| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 46 |
| Registration plate issues | 43 |
| 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| | 15 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 15 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 13 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 11 |
| Rear reflector on motorcycle missing |1.4.1| | 10 |
| Registration plate lamp issues | 10 |
| Drive chain worn to excess |6.2.1e| | 8 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 7 |
| Front wheel bearings have excessive free play |2.3.5b| | 7 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 6 |
| Rear reflector missing |4.8.2 |a| |ii|| | 6 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 5 |
| Throttle operating incorrectly |6.2.1f| | 5 |
| Drive chain excessively loose |6.2.1d| | 5 |
| Horn not working |1.7.3a| | 5 |
| Rear Drive chain excessively loose |6.2.1d| | 5 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 4 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Rear Brake excessively binding (1.2.1 (f)) | 3 |
| Front position lamp incorrect colour |1.1.2a| | 3 |
| Horn not working (7.7 (a) (ii)) | 3 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 3 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 2 |
| Indicator tell tale not functioning |1.5.2| | 2 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 2 |
| Offside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Stop lamp obscured |1.3.1c| | 2 |
| Front Brake disc|s| cracked |3.2.A1g| | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 2 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Rear Brake excessively binding |1.2.1 |f|| | 2 |
| Offside Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Nearside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Handlebar mounting excessively deteriorated |flexible type| |2.1.1d| | 2 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Rear Brake component insecure Split pin missing (1.1.21 (c)) | 1 |
| Rear Wheel spindle locking device missing (5.2.1 (d)) | 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 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Rear 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 Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Rear Brake cable excessively corroded |3.2.A1b| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Motorcycle structure joining/attachment plate or fastening insecure (6.1.1 (b) (i)) | 1 |
| Offside Upper Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition (8.1.1 (a)) | 1 |
| Offside Lower Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition (8.1.1 (a)) | 1 |
| Rear Position lamp light intensity significantly reduced Positioned in front of, and obscured by rear fender (4.2.3 (a) (ii)) | 1 |
| Front Direction indicator obviously incorrectly positioned Less than 240mm apart (4.4.3 (a)) | 1 |
| Rear Direction indicator obviously incorrectly positioned Less than 180mm apart (4.4.3 (a)) | 1 |
| Front Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Front Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 1 |
| Headlamp light source and lamp not compatible Both headlamp bulb fillaments illuminated in both high and low positions causing incorrect beam pattern (4.1.4 (c)) | 1 |
| Brake component inadequately mounted Rear brake torque arm (front) bolt split pin missing (1.1.21 (c)) | 1 |
| Headlamp aim not tested Both headlamp filaments illuminating causing incorrect beam (4.1.2 (b)) | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Front Wheel bearing play so excessive that directional control is impaired (5.1.3 (a) (ii)) | 1 |
| Throttle operating incorrectly OPENS WHEN TURNING LEFT |6.2.7 |a| |i|| | 1 |
| Front Brake lever has restricted free movement |1.1.15 |e|| | 1 |
| Steering operation restricted in free movement from lock to lock NOTCHY |2.1.4 |c|| | 1 |
| Rear Motorcycle structure joining/attachment plate or fastening insecure Rear sub frame fixings loose. (6.1.1 (b) (i)) | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Stop lamp not working Front brake |4.3.1 |a| |ii|| | 1 |
| Rear Suspension attachment bracket/mounting insecure |5.3.3 |a| |i|| | 1 |
| Stop lamp not working Switch seized. OK. (4.3.1 (a) (ii)) | 1 |
| Nearside Rear Drive chain worn to excess |6.2.1e| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Pillion seat insecure |6.2.6 |a| |ii|| | 1 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Offside Handlebar fouling on the fuel tank or bodywork on full lock |2.1.4 |b|| | 1 |
| Stop lamp not working brake lever switch (4.3.1 (a) (ii)) | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Brake excessively binding |1.2.1 |f|| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear reflector missing no rear reflector (4.8.2 (a) (ii)) | 1 |
| Front Upper Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front Lower Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 1 |
| Front Lower Front mudguard insecure |2.3.7| | 1 |
| Sidecar direction indicator missing |1.5.1a| | 1 |
| Rear position lamp obscured more than 50% |1.1.1d| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Offside Front Stop lamp does not illuminate immediately a brake applies front brake light switch is sticking |1.3.1a| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear Brake pedal is inoperative |3.1.3c| | 1 |
| Rear Suspension arm corroded and seriously weakened (5.3.3 (b) (i)) | 1 |
| Rear mono-shock pivot seized |2.4.B.4| | 1 |
| Stop lamp not working Front control (4.3.1 (a) (ii)) | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Rear Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Stop lamp not working control 1 (4.3.1 (a) (ii)) | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Offside Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Rear Gradient brake test indicates a binding brake |3.3.D1c| | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Front An item not tested |Manual| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| An item not tested |Manual| | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Lower Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected sticking |6.2.7 |a| |ii|| | 1 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Exhaust silencer insecure |8.1.1 |b| |i|| | 1 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Front Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Nearside Rear Motorcycle structure is fractured and structural rigidity is significantly reduced swing arm holed due to bolt too long |6.1.1 |a| |i|| | 1 |
| Nearside Footrest insecure |6.2.12 |a|| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 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 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Steering operation fouling on the fuel tank or bodywork on full lock |2.1.4 |b|| | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Offside Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Offside Rear suspension component excessively corroded. |2.4.A.1a| | 1 |
| Rear Brake linkage has restricted free movement |1.1.15 |e|| | 1 |
| Front Outer Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Position lamp not working (4.2.1 (a)) | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Nearside Front Horn not working |1.7.3a| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Centre Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Front Throttle operating incorrectly |6.2.1f| | 1 |
| Front Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 1 |
| Brake lever mounting insecure |3.1.2a| | 1 |
| Drive belt guard insecure |6.2.1c| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Front Brake disc|s| excessively pitted |3.2.A1l| | 1 |
| Front Position lamp missing (4.2.1 (a)) | 1 |
| Offside Stop lamp not working FOOT CONTROL (4.3.1 (a) (ii)) | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Front Direction indicator incorrect colour white light (4.4.3 (a)) | 1 |
| Offside Front Direction indicator incorrect colour white light (4.4.3 (a)) | 1 |
| Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Nearside Front Front position lamp flickers when tapped lightly by hand |1.1.3c| | 1 |
| Offside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Centre Rear Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Headlamp at least one does not illuminate on main beam Main beam in op |1.2.2a|ii|| | 1 |
| Front wheel bearings have excessive free play Front wheel bearings have excess movement in them |2.3.5b| | 1 |
| Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition |8.1.1 |a|| | 1 |
| Throttle operating incorrectly |6.2.7 |a| |i|| | 1 |
| Rear 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 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Centre Rear Rear position lamp does not illuminate immediately when it is switched on number plate lamp |1.1.3a| | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition (8.1.1 (a)) | 1 |
| Brake reaction bracket insecure Split pin missing |3.2.A1j| | 1 |
| Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Indicator switch defective |1.5.4| | 1 |
| All direction indicators missing |4.4.1 |a| |ii|| | 1 |
| Riders seat insecure |6.2.5 |a| |ii|| | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Suspension component pin or bush excessively worn lower front rocker arm link bearing (5.3.4 (a) (i)) | 1 |
| Stop lamp does not illuminate immediately a brake applies rear control |1.3.1a| | 1 |
| Sidecar rear position lamp obscured more than 50% |1.1.1d| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Centre Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |