| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 109 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 47 |
| Drive chain excessively loose |6.2.1d| | 36 |
| Registration plate issues | 32 |
| Headlamp aim beam image kick up to the offside |1.6| | 27 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 22 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 20 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 18 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 18 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 17 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 16 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 16 |
| Rear reflector on motorcycle missing |1.4.1| | 14 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 13 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 12 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 12 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 12 |
| Horn not working |1.7.3a| | 12 |
| Drive chain worn to excess |6.2.1e| | 12 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 11 |
| Front wheel bearings are excessively rough |2.3.5b| | 11 |
| Registration plate lamp issues | 10 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Drive chain excessively tight |6.2.1d| | 9 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 8 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 7 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 7 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 6 |
| Brake lever has inadequate reserve travel |3.1.3b| | 6 |
| Front Steering headbearing has excessive free play |2.2.2| | 6 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 6 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 6 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 6 |
| Steering headbearing has excessive free play |2.2.2| | 6 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 5 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 5 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 4 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 4 |
| Offside Handlebar deformed |2.1.1b| | 4 |
| Front Brake excessively binding |1.2.1 |f|| | 4 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 4 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 4 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 4 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 4 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 3 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Chain guard insecure |6.2.1c| | 3 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 3 |
| Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Front Handlebar deformed |2.1.1b| | 3 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Offside Front Direction indicators not working |1.5.1c| | 3 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Rear Brake component is excessively corroded |3.1.5| | 2 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 2 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 2 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 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 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Offside Front Handlebar deformed |2.1.1b| | 2 |
| Front Brake lever has insufficient reserve travel seems as if only one caliper is working |1.1.2 |a|| | 2 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 2 |
| Front Wheel bearing so rough it is likely to overheat or break up |5.1.3 |b| |ii|| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Rear Brake hose which buldges |3.2.B4| | 2 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Rear Drive chain excessively loose |6.2.1d| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Offside Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Centre Front Upper Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Throttle operating incorrectly |6.2.7 |a| |i|| | 2 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Front Position lamp not working (4.2.1 (a)) | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Headlamp aim not tested (4.1.2 (b)) | 2 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Rear Plate brake test indicates a binding brake |3.3.B1a| | 2 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 2 |
| Rear Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Nearside Front Direction indicator not working (1.5.1c) | 2 |
| Nearside Rear Direction indicator not working (1.5.1c) | 2 |
| Rear Roller brake test indicates a binding brake (3.3.A1a) | 2 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Rear reflector on motorcycle missing (1.4.1) | 2 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 2 |
| Lower Steering headbearing has excessive free play |2.2.2| | 2 |
| Front Brake pipe inadequately supported |3.2.B2b| | 2 |