| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 52 |
| Registration plate issues | 49 |
| Headlamp aim out of alignment | 36 |
| Horn not working |1.7.3a| | 12 |
| Front wheel bearings have excessive free play |2.3.5b| | 11 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 11 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 10 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 9 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Front wheel bearings are excessively rough |2.3.5b| | 8 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 8 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Rear reflector missing (4.8.2 (a) (ii)) | 6 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 5 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 4 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Horn not working (7.7 (a) (ii)) | 3 |
| Rear Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Rear reflector missing |4.8.2 |a| |ii|| | 3 |
| Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Front suspension has inadequate damping effect. |2.3.6c| | 3 |
| Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Drive chain excessively loose |6.2.1d| | 2 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 2 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Nearside Rear Direction indicator missing |1.5.1a| | 2 |
| Offside Rear Direction indicator missing |1.5.1a| | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Headlamp aim not tested (4.1.2 (b)) | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Registration plate lamp issues | 2 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Central Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Rear Brake caliper|s| insecure |3.2.A1j| | 1 |
| Direction indicators not working (1.5.1c) | 1 |
| Rear Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Front Handlebar so insecure it is likely to become detached loose |2.2.1 |b| |ii|| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Front position lamp damaged and function impaired |1.1.1b| | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Rear Direction indicator missing |1.5.1a| | 1 |
| Nearside Front Direction indicator missing |1.5.1a| | 1 |
| Offside Front Direction indicator missing |1.5.1a| | 1 |
| Nearside Rear Outer Wheel fixing loose (single fixing) spindle mount split (5.2.1 (a) (ii)) | 1 |
| Front Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Fuel system component leaking excessively or a risk of fire (6.1.3 (b) (ii)) | 1 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Handlebar retaining device missing upper yoke pinch bolt (2.2.1 (b) (i)) | 1 |
| Rear reflector on sidecar incorrectly positioned |1.4.2d| | 1 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Headlamp insecure |4.1.1 |c|| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Horn not working (7.7 (a) (ii)) | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Front Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 1 |
| Motorcycle structure cracked rear subframe |6.1.1a| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride rear sprocket locking bolts are loose |6.2.1h| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Nearside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Indicator switch defective |1.5.4| | 1 |
| Rear Brake has no recorded effort at a wheel (1.2.1 (a) (ii)) | 1 |
| Front Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Central Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Motorcycle structure cracked Rear wheel spindle. |6.1.1a| | 1 |
| Brake component is severely distorted |3.1.5| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Brake performance not tested |1.2.1 |g|| | 1 |
| Rear Lower Suspension component ball joint excessively worn |5.3.4 |a| |i|| | 1 |
| Rear Suspension arm pin or bush excessively worn swinging arm |5.3.4 |a| |i|| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Rear Wheel spindle or securing nut|s| so insecure that wheel security or steering control is adversely affected |5.2.1 |c| |ii|| | 1 |
| Nearside Rear Motorcycle structure is fractured and structural rigidity is significantly reduced sub-frame (6.1.1 (a) (i)) | 1 |
| Offside Rear Motorcycle structure is fractured and structural rigidity is significantly reduced sub-frame (6.1.1 (a) (i)) | 1 |
| Horn missing |1.7.1| | 1 |
| Rear Brake lagging in operation (1.2.1 (d)) | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Nearside Rear Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Headlamp light intensity severely reduced (4.1.4 (a)) | 1 |
| Rear reflector on motorcycle missing (1.4.1) | 1 |
| Rear position lamp missing (1.1.1a) | 1 |
| Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 1 |