| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 68 |
| Registration plate issues | 29 |
| Rear reflector on motorcycle missing |1.4.1| | 27 |
| Registration plate lamp issues | 22 |
| Drive chain excessively loose |6.2.1d| | 18 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 16 |
| Horn not working |1.7.3a| | 15 |
| Rear reflector missing (4.8.2 (a) (ii)) | 13 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 11 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 10 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 10 |
| Drive chain worn to excess |6.2.1e| | 10 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 8 |
| Drive chain excessively tight |6.2.1d| | 7 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Horn not working |7.7 |a| |ii|| | 6 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 5 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 5 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 5 |
| Throttle operating incorrectly |6.2.1f| | 5 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 5 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Handlebar deformed |2.1.1b| | 4 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Horn not working (7.7 (a) (ii)) | 4 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| 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|| | 3 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Upper Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Stop lamp remains on when the brakes are released | 3 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 3 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 3 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 3 |
| Rear Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 3 |
| Brake performance not tested (1.2.1 (g)) | 3 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Rear Brake excessively binding (1.2.1 (f)) | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Rear All direction indicators obviously incorrectly positioned (4.4.3 (a)) | 2 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 2 |
| Rear reflector on sidecar missing |1.4.1| | 2 |
| Rear Position lamp not working |4.2.1 |a|| | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Rear Brake hose leaking fluid |3.2.B4| | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Front Position lamp not working |4.2.1 |a|| | 2 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 2 |
| Horn control defective |1.7.2a| | 2 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Headlamp aim not tested (4.1.2 (b)) | 2 |
| Offside Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Rear Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 2 |
| 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| | 2 |
| Offside Rear Footrest insecure stiff (6.2.12 (a)) | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Handlebar excessively deformed (2.2.1 (c) (i)) | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Front position lamp incorrect colour |1.1.2a| | 2 |
| Handlebar fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 2 |
| Headlamp insecure |1.2.3b| | 2 |