| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 18 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 7 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Horn not working |1.7.3a| | 5 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 4 |
| Drive chain excessively tight |6.2.1d| | 4 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 3 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Registration plate issues | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Drive chain excessively loose |6.2.1d| | 2 |
| Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 2 |
| Offside Throttle operating incorrectly |6.2.1f| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 2 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Front Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Nearside Rear Exhaust excessively deteriorated |7.1.1a| | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Offside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Front Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Brake disc|s| excessively worn FRONT |3.2.A1l| | 1 |
| Brake lever is damaged and the brake cannot be readily applied FRONT |3.1.3c| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Nearside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Front Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Front Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Rear Drive chain excessively loose |6.1.7 |c| |i|| | 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 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Offside Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Offside Front Upper Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Front Upper Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Nearside Rear Lower Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Nearside Front Direction indicator missing |1.5.1a| | 1 |
| Offside Front Direction indicator missing |1.5.1a| | 1 |
| Rear Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Rear wheel spindle loose |2.4.A.2b| | 1 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Motorcycle structure excessively distorted |6.1.1a| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Brake excessively binding FRONT |1.2.1 |f|| | 1 |
| Front Brake lever has insufficient reserve travel |1.1.2 |a|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Front Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Front Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Horn sound not in accordance with requirements only when engine running (7.7 (c)) | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Front Brake caliper leaking and braking performance affected |1.1.16 |b| |ii|| | 1 |
| Nearside Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Offside Rear Lower Brake locking device missing |3.2.A1e| | 1 |
| Front Brake master cylinder defective but brake still operating (1.1.10 (b) (i)) | 1 |
| Front Front position lamp insecure |1.1.1c| | 1 |
| Offside Front Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Nearside Front Handlebar handgrip missing |2.1.1c| | 1 |
| Front Riders seat insecure |6.2.1a| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Fuel cap sealing washer torn |7.2.2c| | 1 |
| Rear Upper Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Nearside Rear Chain guard insecure |6.2.1c| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front Stop lamp adversely affected by the operation of another lamp (4.3.3 (b)) | 1 |
| Rear Stop lamp adversely affected by the operation of another lamp (4.3.3 (b)) | 1 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Registration plate lamp issues | 1 |
| Front Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Rear Brake locking device insecure |3.2.A1e| | 1 |
| Rear Stop lamp switch with a delay in operation |4.3.2 |a| |ii|| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Brake hose excessively deteriorated | 1 |
| Nearside Rear Indicator tell tale not functioning |1.5.2| | 1 |
| Front Clutch lever bent so it cannot be readily operated. |6.2.1g| | 1 |
| Front Brake lever excessively damaged |3.2.A1c| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Offside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Offside Front Direction indicator incorrect colour Damaged lens |1.5.1b| | 1 |
| Front Front mudguard insecure |2.3.7| | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |