| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 113 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 47 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 43 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 39 |
| Registration plate issues | 33 |
| Registration plate lamp issues | 32 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 24 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 22 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 21 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 21 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 15 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 14 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 11 |
| Rear Brake lever has insufficient reserve travel (1.1.2 (a)) | 10 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 10 |
| Steering headbearing has excessive free play |2.2.2| | 10 |
| Stop lamp remains on when the brakes are released | 9 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 8 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 8 |
| Stop lamp not working (4.3.1 (a) (ii)) | 8 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 8 |
| Stop lamp not working |4.3.1 |a| |ii|| | 8 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Offside Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Throttle operating incorrectly |6.2.1f| | 5 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 5 |
| Rear Brake lever mounting insecure |3.1.2a| | 5 |
| Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Front Brake excessively binding |1.2.1 |f|| | 4 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 4 |
| Horn not working |1.7.3a| | 4 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 4 |
| Rear Position lamp not working (4.2.1 (a)) | 4 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Rear Brake lever has insufficient reserve travel |1.1.2 |a|| | 4 |
| Headlamp aim not tested |1.6| | 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| | 3 |
| Front Brake disc|s| cracked |3.2.A1g| | 3 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Front Brake excessively binding (1.2.1 (f)) | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 3 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 3 |
| Rear Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 3 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 3 |
| Nearside Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear position lamp incorrect colour |1.1.2b| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Brake excessively binding (1.2.1 (f)) | 2 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Front Position lamp not working (4.2.1 (a)) | 2 |
| Horn control not functioning. |1.7.2b| | 2 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 2 |
| Rear Brake effort inadequate at a wheel |1.2.1 |a| |i|| | 2 |
| Throttle operating incorrectly |6.2.7 |a| |i|| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 2 |
| Nearside Front Position lamp not working |4.2.1 |a|| | 2 |
| Offside Front Position lamp not working |4.2.1 |a|| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| 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 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 2 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Stop lamp missing |1.3.3a| | 2 |
| Front Front mudguard insecure |2.3.7| | 2 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Brake performance not tested (1.2.1 (g)) | 2 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 2 |
| Nearside Rear Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Brake lever has insufficient reserve travel |1.1.2 |a|| | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Offside Front Position lamp not working (4.2.1 (a)) | 2 |
| Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 2 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 2 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |
| Horn control defective |1.7.2a| | 2 |
| Offside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Nearside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Offside Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Rear Wheel fixing loose (single fixing) (5.2.1 (a) (ii)) | 2 |