| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 13 |
| Horn not working |1.7.3a| | 11 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 9 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Direction indicators not working |1.5.1c| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 4 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 3 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Registration plate issues | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 3 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Drive chain excessively loose |6.2.1d| | 3 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 2 |
| Front Wheel spoke excessively loose |4.2.1b| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Headlamp switch faulty |1.2.4| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Rear Direction indicator not working |1.5.1c| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Fuel system component leaking |7.2.1a| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Front position lamp does not face the front |1.1.1d| | 1 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Front Footrest insecure |6.2.1a| | 1 |
| Brake linkage clevis joint excessively worn |3.2.A1d| | 1 |
| Brake linkage excessively damaged |3.2.A1c| | 1 |
| Nearside Handlebar fouling on the fuel tank or bodywork on full lock |2.1.4 |b|| | 1 |
| Forks in such a condition that steering control is adversely affected |2.2.2 |d| |ii|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Rear Lower Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Offside Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Nearside Front Steering lock stop maladjusted |2.1.3| | 1 |
| Offside Steering lock stop maladjusted |2.1.3| | 1 |
| Horn missing |1.7.1| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Drive chain sprocket so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Rear Brake pedal has insufficient reserve travel |1.1.2 |a|| | 1 |
| Central Front Upper Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Central Front Upper Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Fuel pipe leaking |7.2.1a| | 1 |
| Rear Brake locking device insecure |3.2.A1e| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Rear Brake pedal is inoperative |3.1.3c| | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Fuel tank leaking |7.2.1a| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Wheel alignment incorrect which adversely affects the steering Handlebar to front wheel alignment |2.5.1| | 1 |
| Fuel cap sealing washer deteriorated leaking fuel. |7.2.2c| | 1 |
| Stop lamp does not illuminate immediately a brake applies does not operate with front or rear brake applied. |1.3.1a| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Direction indicators flashing more than 120 times per minute All |1.5.1c| | 1 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Brake linkage has abnormal movement due to excessive wear |3.2.A1i| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Nearside Front suspension assembly component missing |2.3.1| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Footrest missing |6.2.12 |a|| | 1 |
| Rear Stop lamp light intensity significantly reduced |4.3.3 |a| |ii|| | 1 |
| Rear Brake pedal not releasing correctly and functionality of brakes affected |1.1.2 |b| |ii|| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Nearside Front Footrest missing rubber footgrip missing |6.2.1a| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Front Wheel spindle or securing nut|s| so insecure that wheel security or steering control is adversely affected |5.2.1 |c| |ii|| | 1 |
| Rear Wheel spindle or securing nut|s| so insecure that wheel security or steering control is adversely affected |5.2.1 |c| |ii|| | 1 |
| Nearside Front All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Nearside Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Nearside Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front suspension assembly component excessively corroded. |2.3.1| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Front Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Outer Front Footrest missing |6.2.1a| | 1 |
| Front Brake lever is inoperative |3.1.3c| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Rear Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Nearside Rear Footrest missing pillion |6.2.1a| | 1 |
| Offside Rear Footrest missing pillion |6.2.1a| | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Position lamp switch does not illuminate all position lamps with a single operation |4.2.2 |a|| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Rear Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Indicator tell tale not operating correctly |1.5.2| | 1 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Rear Chain guard insecure |6.2.1c| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Front Front mudguard insecure |2.3.7| | 1 |
| Offside Rear Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Offside Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Wheel has an excessively distorted bead rim. |4.2.2| | 1 |