| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 20 |
| Rear reflector on motorcycle missing |1.4.1| | 18 |
| Registration plate issues | 10 |
| Front wheel bearings have excessive free play |2.3.5b| | 8 |
| Horn not working |1.7.3a| | 6 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Drive chain excessively loose |6.2.1d| | 5 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Front wheel bearings are excessively rough |2.3.5b| | 4 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Front position lamp incorrect colour |1.1.2a| | 2 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Rear Brake disc|s| cracked |3.2.A1g| | 2 |
| Nearside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Offside Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Brake performance not tested |3.3| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Floor brake test Neither brake control achieves an efficiency of 25% |3.3.C1b| | 1 |
| Rear Brake pipe excessively chafed |3.2.B2a| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Nearside Front Drive chain fouling another component |6.2.1d| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Nearside Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Brake has no recorded effort at a wheel (1.2.1 (a) (ii)) | 1 |
| Central Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Front Floor brake test indicates a severely grabbing brake |3.3.C2d| | 1 |
| Suspension arm pin or bush excessively worn |5.3.4 |a| |i|| | 1 |
| Nearside Handlebar excessively deformed |2.2.1 |c| |i|| | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| All direction indicators missing (4.4.1 (a) (ii)) | 1 |
| Forks in such a condition that steering control is adversely affected front mudguard brace missing (2.2.2 (d) (ii)) | 1 |
| Offside Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Nearside Front Brake hose stretched by suspension movement |3.2.B3b| | 1 |
| Front All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Centre Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Centre Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Outer Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Outer Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Centre Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Offside Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Centre Front Front suspension assembly component missing |2.3.1| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Front Handlebar fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Centre Rear Lower Rear mono-shock pivot seized |2.4.B.4| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Nearside Rear Rear suspension bush has excessive free play swinging arm |2.4.A2a|i|| | 1 |
| Offside Rear Rear suspension bush has excessive free play swinging arm |2.4.A2a|i|| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Front position lamp does not illuminate immediately when switched on High Beam |1.1.3a| | 1 |
| Front wheel spindle loose |2.3.5a| | 1 |
| Direction indicator incorrect colour |1.5.1b| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Offside Rear Lower Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Rear Wheel fixing missing (multiple fixings) spindle splitpin missing (5.2.1 (a) (i)) | 1 |
| Rear Wheel fixing missing (multiple fixings) brake arm locking devise missing (5.2.1 (a) (i)) | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Brake lever mounting insecure |3.1.2a| | 1 |
| Rear reflector on motorcycle damaged and function impaired |1.4.2a| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Nearside Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear reflector on motorcycle does not reflect squarely to the rear |1.4.1| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Centre Front Lower Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Nearside Front Brake component leaking fluid |3.2.B4| | 1 |