| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 14 |
| Drive chain excessively loose |6.2.1d| | 9 |
| Drive chain worn to excess |6.2.1e| | 5 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear reflector on motorcycle missing |1.4.1| | 5 |
| Registration plate issues | 4 |
| Handlebar mounting clamp loose |2.1.1a| | 3 |
| Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Riders seat insecure |6.2.1a| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Horn not working |1.7.3a| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 2 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 2 |
| Chain guard insecure chaingaurd missing |6.2.1c| | 1 |
| Drive chain sprocket worn to excess front and rear |6.2.1e| | 1 |
| Roller brake test indicates a sticking brake rear brake |3.3.A1a| | 1 |
| Handlebar mounting clamp bolt loose l/h mount |2.1.1a| | 1 |
| Brake reaction bracket insecure rear brake bracket insecure |3.2.A1j| | 1 |
| Stop lamp does not illuminate immediately a brake applies front brake switch missing |1.3.1a| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear shock absorber has inadequate damping effect. no damping on rear shock absorber |2.4.A.3b| | 1 |
| Rear mono-shock pivot seized |2.4.B.4| | 1 |
| Position lamp switch insecure l/h switch insecure |1.1.4b| | 1 |
| Rear wheel rotation likely to be impeded lower chain guide insecure and may jam chain or wheel |6.2.1b| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Steering operation restricted in free movement from lock to lock clutch cable fouling in lock stop (2.1.4 (c)) | 1 |
| Offside Front Brake grabbing severely Master sticking , freed up at time of test (1.2.1 (c)) | 1 |
| Offside Lower Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride chain link |6.2.1h| | 1 |
| Horn control not readily accesible. |1.7.2a| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Front Stop lamp not working Front switch |4.3.1 |a| |ii|| | 1 |
| Rear 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|| | 1 |
| Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear Wheel alignment incorrect which adversely affects the steering |2.4 |a|| | 1 |
| Rear Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Central Rear Lower Suspension component ball joint excessively worn |5.3.4 |a| |i|| | 1 |
| Front Brake disc significantly and obviously worn |1.1.14 |a| |i|| | 1 |
| Front Steering operation linkage fouling when handlebars turned from lock to lock |2.1.4 |a|| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Nearside Indicator tell tale not functioning |1.5.2| | 1 |
| Offside Indicator tell tale not functioning |1.5.2| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Rear Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Motorcycle structure joining/attachment plate or fastening insecure fender loose (6.1.1 (b) (i)) | 1 |
| Rear Motorcycle structure joining/attachment plate or fastening insecure fender loose (6.1.1 (b) (i)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Horn not working Flat battery (7.7 (a) (ii)) | 1 |
| Rear Chain guard insecure |6.2.1c| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride Sprocket bolt missing |6.2.1h| | 1 |
| Rear Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 1 |
| Stop lamp damaged and function impaired Front brake switch not connected. |1.3.3a| | 1 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies only come on when brake is fully applied |1.3.1a| | 1 |
| Rear Brake caliper|s| insecure |3.2.A1j| | 1 |
| Rear Brake disc|s| cracked |3.2.A1g| | 1 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Throttle operating incorrectly sticking |6.2.1f| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Brake lever excessively damaged |3.2.A1c| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Front Brake disc contaminated |1.1.14 |b|| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Front Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Direction indicator missing |1.5.1a| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Registration plate lamp issues | 1 |
| Rear Brake pedal not releasing correctly and functionality of brakes affected arm semi seized in hub? (1.1.2 (b) (ii)) | 1 |
| Front Fork yoke insecure (2.2.2 (d) (i)) | 1 |
| 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| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Brake pedal is inoperative Replacement switch required |3.1.3c| | 1 |
| Direction indicator not working All four |1.5.1c| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing headstock bearing |2.2.1a| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Steering lock stop maladjusted worn on left lock |2.1.3| | 1 |
| Brake pedal cannot be released smoothly sticking on |3.1.3d| | 1 |
| Rear Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| 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)) | 1 |
| Exhaust system insecure (6.1.2 (a)) | 1 |
| Rear Position lamp adversely affected by the operation of another lamp (4.2.3 (b)) | 1 |
| Stop lamp adversely affected by the operation of another lamp (4.3.3 (b)) | 1 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Rear Suspension arm pin or bush likely to become detached (5.3.4 (a) (ii)) | 1 |
| Brake lever mounting insecure broken |3.1.2a| | 1 |
| Rear Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking mudgard |6.1.1c| | 1 |
| Rear Direction indicator insecure n/s o/s |1.5.3b| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride sprocet |6.2.1h| | 1 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 1 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |