| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 29 |
| Drive chain excessively loose |6.2.1d| | 11 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Registration plate issues | 2 |
| Rear Brake lagging in operation (1.2.1 (d)) | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear Brake excessively binding (1.2.1 (f)) | 2 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Rear Brake pedal attachment screws loose |3.1.2b| | 1 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Nearside Rear Footrest insecure (6.2.12 (a)) | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Rear Lower Brake reaction bracket securing bolt|s| missing Tie arm missing locking split pin |3.2.A1j| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride Drive chain connecting link wrong way round |6.2.1h| | 1 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Front Direction indicator insecure |1.5.3b| | 1 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling (2.5.1) | 1 |
| Drive chain excessively loose (6.2.1d) | 1 |
| Front Brake lever cannot be applied smoothly (3.1.3d) | 1 |
| Rear Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Front Exhaust has a major leak of exhaust gases balance pipe coroded (6.1.2 (a)) | 1 |
| Front Floor brake test indicates a sticking brake (3.3.C2c) | 1 |
| Rear Braking system does not have an approriate system/s fitted according to its age |3.1.1| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Floor brake test Neither brake control achieves an efficiency of 25% |3.3.C1b| | 1 |
| Nearside Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Brake pedal 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 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Front Brake lever insecure (1.1.2 (e) (i)) | 1 |
| Brake component insecure REAR REACTION ROD INSECURE (1.1.21 (c)) | 1 |
| Fuel system component leaking FUEL TAP LEAKING (6.1.3 (b) (i)) | 1 |
| Front Brake lagging in operation FRONT BRAKE LEVER PIVOT STICKY. (1.2.1 (d)) | 1 |
| Nearside Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Offside Footrest missing damage in upper condition unable to rest foot to access brake lever |6.2.1a| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Dipswitch does not operate immediately when selected on dipped beam |4.1.3 |b|| | 1 |
| Throttle operating incorrectly |6.2.7 |a| |i|| | 1 |
| Front Headlamp aim not tested cannot switch to dipped beam. (4.1.2 (b)) | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Nearside Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Rear Brake back plate|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Offside Front Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |
| Rear Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Brake rod insecure No locking device on rear brake reaction arm (split pin missing or fit self locking nut) (1.1.15 (c)) | 1 |
| Wheel fixing missing |multiple fixings| both reaction arm split pins missing |5.2.1 |a| |i|| | 1 |
| Shock absorber has a serious fluid leak offside and nearside fork seals (5.3.2 (b)) | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Rear Stop lamp adversely affected by the operation of another lamp (4.3.3 (b)) | 1 |
| Front Brake disc contaminated with fork oil (1.1.14 (b)) | 1 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Rear Brake pedal not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 1 |
| Nearside Rear Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Nearside Position lamp switch insecure |1.1.4b| | 1 |
| Brake back plate insecure split pin fixing missing (1.1.14 (d)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Brake grabbing severely (1.2.1 (c)) | 1 |
| Front Brake grabbing severely (1.2.1 (c)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Front Wheel bearing play so excessive that directional control is impaired (5.1.3 (a) (ii)) | 1 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Brake pedal has insufficient reserve travel adjusted on test (1.1.2 (a)) | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Nearside Drive chain excessively loose |6.2.1d| | 1 |
| Horn not working |1.7.3a| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Position lamp not working low beam (4.2.1 (a)) | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Registration plate lamp issues | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Fuel tank leaking (6.1.3 (b) (i)) | 1 |