| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 46 |
| Rear reflector on motorcycle missing |1.4.1| | 17 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 10 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 8 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 8 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 8 |
| Registration plate issues | 6 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 6 |
| Headlamp aim beam image kick up to the offside |1.6| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 5 |
| Horn not working |1.7.3a| | 5 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Headlamp insecure |1.2.3b| | 4 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 4 |
| Nearside Front Direction indicator not working |1.5.1c| | 4 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Rear Brake excessively binding (1.2.1 (f)) | 3 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 2 |
| Offside Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Front Front wheel spindle securing nut locking device missing |2.3.5a| | 2 |
| Front Headlamp insecure |1.2.3b| | 2 |
| Rear Brake locking device missing |3.2.A1e| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Direction indicator not working |1.5.1c| | 2 |
| Rear Direction indicator insecure |1.5.3b| | 2 |
| Drive chain excessively loose |6.2.1d| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Front position lamp incorrect colour |1.1.2a| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Steering linkage locking device ineffective |2.1.3 |d|| | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Front wheel spindle securing nut locking device insecure |2.3.5a| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Front Brake disc|s| securing bolt|s| loose |3.2.A1g| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Central Front Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 1 |
| Rear Decelerometer brake test indicates a binding brake |3.3.E1d| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Headlamp switch insecure |1.2.4| | 1 |
| Nearside Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Rear Riders seat insecure |6.2.1a| | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Fuel tank leaking |7.2.1a| | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Fuel system component leaking carb (6.1.3 (b) (i)) | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Rear Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Front Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Front Brake master cylinder severely damaged |3.2.B1b| | 1 |
| Front Brake lever attachment screws missing |3.1.2b| | 1 |
| Headlamp aim beam image kick up to the offside (1.6) | 1 |
| Rear reflector on motorcycle missing (1.4.1) | 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 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Offside Rear Direction indicator missing (4.4.1 (a) (ii)) | 1 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Wheel spindle loose (5.2.1 (c) (i)) | 1 |
| Rear Wheel more than one fixing loose locking device missing (5.2.1 (a) (ii)) | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front Brake disc|s| insecure |3.2.A1g| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front Front wheel spindle securing nut|s| loose |2.3.5a| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Offside Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Stop lamp does not illuminate immediately a brake applies Front brake application. |1.3.1a| | 1 |
| Nearside Front All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Rear Brake component insecure (1.1.21 (c)) | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Lower Steering headbearing has excessive free play |2.2.2| | 1 |
| Centre Front Upper Handlebar mounting clamp loose |2.1.1a| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear Brake pedal is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Front Throttle operating incorrectly |6.2.1f| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Rear suspension bush has excessive free play swing arm
|2.4.A2a|i|| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride nut missing |6.2.1h| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Drive chain fouling another component BACK ENGINE MOUNT BOLT |6.2.1d| | 1 |
| Rear Brake pedal insecure |3.1.2a| | 1 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Front Brake locking device missing |3.2.A1e| | 1 |
| Rear Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Nearside Fuel system component insecure |7.2.1b| | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Brake pipe excessively corroded | 1 |
| Drive chain horseshoe locking device incorrectly fitted Chain locking device incorrectly fitted. |Wrong direction| |6.1.7 |j| |i|| | 1 |
| Headlamp insecure |4.1.1 |c|| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |
| Rear Front wheel spindle securing nut locking device insecure |2.3.3a| | 1 |
| Fuel hose leaking (6.1.3 (b) (i)) | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Brake effort inadequate at a wheel |1.2.1 |a| |i|| | 1 |
| Nearside Clutch lever bent so it cannot be readily operated |6.2.7 |b|| | 1 |
| Headlamp aim beam image kick up to the offside FRONT |1.6| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Rear Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Brake hose damaged | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Central Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear position lamp adversely affected by the operation of the horn |1.1.3b| | 1 |
| Front position lamp adversely affected by the operation of the horn |1.1.3b| | 1 |
| Headlamp aim beam image too far to the left |1.6.4| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Front Horn not working (7.7 (a) (ii)) | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Rear Footrest insecure |6.2.1a| | 1 |
| Steering operation restricted in free movement from lock to lock steering notchy |2.1.4 |c|| | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Rear Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |
| Rear Brake fluid reservoir insecurely mounted |3.2.B1a| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Fuel pipe union leaking |7.2.1a| | 1 |
| Front Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Front wheel spindle securing nut locking device missing (2.3.3a) | 1 |
| Position lamp switch insecure |1.1.4b| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Rear Brake drum|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Nearside Front Handlebar handgrip missing |2.1.1c| | 1 |
| Nearside Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |