| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 87 |
| Registration plate lamp issues | 29 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 28 |
| Drive chain excessively loose |6.2.1d| | 28 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 24 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 19 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 17 |
| Registration plate issues | 16 |
| Rear reflector on motorcycle missing |1.4.1| | 15 |
| Handlebar deformed |2.1.1b| | 11 |
| Drive chain worn to excess |6.2.1e| | 9 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 8 |
| Rear reflector on motorcycle obscured |1.4.1| | 7 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 6 |
| Rear reflector missing (4.8.2 (a) (ii)) | 6 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 5 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Drive chain excessively tight |6.2.1d| | 5 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 5 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 5 |
| Horn not working |1.7.3a| | 5 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Front Brake excessively binding (1.2.1 (f)) | 4 |
| Front Brake excessively binding |1.2.1 |f|| | 4 |
| Rear Drive chain excessively loose |6.2.1d| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 4 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Stop lamp remains on when the brakes are released | 4 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Exhaust excessively deteriorated |7.1.1a| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Brake pedal cannot be released smoothly |3.1.3d| | 3 |
| Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 3 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Front mudguard insecure |2.3.7| | 3 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Front Front mudguard insecure |2.3.7| | 2 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 2 |
| Handlebar mounting insecure |2.2.1 |a| |i|| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 2 |
| Dipswitch does not operate immediately when selected on dipped beam |4.1.3 |b|| | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear Stop lamp switch with a delay in operation |4.3.2 |a| |ii|| | 2 |
| Rear Brake locking device missing |3.2.A1e| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 2 |
| Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Headlamp aim not tested (4.1.2 (b)) | 2 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Rear Position lamp not working |4.2.1 |a|| | 2 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 2 |
| Offside Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Rear reflector on motorcycle obscured |1.4.2b| | 2 |
| Rear Brake locking device insecure |3.2.A1e| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Handlebar excessively deformed (2.2.1 (c) (i)) | 2 |
| Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Front Front position lamp damaged and function impaired |1.1.1b| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 2 |
| Rear Brake excessively binding |1.2.1 |f|| | 2 |