| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 38 |
| Registration plate issues | 12 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 11 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Rear reflector on motorcycle missing |1.4.1| | 8 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 8 |
| Drive chain worn to excess |6.2.1e| | 6 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 6 |
| Drive chain excessively loose |6.2.1d| | 6 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 5 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Riders seat insecure |6.2.1a| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear Wheel spoke excessively loose |4.2.1b| | 4 |
| Drive chain excessively tight |6.2.1d| | 4 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Front Wheel spoke excessively loose |4.2.1b| | 3 |
| Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 2 |
| Indicator switch insecure |1.5.4| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Horn not working |1.7.3a| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Drive chain excessively tight, so that it is likely to fail |6.1.7 |k| |ii|| | 1 |
| Front Brake caliper operating mechanism has excessive travel (1.1.16 (e) (i)) | 1 |
| Fuel system component leaking From carburettor overflow (6.1.3 (b) (i)) | 1 |
| Rear All direction indicators adversely affected by the operation of another lamp (4.4.3 (b)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Rear spring fractured |2.4.A1b|i|| | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| An item not tested |Manual| | 1 |
| Centre Rear Lower Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Offside Front Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front Brake locking device missing |3.2.A1e| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Handlebar mounting clamp loose |2.1.1a| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 1 |
| Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 1 |
| Rear Brake hose which buldges |3.2.B4| | 1 |
| Position lamp switch insecure |1.1.4b| | 1 |
| Centre Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |
| Rear spring worn and seriously weakened |2.4A1b|ii|| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Rear Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Nearside Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| 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| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Front Stop lamp does not illuminate immediately a brake applies operation |1.3.1a| | 1 |
| Brake caliper|s| insecure |3.2.A1j| | 1 |
| Rear Brake hose excessively kinked |3.2.B3a| | 1 |
| Front Stop lamp not working Brake switch n/w (4.3.1 (a) (ii)) | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Front Brake disc|s| securing bolt|s| missing |3.2.A1g| | 1 |
| Offside Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Registration plate lamp issues | 1 |
| Throttle operating incorrectly |6.2.7 |a| |i|| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Position lamp showing white light to the rear |4.2.3 |a| |ii|| | 1 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Rear Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Stop lamp does not illuminate immediately a brake applies control 1 |1.3.1a| | 1 |
| Centre Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Rear Brake effort inadequate at a wheel |1.2.1 |a| |i|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Offside Rear Lower Brake disc significantly and obviously worn rear disc distorted |1.1.14 |a| |i|| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Front Headlamp insecure (4.1.1 (c)) | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |