| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 47 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 26 |
| Registration plate issues | 21 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 18 |
| Registration plate lamp issues | 18 |
| Front Brake excessively binding (1.2.1 (f)) | 15 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 14 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 12 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 12 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 11 |
| Front Brake excessively binding |1.2.1 |f|| | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 8 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 7 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 7 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 5 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 5 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 5 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| 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| | 4 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 4 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 4 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 3 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 3 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 3 |
| Drive chain excessively loose |6.2.1d| | 3 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 3 |
| Stop lamp not working |4.3.1 |a| |ii|| | 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 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Horn not working |1.7.3a| | 3 |
| Offside Front Brake disc|s| is excessively distorted |3.2.A1m| | 3 |
| Front Valve stem seriously damaged |5.2.3 |j|| | 3 |
| Front brake disc in such a condition that it is seriously weakened | 3 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 3 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Front Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 3 |
| Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 3 |
| Horn not working (7.7 (a)) | 3 |
| Rear Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Nearside Front Brake excessively binding |1.2.1 |f|| | 2 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| Throttle operating incorrectly |6.2.7 |a| |i|| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Nearside Front Brake disc|s| is excessively distorted |3.2.A1m| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Brake lever has insufficient reserve travel (1.1.2 (a)) | 2 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Brake performance not tested (1.2.1 (g)) | 2 |
| Nearside Handlebar fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 2 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Offside Front Brake disc contaminated (1.1.14 (b)) | 2 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |