| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 32 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 16 |
| Drive chain excessively loose |6.2.1d| | 12 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Front wheel bearings have excessive free play |2.3.5b| | 9 |
| Registration plate issues | 9 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 8 |
| Front wheel bearings are excessively rough |2.3.5b| | 6 |
| Rear reflector on motorcycle missing |1.4.1| | 6 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 5 |
| Throttle operating incorrectly |6.2.1f| | 5 |
| Horn not working |1.7.3a| | 5 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 5 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 4 |
| Front Brake excessively binding (1.2.1 (f)) | 4 |
| Front Brake excessively binding |1.2.1 |f|| | 3 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 3 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Rear Brake excessively binding (1.2.1 (f)) | 3 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 2 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Rear Brake hose leaking fluid |3.2.B4| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Offside Rear Direction indicator insecure |1.5.3b| | 2 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Stop lamp insecure |1.3.3b| | 2 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Rear Brake disc|s| cracked |3.2.A1g| | 2 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Horn not working (7.7 (a)) | 2 |
| Rear Footrest missing |6.2.1a| | 1 |
| Centre Exhaust excessively deteriorated |7.1.1a| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Nearside Brake disc|s| securing bolt|s| loose |3.2.A1g| | 1 |
| Steering lock stop ineffective |2.1.3| | 1 |
| Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Fuel tank insecure |6.1.3 |a| |i|| | 1 |
| Offside Front Brake disc fractured |1.1.14 |a| |ii|| | 1 |
| Rear Brake disc fractured |1.1.14 |a| |ii|| | 1 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Brake hose damaged | 1 |
| Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Front Brake pipe inadequately supported |3.2.B2b| | 1 |
| Central Rear Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Chain guard insecure |6.2.1c| | 1 |
| Front Stop lamp not working switch |4.3.1 |a| |ii|| | 1 |
| Centre Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Nearside Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Offside Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Nearside Front Lower Brake pipe union leaking fluid |3.2.B4| | 1 |
| Nearside Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Front Front wheel has a loose wheel bolt|s| |4.2.3a| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Rear Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Headlamp switch faulty hi/low |1.2.4| | 1 |
| Front Steering headbearing has excessive free play Locking nut insecure! |2.2.2| | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Brake hose leaking fluid |3.2.B4| | 1 |
| Outer Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Inner Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Offside Rear Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Offside Rear Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Nearside Indicator tell tale not functioning |1.5.2| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Centre Lower Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Centre Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Offside Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Offside Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Fuel system component insecure petrol tank loose? |7.2.1b| | 1 |
| Rear Brake disc contaminated |1.1.14 |b|| | 1 |
| Brake locking device missing Front pad pin locking devise. |3.2.A1e| | 1 |
| Brake locking device missing Rear pad pin locking devise. |3.2.A1e| | 1 |
| Rear Brake locking device missing Rear torque arm bolt split pin missing. |3.2.A1e| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Rear Exhaust has part of the system missing |7.1.1a| | 1 |
| Headlamp aim not tested |4.1.2 |b|| | 1 |
| Headlamp light source and lamp not compatible |4.1.4 |c|| | 1 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Brake hose fouling |3.2.B3b| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Nearside Front Brake component insecure |1.1.21 |c|| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Lower Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Indicator switch defective |1.5.4| | 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 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Stop lamp does not illuminate immediately a brake applies when rear brake applied |1.3.1a| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Front mudguard insecure |2.3.7| | 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 |
| Registration plate lamp issues | 1 |
| Nearside Front Upper Handlebar fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Offside Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 1 |
| Rear Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 1 |
| Brake component insecure rear caliper locking device missing (1.1.21 (c)) | 1 |
| Front Wheel bearing play so excessive that directional control is impaired (5.1.3 (a) (ii)) | 1 |
| Rear Brake disc fractured (1.1.14 (a) (ii)) | 1 |
| Offside Front Brake cylinder leaking and braking performance affected (1.1.16 (b) (ii)) | 1 |
| Rear Brake component inadequately mounted Locking device missing (1.1.21 (c)) | 1 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak front left fork leaking excessively (5.3.2 (b)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Fuel system component leaking (6.1.3 (b) (i)) | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Nearside Rear Position lamp not working (4.2.1 (a)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Nearside Front Handlebar fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |