| Most common failures | No# failures |
|---|
| Registration plate issues | 51 |
| Rear reflector on motorcycle missing |1.4.1| | 42 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 16 |
| Headlamp aim out of alignment | 15 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 14 |
| Rear reflector missing (4.8.2 (a) (ii)) | 12 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Horn not working |1.7.3a| | 10 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Horn missing |1.7.1| | 7 |
| Registration plate lamp issues | 6 |
| Front Stop lamp missing |1.3.3a| | 5 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Drive chain excessively loose |6.2.1d| | 5 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Horn not working (7.7 (a)) | 4 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Rear reflector missing |4.8.2 |a| |ii|| | 4 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 3 |
| Chain guard fouling another component |6.2.1c| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Central Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Front Wheel spoke excessively loose (5.2.2 (d)) | 2 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 2 |
| Front Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 2 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Front Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Front Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Exhaust markings indicating not for road use or similar wording (6.1.2 (c)) | 1 |
| Rear Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Headlamp aim not tested |4.1.2 |b|| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Suspension component modified so the suspension is inoperative seized |5.3.3 |c| |ii|| | 1 |
| Front Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Front Stop lamp not working brake (4.3.1 (a) (ii)) | 1 |
| Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 1 |
| Dipswitch does not operate immediately when selected on main beam (4.1.3 (b)) | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Central Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Direction indicator missing |1.5.1a| | 1 |
| Front Wheel spoke excessively loose (4.2.1b) | 1 |
| Footrest insecure SPLIT PIN FITTED (6.2.12 (a)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Brake fluid significantly below minimum mark (1.1.10 (d) (ii)) | 1 |
| Stop lamp missing |1.3.3a| | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Central Rear Lower Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Stop lamp switch with a delay in operation switch missing (4.3.2 (a) (ii)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls front stop switch inoperative (4.3.2 (a) (iii)) | 1 |
| Brake master cylinder leaking appears to be leaking out of the hydraulic stop lamp switch (1.1.10 (b) (ii)) | 1 |
| Rear Position lamp not working rear light goes out when high beam is selected (4.2.1 (a)) | 1 |
| Rear Stop lamp missing |1.3.3a| | 1 |
| Direction indicator missing |1.5.1a| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Rear Brake disc|s| securing bolt|s| missing |3.2.A1g| | 1 |
| Fuel cap sealing washer missing |7.2.2c| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Headlamp damaged and function impaired |1.2.3a| | 1 |
| Centre Rear Lower Rear suspension bearing has excessive free play AT THE LINK ARM |2.4.A2a|i|| | 1 |
| Offside Rear Lower Brake pedal attachment screws loose |3.1.2b| | 1 |
| Clutch lever bent so it cannot be readily operated. |6.2.1g| | 1 |
| All direction indicators missing |4.4.1 |a| |ii|| | 1 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Rear Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Suspension arm ball joint excessively worn (5.3.4 (a) (i)) | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Front shock absorber seal failed and leaking oil both forks |2.3.3| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Headlamp light intensity severely reduced head lamp flashing when engine running (4.1.4 (a)) | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Stop lamp does not illuminate immediately a brake applies when front brake applied |1.3.1a| | 1 |
| Rear Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Drive chain horseshoe locking device likely to become detached |6.1.7 |j| |ii|| | 1 |
| Rear Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Front Brake caliper insecure (1.1.16 (c) (i)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Rear suspension bearing excessively deteriorated |2.4A.2a|i|| | 1 |
| Rear reflector on motorcycle missing REAR REFLECTOR MISSING |1.4.1| | 1 |
| Stop lamp does not illuminate by the operation of both brake controls not working on front control (4.3.2 (a) (iii)) | 1 |
| Headlamp aim not tested headlamp not dipping type. |4.1.2 |b|| | 1 |
| Nearside Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |