| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 11 |
| Steering headbearing has excessive free play |2.2.2| | 5 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Horn not working |1.7.3a| | 4 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Registration plate issues | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Nearside Rear Footrest missing |6.2.1a| | 3 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Rear Brake locking device missing |3.2.A1e| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Rear Brake rod insecure (1.1.15 (c)) | 2 |
| Rear Brake locking device insecure |3.2.A1e| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Front Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 2 |
| Front Steering lock stop missing |2.1.3| | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Headlamp aim not tested |1.6| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Fuel pipe so insecure there is a risk of fire |6.1.3 |a| |ii|| | 1 |
| Drive chain excessively loose |6.2.1d| | 1 |
| Offside Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Rear Exhaust has part of the system missing |7.1.1a| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Brake rod insecure Split pin missing (1.1.15 (c)) | 1 |
| Brake locking device insecure Rear brake rear torque arm fitting |3.2.A1e| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Offside Rear Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Front Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Nearside Exhaust excessively deteriorated |7.1.1a| | 1 |
| Offside Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Offside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Offside Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Centre Fuel system component insecure |7.2.1b| | 1 |
| Centre Riders seat insecure |6.2.1a| | 1 |
| Offside Front Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Nearside Exhaust silencer insecure |8.1.1 |b| |i|| | 1 |
| Drive chain excessively tight |6.1.7 |k| |i|| | 1 |
| Nearside Front Suspension attachment bracket/mounting insecure bottom yoke bolt missing |5.3.3 |a| |i|| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Rear Position lamp adversely affected by the operation of another lamp |4.2.3 |b|| | 1 |
| Fuel cap leaking |6.1.3 |b| |i|| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Handlebar deformed |2.1.1b| | 1 |
| Nearside Rear Rear suspension component loose |2.4.A.1a| | 1 |
| Offside Rear Rear mono-shock insecure |2.4.B.4| | 1 |
| Front Front position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Offside Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Motorcycle structure excessively distorted |6.1.1a| | 1 |
| Nearside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Nearside Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Offside Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Brake pedal mounting insecure |3.1.2a| | 1 |
| Centre Front Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Rear Rear suspension has corrosion which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Front Gradient brake test indicates a sticking brake |3.3.D1c| | 1 |
| Plate brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.B2b| | 1 |
| Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear Footrest missing (6.2.12 (a)) | 1 |
| Rear Brake component insecure brake anchorage loose |1.1.21 |c|| | 1 |
| Front Lower Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Offside Front Steering lock stop ineffective |2.1.3| | 1 |
| Front Front mudguard insecure |2.3.7| | 1 |
| Front Steering lock stop loose |2.1.3| | 1 |
| Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Nearside Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Front suspension fouling which affects the movement of the front suspension. |2.3.6a| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Fuel cap mounting flange/sealing method defective |7.2.2c| | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Rear Footrest missing |6.2.12 |a|| | 1 |
| Handlebar mounting so insecure that steering is adversely affected |2.2.1 |a| |ii|| | 1 |
| Rear Exhaust silencer likely to become detached |8.1.1 |b| |ii|| | 1 |
| Rear Motorcycle structure joining/attachment plate or fastening so insecure that structural rigidity is seriously reduced fender/light cluster |6.1.1 |b| |ii|| | 1 |
| Rear Drive chain sprocket excessively loose |6.1.7 |c| |i|| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |