| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 15 |
| Rear reflector on motorcycle missing |1.4.1| | 6 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 4 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Exhaust noise is clearly in excess of that emitted by a similar motor bicycle fitted with a standard silencer in average condition |7.1.2| | 3 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Registration plate issues | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Nearside Front Footrest insecure |6.2.1a| | 2 |
| Rear position lamp obscured more than 50% |1.1.1d| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Brake hose damaged | 2 |
| Rear Direction indicator not working |1.5.1c| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Rear Brake master cylinder leaking (1.1.10 (b) (ii)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Nearside Front Direction indicator likely to become detached sidecar (4.4.1 (c) (ii)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Nearside Front Position lamp not working (4.2.1 (a)) | 1 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear Brake disc(s) excessively scored (3.2.A1l) | 1 |
| Rear Brake disc(s) cracked (3.2.A1g) | 1 |
| Offside Front Footrest insecure (6.2.1a) | 1 |
| Offside Front Brake disc(s) friction surface contaminated by oil or grease (3.2.A1k) | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Front Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Nearside Upper Front suspension assembly component loose |2.3.1| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Brake hose excessively deteriorated | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Front Throttle operating incorrectly |6.2.1f| | 1 |
| Offside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Nearside Front Lower Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Front Brake pipe union leaking fluid |3.2.B4| | 1 |
| Outer Front Brake pipe union leaking fluid |3.2.B4| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Front Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |
| Stop lamp missing |1.3.3a| | 1 |
| Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Parking brake is not capable of being maintained in operation by direct mechanical action only |3.1.2| | 1 |
| Nearside Front brake caliper locking device insecure |3.5.1l| | 1 |
| Offside Front brake caliper locking device insecure |3.5.1l| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Front Brake cylinder insecurely mounted |3.2.B1a| | 1 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Fuel cap sealing washer torn |7.2.2c| | 1 |
| Hydraulic brake cylinder insecurely mounted |3.6.A.2a| | 1 |
| Offside Rear position lamp|s| not working |1.1.A.3b| | 1 |
| Front Stub axle inappropriately repaired |2.4.A.2| | 1 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Brake component insecure rear brake caliper split pin missing |1.1.21 |c|| | 1 |
| Dipswitch operation does not extinguish all main beam headlamps leaving at least one pair of dipped beam headlamps no main beam does not work |1.7.4b| | 1 |
| Rear reflector obviously incorrectly positioned |1.5.1a| | 1 |
| Rear Mechanical brake component has restricted free movement | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Offside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Sidecar wheel bearings have excessive free play |5.2.3c| | 1 |
| Horn not working |1.7.3a| | 1 |
| Rear Rear wheel insecure |4.2.3b| | 1 |
| Exhaust is leaking and excessively noisey at engine |7.1.1b| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Lower Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Brake locking device missing calipair suport arm castle nuts split pins missing |3.2.A1e| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |