| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 18 |
| Drive chain excessively loose |6.2.1d| | 11 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 7 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Registration plate issues | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Rear Drive chain worn to excess |6.2.1e| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 3 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 2 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear Brake excessively binding (1.2.1 (f)) | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Front Brake locking device missing |3.2.A1e| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride trailing arm split pin missing |6.2.1h| | 1 |
| Front Brake caliper|s| insecure |3.2.A1j| | 1 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Fuel pipe damaged |6.1.3 |c| |ii|| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Offside Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Nearside Inner Exhaust excessively deteriorated |7.1.1a| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Fuel system component leaking Carb Leaking |6.1.3 |b| |i|| | 1 |
| Rear Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Offside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Stop lamp does not illuminate immediately a brake applies Front control 1 |1.3.1a| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Offside Front Lower Brake disc significantly and obviously worn |1.1.14 |a| |i|| | 1 |
| Central Front Upper Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Offside Front Upper Throttle operating incorrectly |6.2.7 |a| |i|| | 1 |
| Offside Rear Lower Brake component insecure |1.1.21 |c|| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Front Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Front Wheel bearing play so excessive that directional control is impaired |5.1.3 |a| |ii|| | 1 |
| Front Brake grabbing severely |1.2.1 |c|| | 1 |
| Nearside Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Horn emits 2 or more alternating tones |1.7.3b| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride split link |6.2.1h| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Nearside Front suspension assembly component excessively bent |2.3.1| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Front brake disc in such a condition that it is seriously weakened | 1 |
| Nearside Front Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Brake performance not tested (1.2.1 (g)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Headlamp aim unable to be tested (4.1.2 (b)) | 1 |
| Position lamp not working (4.2.1 (a)) | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Dipswitch does not operate immediately when selected on main beam (4.1.3 (b)) | 1 |
| Front Position lamp missing (4.2.1 (a)) | 1 |
| Position lamp adversely affected by the operation of another lamp flashes when when indicators turned on (4.2.3 (b)) | 1 |