| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 42 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 16 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 14 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 13 |
| Rear reflector on motorcycle missing |1.4.1| | 12 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Drive chain excessively loose |6.2.1d| | 10 |
| Headlamp aim beam image kick up to the offside |1.6| | 9 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 7 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 7 |
| Drive chain worn to excess |6.2.1e| | 6 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 6 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Registration plate issues | 6 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 5 |
| Drive chain excessively tight |6.2.1d| | 5 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 5 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 5 |
| Horn not working |1.7.3a| | 4 |
| Offside Front Direction indicator not working |1.5.1c| | 4 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Rear Brake locking device missing |3.2.A1e| | 4 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 3 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 3 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Front wheel spindle securing nut|s| loose |2.3.3a| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Rear Stop lamp damaged and function impaired |1.3.3a| | 2 |
| Offside Handlebar deformed |2.1.1b| | 2 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 2 |
| Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Rear Brake excessively binding |1.2.1 |f|| | 2 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 2 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Horn missing |1.7.1| | 1 |
| Front Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Front Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Offside Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 1 |
| Centre Front Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear suspension has corrosion which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Offside Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Front suspension assembly has an insecure fork brace |2.3.4d| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Front Fuel system component leaking |7.2.1a| | 1 |
| Front Position lamp switch does not operate the front and rear position lamps |1.1.4c| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Offside Drive chain excessively loose |6.2.1d| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Offside Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Roller brake test indicates a binding brake front |3.3.A1a| | 1 |
| Roller brake test indicates a binding brake rear |3.3.A1a| | 1 |
| Direction indicator damaged and function impaired not attached ,hanging down |1.5.3a| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front wheel bearings are excessively tight |2.3.5b| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Headlamp incorrect colour |1.2.1| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Front position lamp missing |1.1.1a| | 1 |
| Front Brake component damaged and seriously reduced in strength |3.2.A1| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear suspension bearing excessively deteriorated |2.4A.2a|i|| | 1 |
| Nearside Handlebar deformed |2.1.1b| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Steering control handlebar movement restricted by cables caught on a projection |2.1.2c| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Brake lever cracked |3.1.2c| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Offside Front Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Centre Fuel system component leaking |7.2.1a| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Front Brake disc contaminated |1.1.14 |b|| | 1 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Centre Front Horn not working |1.7.3a| | 1 |
| Centre Rear Stop lamp missing |1.3.3a| | 1 |
| Offside Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Front Front wheel insecure |4.2.3b| | 1 |
| Rear Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Front Upper Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Brake pedal is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Centre Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Handlebar mounting clamp loose |2.1.1a| | 1 |
| Offside Steering lock stop maladjusted |2.1.3| | 1 |
| Offside Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Headlamp switch insecure |1.2.4| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Nearside Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Offside Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Lower Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Handlebar mounting insecure (2.2.1 (a) (i)) | 1 |
| Front Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Nearside Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Headlamp aim beam image too far to the right |1.6.4| | 1 |
| Front Headlamp aim not tested |1.6| | 1 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear Brake pipe inadequately supported |3.2.B2b| | 1 |
| Front Motorcycle structure cracked |6.1.1a| | 1 |
| Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Fuel tank leaking |7.2.1a| | 1 |
| Front Indicator tell tale not functioning |1.5.2| | 1 |
| Motorcycle structure cracked |6.1.1a| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Rear Lower Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Nearside Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Steering headbearing in such a condition that steering control is adversely affected |2.2.2 |f| |ii|| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear mono-shock pivot seized |2.4.B.4| | 1 |
| Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Front Headlamp switch faulty |1.2.4| | 1 |
| Brake caliper|s| insecure |3.2.A1j| | 1 |
| Steering lock stop loose |2.1.3| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Brake performance not tested rear brake stuck on too much |1.2.1 |g|| | 1 |
| Brake lever attachment screws loose |3.1.2b| | 1 |
| Brake lever mounting insecure |3.1.2a| | 1 |
| Rear Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Front Horn not working (7.7 (a)) | 1 |
| Front Brake lining(s) contaminated (1.1.13 (b)) | 1 |
| Rear Brake disc|s| securing bolt|s| loose |3.2.A1g| | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Rear Brake back plate|s| insecure |3.2.A1j| | 1 |
| Brake locking device insecure |3.2.A1e| | 1 |
| Front position lamp damaged and function impaired |1.1.1b| | 1 |
| Front Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Centre Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Seat insecure |6.2.1a| | 1 |
| Rear Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Brake hose which buldges |3.2.B4| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Headlamp aim not tested |1.6| | 1 |