| Most common failures | No# failures |
|---|
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 8 |
| Headlamp aim out of alignment | 6 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 3 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 3 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 3 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 3 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| Rear Brake excessively binding (1.2.1 (f)) | 2 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 2 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 2 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 2 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Front Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Rear Wheel spindle loose (5.2.1 (c) (i)) | 1 |
| Nearside Rear Direction indicator incorrect colour (4.4.3 (a)) | 1 |
| Offside Rear Footrest insecure (6.2.12 (a)) | 1 |
| All position lamps not working (4.2.1 (a)) | 1 |
| Front Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Front Footrest insecure (6.2.12 (a)) | 1 |
| Rear Brake pedal is positioned so that the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Exhaust system insecure (6.1.2 (a)) | 1 |
| Front Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Front Horn not working (7.7 (a) (ii)) | 1 |
| Steering operation fouling on the fuel tank or bodywork on full lock fouling both locks (2.1.4 (b)) | 1 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Brake pedal not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Stop lamp not working foot brake control (4.3.1 (a) (ii)) | 1 |
| Front Valve stem seriously damaged perished (5.2.3 (j)) | 1 |
| Rear Valve stem seriously damaged perished (5.2.3 (j)) | 1 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Drive chain sprocket excessively loose Bolt missing and one bolt loose, threads stripped (6.1.7 (c) (i)) | 1 |
| Rear Drive chain sprocket excessively loose (6.1.7 (c) (i)) | 1 |
| Drive chain sprocket worn to excess Carrier bearing (6.1.7 (c) (i)) | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Handlebar retaining device loose (2.2.1 (b) (i)) | 1 |
| Exhaust has a major leak of exhaust gases Manifold Nut/Stud missing (6.1.2 (a)) | 1 |
| Front Steering headbearing in such a condition that steering control is adversely affected (2.2.2 (f) (ii)) | 1 |
| Exhaust silencer likely to become detached (8.1.1 (b) (ii)) | 1 |
| Motorcycle structure modified such that structural rigidity is significantly reduced (6.1.1 (d) (i)) | 1 |
| Wheel spindle locking device missing (5.2.1 (d)) | 1 |
| Offside Rear Wheel spindle or securing nut(s) so insecure that wheel security or steering control is adversely affected wheel spindle locking device missing (5.2.1 (c) (ii)) | 1 |
| Suspension attachment bracket/mounting insecure Upper yoke. (5.3.3 (a) (i)) | 1 |
| Upper Fork yoke insecure Excessive movement, suspect loose centre nut. (2.2.2 (d) (i)) | 1 |
| Rear Brake caliper insecure (1.1.16 (c) (i)) | 1 |
| Nearside Front Footrest insecure (6.2.12 (a)) | 1 |
| Offside Front Footrest insecure (6.2.12 (a)) | 1 |
| Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Throttle operating incorrectly Revving up when on right hand lock (6.2.7 (a) (i)) | 1 |