| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 12 |
| Registration plate issues | 6 |
| Horn not working |1.7.3a| | 6 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear reflector on motorcycle missing |1.4.1| | 4 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 4 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Drive chain excessively loose |6.2.1d| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Front Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Rear Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Offside Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Front Riders seat insecure |6.2.5 |a| |ii|| | 1 |
| Upper Fuel system component leaking excessively or a risk of fire |6.1.3 |b| |ii|| | 1 |
| Front Fuel tank so insecure there is a risk of fire |6.1.3 |a| |ii|| | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front position lamp damaged and function impaired |1.1.1b| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Nearside Indicator switch insecure switchgear loose. |1.5.4| | 1 |
| Rear Stop lamp does not emit a steady light goes on and off. |1.3.1b| | 1 |
| Stop lamp does not illuminate immediately a brake applies Front switch |1.3.1a| | 1 |
| Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Nearside Handlebar handgrip missing |2.1.1c| | 1 |
| Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Front Direction indicator obscured |1.5.1a| | 1 |
| Nearside Rear Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Offside Rear Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Rear Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Brake fluid not visible (1.1.10 (d) (iii)) | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Offside Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Centre Front Upper Fuel system component insecure |7.2.1b| | 1 |
| Nearside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Rear Brake component has an inadequate repair |3.1.5| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Nearside Front Direction indicator missing |1.5.1a| | 1 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Offside Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Brake hose leaking fluid |3.2.B4| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Rear Lower Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Nearside Front Brake hose fouling |3.2.B3b| | 1 |
| Nearside Front Brake locking device insecure |3.2.A1e| | 1 |
| Brake locking device insecure |3.2.A1e| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Centre Front Horn not working |1.7.3a| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Brake lever has abnormal movement of levers indicating excessive wear or maladjustment (1.1.15 (f)) | 1 |
| Nearside Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Offside Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Direction indicator missing |1.5.1a| | 1 |
| Rear Direction indicator missing |1.5.1a| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Rear suspension component loose |2.4.A.1a| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Footrest insecure |6.2.1a| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Front Handlebar mounting clamp loose |2.1.1a| | 1 |
| Rear Brake pedal insecure |3.1.2a| | 1 |