s brake lever does illuminate the brake lights (4.3.2 (a) (iii)) | 1 |
| Front Horn not working (7.7 (a)) | 1 |
| Motorcycle structure joining/attachment plate or fastening so insecure that structural rigidity is seriously reduced (6.1.1 (b) (ii)) | 1 |
| Nearside Stop lamp does not illuminate by the operation of both brake controls Switch stuck. Freed during test. (4.3.2 (a) (iii)) | 1 |
| Rear Wheel fixing missing (single fixing) (5.2.1 (a) (ii)) | 1 |
| Wheel alignment incorrect which adversely affects the handling Wheelbase is 2 inches shorter than standard. (2.4 (a)) | 1 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Nearside Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Steering operation restricted in free movement from lock to lock hand guards (2.1.4 (c)) | 1 |
| Rear Brake lever pivot has excessive free play back brake comes back to handle bar (1.1.1 (b)) | 1 |
| Brake performance not tested (1.2.1 (g)) | 1 |
| Engine mounting/bracket damaged or deteriorated resulting in excessive movement (6.1.8 (a) (i)) | 1 |
| Rear Suspension arm mounting has an unsafe modification (5.3.3 (c) (i)) | 1 |
| Rear Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 1 |
| Central Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Offside Rear Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Offside Rear Footrest missing (6.2.12 (a)) | 1 |
| Exhaust has a major leak of exhaust gases snapped close to head (6.1.2 (a)) | 1 |
| Rear Wheel hub worn to the extent that wheel security is adversely affected wheel nut loose (5.2.1 (b) (ii)) | 1 |
| Front Headlamp light intensity severely reduced bulb loose (4.1.4 (a)) | 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 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Central Front Brake excessively binding (1.2.1 (f)) | 1 |
| Rear Stop lamp not working brake lever (4.3.1 (a) (ii)) | 1 |
| Nearside Rear Upper Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Nearside Brake lever is bent and the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Steering headbearing excessively stiff or notchy notchy (2.2.2 (f) (i)) | 1 |
| Front Brake has no recorded effort at a wheel (1.2.1 (a) (ii)) | 1 |
| Roller brake test brake efficiency less than 27.5% overall (1.2.2 (a) (ii)) | 1 |
| Front Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Riders seat insecure seat tub not bolted in (6.2.5 (a) (ii)) | 1 |
| Front Fork yoke fractured (2.2.2 (d) (i)) | 1 |
| Front Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 1 |
| Front Fork yoke in such a condition that steering control is adversely affected mudguard rubbing when turning (2.2.2 (d) (ii)) | 1 |
| Rear Stop lamp does not illuminate by the operation of both brake controls brake control (4.3.2 (a) (iii)) | 1 |
| Front Brake disc contaminated with fork oil (1.1.14 (b)) | 1 |
| Nearside Rear Brake effort inadequate at a wheel to much travel on lever (1.2.1 (a) (i)) | 1 |
| Central Front Horn not working (7.7 (a)) | 1 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Stop lamp not working nearside brake lever (4.3.1 (a) (ii)) | 1 |
| Rear Brake indicates excessive fluctuation of brake effort linked brake system (1.2.1 (e)) | 1 |
| Front Forks in such a condition that steering control is adversely affected (2.2.2 (d) (ii)) | 1 |
| Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Front Forks insecure (2.2.2 (d) (i)) | 1 |
| Brake performance unable to be tested Decelerometer test not performed because of severe front brake fluctuation and wet roads. (1.2.1 (g)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Brake performance unable to be tested (1.2.1 (g)) | 1 |
| Nearside Front Brake lever is bent and the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Nearside Front Brake lever insecure (1.1.2 (e) (i)) | 1 |
| Offside Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Stop lamp emits other than a steady red light From front brake control (4.3.3 (a) (ii)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Central Rear Position lamp not working (4.2.1 (a)) | 1 |
| Central Rear Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Central Rear 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 |
| Offside Front Headlamp has more than 1/2 LEDs not functioning (4.1.1 (a) (ii)) | 1 |
| Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Rear Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Offside Front Brake lever has restricted free movement (1.1.15 (e)) | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Rear Stop lamp not working BRAKE LIGHT NOT WORKING ON APPLICATION OF REAR BRAKE (4.3.1 (a) (ii)) | 1 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Rear Stop lamp emits other than a steady red light (4.3.3 (a) (ii)) | 1 |
| Nearside Rear Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Suspension component pin or bush excessively worn engine bushes (5.3.4 (a) (i)) | 1 |
| Nearside Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Front Brake disc fractured (1.1.14 (a) (ii)) | 1 |
| Front All position lamps not working (4.2.1 (a)) | 1 |
| Front Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 1 |
| Rear Brake cable has restricted free movement (1.1.15 (e)) | 1 |