| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 54 |
| Rear reflector on motorcycle missing |1.4.1| | 19 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 16 |
| Registration plate issues | 13 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Horn not working |1.7.3a| | 9 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 7 |
| Headlamp aim beam image kick up to the offside |1.6| | 7 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 7 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 6 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 6 |
| Fuel system component leaking |7.2.1a| | 6 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 6 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Drive chain excessively loose |6.2.1d| | 5 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Headlamp insecure |1.2.3b| | 4 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Riders seat insecure |6.2.1a| | 4 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Rear Brake locking device missing |3.2.A1e| | 3 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Horn not working (7.7 (a) (ii)) | 3 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Rear Position lamp not working |4.2.1 |a|| | 2 |
| Nearside Front Footrest insecure |6.2.1a| | 2 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 2 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Rear Brake disc|s| cracked |3.2.A1g| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Fuel pipe leaking |7.2.1a| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 2 |
| 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| | 2 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Nearside Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear position lamp obscured more than 50% |1.1.1d| | 1 |
| Stop lamp obscured |1.3.1c| | 1 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Rear Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Rear Lower Brake locking device missing |3.2.A1e| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Brake pipe inadequately supported |3.2.B2b| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Nearside Exhaust mounting missing |7.1.1c| | 1 |
| Front Brake lever attachment screws missing |3.1.2b| | 1 |
| Front Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Offside Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Offside Rear Brake locking device missing |3.2.A1e| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Offside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Offside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Upper Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Front Front wheel spindle loose |2.3.3a| | 1 |
| Headlamp aim not tested |4.1.2 |b|| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Fuel system component leaking excessively or a risk of fire fuel tap |6.1.3 |b| |ii|| | 1 |
| Fuel system component leaking excessively or a risk of fire carbs |6.1.3 |b| |ii|| | 1 |
| Rear Brake locking device insecure |3.2.A1e| | 1 |
| Front Riders seat insecure |6.2.1a| | 1 |
| Offside Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Footrest missing both rear |6.2.12 |a|| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Centre Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Lower Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Indicator switch defective |1.5.4| | 1 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Front Brake pipe union leaking fluid |3.2.B4| | 1 |
| Front Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Front wheel insecure |4.2.3b| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Footrest insecure |6.2.1a| | 1 |
| Front Brake lever attachment screws loose |3.1.2b| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Nearside Rear Rear position lamp|s| incorrect colour |1.1.A.3e| | 1 |
| Offside Rear position lamp|s| incorrect colour |1.1.A.3e| | 1 |
| Brake cable has wires broken and is significantly weakened |3.5.1b| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Steering control handlebar movement restricted by cables caught on a projection |2.1.2c| | 1 |
| Front wheel spindle loose |2.3.3a| | 1 |
| Rear All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Front position lamp adversely affected by the operation of another lamp n/s indicators |1.1.3b| | 1 |
| Throttle operating incorrectly very very slow returning |6.2.1f| | 1 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Nearside Rear Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Rear Brake pipe union leaking fluid |3.2.B4| | 1 |
| Rear Direction indicator obscured |1.5.1a| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Brake hose damaged | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 1 |
| Offside Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Fuel hose leaking |7.2.1a| | 1 |
| Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Indicator tell tale not operating correctly when turning they both come on |1.5.2| | 1 |
| Brake lever attachment screws loose |3.1.2b| | 1 |
| Front Footrest insecure Safety clips missing |6.2.12 |a|| | 1 |
| Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Stop lamp affected by the operation of another lamp headlight comes on |1.3.2| | 1 |
| Rear Brake rod excessively damaged |3.2.A1c| | 1 |
| Rear Wheel spoke cracked. |4.2.1b| | 1 |
| Front Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Offside Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Offside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Headlamp switch faulty |1.2.4| | 1 |
| Nearside Drive chain excessively loose |6.2.1d| | 1 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Front Fuel system component leaking |7.2.1a| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Throttle control functioning such that safe operation of the motorcycle is adversely affected hand grip rubber loose |6.2.7 |a| |ii|| | 1 |
| Offside Rear Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Offside Front Steering lock stop ineffective |2.1.3| | 1 |
| Nearside Rear Drive chain excessively tight |6.2.1d| | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Front Brake master cylinder leaking (1.1.10 (b) (ii)) | 1 |
| Rear Brake component insecure (1.1.21 (c)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Dipswitch does not operate immediately when selected on dipped beam both filaments on. wired incorrectly (4.1.3 (b)) | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Brake fluid contaminated (1.8 (a)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |