| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 109 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 50 |
| Steering headbearing has excessive free play |2.2.2| | 48 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 35 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 33 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 32 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 28 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 22 |
| Horn not working |1.7.3a| | 22 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 21 |
| Registration plate issues | 19 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 17 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 16 |
| Rear reflector on motorcycle missing |1.4.1| | 16 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 15 |
| Front wheel bearings are excessively rough |2.3.5b| | 13 |
| Brake hose excessively deteriorated | 12 |
| Headlamp insecure |1.2.3b| | 11 |
| Throttle operating incorrectly |6.2.1f| | 11 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 11 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 11 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 10 |
| Nearside Rear Direction indicator not working |1.5.1c| | 10 |
| Front wheel bearings have excessive free play |2.3.5b| | 10 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 9 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 8 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 8 |
| Riders seat insecure |6.2.1a| | 8 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 8 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 7 |
| Stop lamp remains on when the brake is released |1.3.1e| | 7 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 7 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 7 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 7 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 6 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 6 |
| Nearside Rear Direction indicators not working |1.5.1c| | 6 |
| Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 6 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 6 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 6 |
| Front Steering headbearing has excessive free play |2.2.2| | 6 |
| Brake lever has inadequate reserve travel |3.1.3b| | 5 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 5 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 5 |
| Offside Rear Direction indicator insecure |1.5.3b| | 5 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 5 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 5 |
| Offside Rear Direction indicator not working |1.5.1c| | 5 |
| Offside Rear Direction indicators not working |1.5.1c| | 4 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 4 |
| Upper Rear suspension bush has excessive free play |2.4.A2a|i|| | 4 |
| Handlebar mounting clamp loose |2.1.1a| | 4 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 4 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 4 |
| Exhaust excessively deteriorated |7.1.1a| | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Rear reflector on motorcycle obscured |1.4.1| | 4 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 4 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 4 |
| Nearside Front Direction indicators not working |1.5.1c| | 4 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 4 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 4 |
| Nearside Front Direction indicator not working |1.5.1c| | 4 |
| Direction indicators not working |1.5.1c| | 4 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Indicator switch insecure |1.5.4| | 4 |
| Front suspension has inadequate damping effect. |2.3.6c| | 4 |
| Front mudguard insecure |2.3.7| | 3 |
| Nearside Indicator tell tale not functioning |1.5.2| | 3 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 3 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 3 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 3 |
| Rear Direction indicator incorrect colour |1.5.1b| | 3 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 3 |
| Rear Brake lever pivots excessively worn |3.1.3a| | 3 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Offside Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 3 |
| Front Brake caliper|s| insecure |3.2.A1j| | 3 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 3 |
| Front position lamp incorrect colour |1.1.2a| | 3 |
| An item not tested |Manual| | 3 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 3 |
| Horn not working (7.7 (a) (ii)) | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 3 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 3 |
| Steering control handlebar movement restricted by cables caught on a projection |2.1.2c| | 3 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 3 |
| Exhaust has part of the system missing |7.1.1a| | 3 |
| Front Horn not working |1.7.3a| | 3 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Indicator switch defective |1.5.4| | 2 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Exhaust mounting missing |7.1.1c| | 2 |
| Rear Brake lever has insufficient reserve travel (1.1.2 (a)) | 2 |
| Plate brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.B2b| | 2 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear Brake lever mounting insecure |3.1.2a| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Rear Brake lever attachment screws loose |3.1.2b| | 2 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 2 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 2 |
| Fuel system component insecure |7.2.1b| | 2 |
| Offside Front Direction indicator insecure |1.5.3b| | 2 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 2 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 2 |
| Front Front mudguard insecure |2.3.7| | 2 |
| Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 2 |
| Front Direction indicators not working |1.5.1c| | 2 |
| Stop lamp emits other than a steady red light |1.3.1b| | 2 |
| Rear position lamp incorrect colour |1.1.2b| | 2 |
| Brake lever insecure |3.1.2a| | 2 |
| Position lamp switch insecure |1.1.4b| | 2 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 2 |
| Rear Brake lever attachment screws missing |3.1.2b| | 2 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Offside Rear Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 2 |
| Position lamp switch faulty |1.1.4a| | 2 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 2 |
| Horn is not continous or uniform |1.7.3c| | 2 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Nearside Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 2 |
| Upper Steering linkage has excessive free play |2.2.2| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Front Valve stem seriously damaged |5.2.3 |j|| | 2 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 2 |
| Offside Front Direction indicators not working |1.5.1c| | 2 |
| Front suspension assembly component excessively misaligned |2.3.1| | 2 |
| Offside Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 2 |
| Front Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Steering linkage has excessive free play |2.2.2| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Brake hose damaged | 2 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |