| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 36 |
| Registration plate issues | 18 |
| Rear reflector on motorcycle missing |1.4.1| | 16 |
| Rear reflector missing (4.8.2 (a) (ii)) | 10 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Exhaust noise is clearly in excess of that emitted by a similar motor bicycle fitted with a standard silencer in average condition |7.1.2| | 8 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 5 |
| Stop lamp remains on when the brakes are released | 5 |
| Rear reflector missing |4.8.2 |a| |ii|| | 5 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Horn not working (7.7 (a)) | 4 |
| Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 3 |
| Horn not working |1.7.3a| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Rear Brake master cylinder fluid level dangerously low |3.2.B1d| | 2 |
| Front Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| 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|| | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Rear Position lamp not working |4.2.1 |a|| | 2 |
| Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Rear Brake fluid reservoir fluid level significantly below minimum level (1.1.10 (d) (ii)) | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Rear Suspension arm ball joint excessively worn swing arm |5.3.4 |a| |i|| | 1 |
| Rear Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Central Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Fuel pipe damaged tank to manifold |6.1.3 |c| |ii|| | 1 |
| Brake performance unable to be tested (1.2.1 (g)) | 1 |
| Rear Brake caliper inadequately mounted (1.1.16 (c) (i)) | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Fuel cap leaking Seal perrished (6.1.3 (b) (i)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls Front brake light switch not working (4.3.2 (a) (iii)) | 1 |
| Rear Exhaust system insecure |6.1.2 |a|| | 1 |
| Front Stop lamp remains on when the brake is released front switch stuck on |1.3.1e| | 1 |
| Central Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Nearside Front Direction indicator incorrect colour (4.4.3 (a)) | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Drive belt so worn it is likely to fail Drive belt teeth lifting (6.1.7 (c) (ii)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Front Steering headbearing in such a condition that steering control is adversely affected not smooth |2.2.2 |f| |ii|| | 1 |
| Exhaust has a major leak of exhaust gases Front exhaust blowing |6.1.2 |a|| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Offside Rear Suspension arm ball joint excessively worn |5.3.4 |a| |i|| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Front Headlamp insecure (4.1.1 (c)) | 1 |
| Brake performance unable to be tested front pads worn out (1.2.1 (g)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Stop lamp missing |1.3.3a| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Nearside Rear Suspension arm ball joint excessively worn |5.3.4 |a| |i|| | 1 |
| Front Stop lamp does not emit a steady light dry lever sticking rear light |1.3.1b| | 1 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Brake performance unable to be tested Rear pads on metal (1.2.1 (g)) | 1 |
| Rear reflector likely to become detached (4.8.1 (b) (ii)) | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Offside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Suspension rod attachment bracket/mounting insecure (5.3.3 (a) (i)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Throttle operating incorrectly sticks on with handlebars turned fully to the right (6.2.7 (a) (i)) | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Front Brake fluid reservoir fluid level significantly below minimum level (1.1.10 (d) (ii)) | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Centre Rear Rear reflector on sidecar missing |1.4.1| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Offside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Stop lamp switch with a delay in operation |4.3.2 |a| |ii|| | 1 |