| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 47 |
| Registration plate issues | 36 |
| Rear reflector on motorcycle missing |1.4.1| | 35 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 11 |
| Rear reflector missing (4.8.2 (a) (ii)) | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Registration plate lamp issues | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Stop lamp remains on when the brakes are released | 4 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Rear reflector missing |4.8.2 |a| |ii|| | 3 |
| Horn not working |1.7.3a| | 3 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Rear fog lamp tell tale not working |1.3.1b| | 2 |
| Parking brake lever has no reserve travel |3.1.6b| | 2 |
| Rear parking brake recording little or no effort | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 2 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Stop lamp does not emit a steady light |1.3.1b| | 2 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Offside Rear Lower Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Exhaust markings indicating not for road use or similar wording (6.1.2 (c)) | 1 |
| Rear Exhaust markings indicating not for road use or similar wording (6.1.2 (c)) | 1 |
| Rear fog lamp not working |1.3.2b| | 1 |
| Nearside Rear reflector missing |1.5.1a| | 1 |
| Headlamps matched pair are not the same colour |1.7.6| | 1 |
| Nearside Obligatory mirror insecure |8.1.1| | 1 |
| Exhaust system not adequately supported |7.1.1| | 1 |
| Offside Rear Leaf spring shackle bracket loose |2.4.B.6a| | 1 |
| Parking brake: efficiency below requirements |3.7.C.1b| | 1 |
| Hazard warning tell tale not working correctly |1.4.B.1e| | 1 |
| Exhaust markings indicating not for road use or similar wording (7.1.4) | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Front Brake pipe union leaking fluid caliper bleed nipple weeping |3.2.B4| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Rear All direction indicators obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Fuel tank insecure (6.1.3 (a) (i)) | 1 |
| Hazard warning switch missing |1.4.B.1d| | 1 |
| Offside Front Headlamp not working on dipped beam |1.7.5a| | 1 |
| Offside Front Upper Throttle operating incorrectly throttle sticking on end cap - replaced with suitable end caps that did not impede throttle control. (6.2.7 (a) (i)) | 1 |
| Front position lamp does not illuminate immediately when switched on side light |1.1.3a| | 1 |
| Nearside Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Front Fork yoke insecure |2.2.2 |d| |i|| | 1 |
| Rear Stop lamp not working rear brake (4.3.1 (a) (ii)) | 1 |
| Rear Brake pipe connection leaking rear brake area (1.1.11 (b)) | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Front Wheel inadequatly repaired significantly reducing the original strength |4.2.1a| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Brake lever insecure |3.1.2a| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Nearside Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Rear Position lamp not working |4.2.1 |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 |
| Front Brake fluid reservoir fluid level significantly below minimum level (1.1.10 (d) (ii)) | 1 |
| Rear Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 1 |
| Brake lever has insufficient reserve travel |1.1.2 |a|| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Offside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 1 |
| Headlamp aim headlamp deteriorated and function impaired Incorrect bulbs, not bright enough to put a beam pattern on beam tester sufficiently |1.2.3a| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Throttle operating incorrectly sticking |6.2.1f| | 1 |
| Nearside Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Handlebar retaining device loose (2.2.1 (b) (i)) | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Stop lamp light intensity significantly reduced (4.3.3 (a) (ii)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Nearside Front Brake lining(s) contaminated (1.1.13 (b)) | 1 |
| Nearside Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Rear position lamp missing |1.1.1a| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Dipswitch does not operate immediately when selected on main beam (4.1.3 (b)) | 1 |
| Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 1 |
| Rear reflector on sidecar missing |1.4.1| | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |