| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 75 |
| Registration plate issues | 54 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 37 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 35 |
| Rear reflector on motorcycle missing |1.4.1| | 32 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 20 |
| Front wheel bearings have excessive free play |2.3.5b| | 19 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 19 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 18 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 18 |
| Drive chain excessively loose |6.2.1d| | 16 |
| Front wheel bearings are excessively rough |2.3.5b| | 16 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 16 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 15 |
| Throttle operating incorrectly |6.2.1f| | 14 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 13 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 13 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 12 |
| Horn not working |1.7.3a| | 11 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 11 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 10 |
| Headlamp aim beam image kick up to the offside |1.6| | 10 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 10 |
| 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| | 8 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 8 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Nearside Rear Direction indicator not working |1.5.1c| | 8 |
| Rear Brake disc|s| cracked |3.2.A1g| | 8 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 7 |
| Riders seat insecure |6.2.1a| | 7 |
| Drive chain excessively tight |6.2.1d| | 7 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 7 |
| Steering headbearing has excessive free play |2.2.2| | 7 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 6 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 6 |
| Nearside Front Direction indicator not working |1.5.1c| | 6 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 6 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 6 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 6 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Offside Front Direction indicator insecure |1.5.3b| | 5 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 4 |
| Rear Exhaust markings indicating not for road use or similar wording |7.1.4| | 4 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 4 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 4 |
| Nearside Rear Direction indicators not working |1.5.1c| | 4 |
| Headlamp switch faulty |1.2.4| | 4 |
| Front Steering headbearing has excessive free play |2.2.2| | 4 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Riders seat insecure (6.2.5 (a) (ii)) | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Brake lever cannot be applied smoothly |3.1.3d| | 3 |
| Nearside Front Brake disc|s| has excessive run out |3.2.A1m| | 3 |
| Front Brake excessively binding (1.2.1 (f)) | 3 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 3 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 3 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 3 |
| Nearside Front Direction indicator insecure |1.5.3b| | 3 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 3 |
| Front Exhaust excessively deteriorated |7.1.1a| | 3 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 3 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 3 |
| Offside Front Direction indicator not working |1.5.1c| | 3 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 3 |
| Offside Front Direction indicator not working |4.4.1 |a| |ii|| | 3 |
| Nearside Front Brake disc|s| cracked |3.2.A1g| | 2 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Offside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Nearside Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Front Brake excessively binding |1.2.1 |f|| | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Front Position lamp not working |4.2.1 |a|| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 2 |
| Offside Front Brake disc|s| cracked |3.2.A1g| | 2 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Exhaust mounting missing |7.1.1c| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Nearside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |