| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 35 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 19 |
| Registration plate issues | 13 |
| Drive chain excessively loose |6.2.1d| | 11 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Headlamp aim beam image kick up to the offside |1.6| | 6 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear Drive chain worn to excess |6.2.1e| | 5 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 5 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| Rear Drive chain excessively loose |6.2.1d| | 4 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Horn not working |1.7.3a| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 4 |
| 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| | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Rear reflector on motorcycle missing |1.4.1| | 3 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Offside Front Direction indicator not working |1.5.1c| | 3 |
| Registration plate lamp issues | 3 |
| Nearside Front Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Front Position lamp not working (4.2.1 (a)) | 3 |
| Offside Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Nearside Direction indicators not working |1.5.1c| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Nearside Front Direction indicator insecure |1.5.3b| | 2 |
| Offside Front Direction indicator insecure |1.5.3b| | 2 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Offside Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Offside Rear Footrest insecure |6.2.1a| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Offside Front Headlamp not working on dipped beam dip and high beam not working on offside headlight |4.1.1 |a| |ii|| | 1 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Steering headbearing excessively stiff or notchy Headstock bearings excessivley stiff (2.2.2 (f) (i)) | 1 |
| Headlamp aim not tested Headlamp aim not tested due to dipped beam not working (4.1.2 (b)) | 1 |
| Headlamp not working on dipped beam Dipped beam not working (4.1.1 (a) (ii)) | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Front position lamp missing |1.1.1a| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Nearside Front Lower Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Offside Front Lower Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Nearside Rear Lower Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Rear Footrest insecure (6.2.12 (a)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Nearside Steering operation restricted in free movement from lock to lock wiring preventing free movement from lock to lock (2.1.4 (c)) | 1 |
| Front Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear position lamp 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 |
| Lower Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Offside Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Front Clutch lever bent so it cannot be readily operated. |6.2.1g| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Brake disc significantly and obviously worn |1.1.14 |a| |i|| | 1 |
| Nearside Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear position lamp missing |1.1.1a| | 1 |
| Nearside Rear Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Outer Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Rear Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Rear Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Rear Exhaust silencer insecure (8.1.1 (b) (i)) | 1 |
| Nearside Rear Drive chain worn to excess |6.2.1e| | 1 |
| Nearside Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Lower Exhaust excessively deteriorated |7.1.1a| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Offside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Front Roller brake test indicates a binding brake (3.3.A1a) | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Offside Brake pedal cracked |3.1.2c| | 1 |
| Offside Brake pedal insecure |3.1.2a| | 1 |
| Offside Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Offside Footrest missing |6.2.12 |a|| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Exhaust is leaking and excessively noisey broken at link pipe |7.1.1b| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Offside Front Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Rear wheel insecure |4.2.3b| | 1 |
| Rear Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Nearside Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Direction indicators flashing more than 120 times per minute all |1.5.1c| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Drive chain excessively loose |6.2.1d| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil front n/s fork seal leaking excessively |2.3.3| | 1 |
| Offside Rear Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies reconnected wiring plug |1.3.1a| | 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 has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Exhaust silencer insecure (8.1.1 (b) (i)) | 1 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Brake pedal has insufficient reserve travel |1.1.2 |a|| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Rear Drive chain sprocket excessively loose (6.1.7 (c) (i)) | 1 |
| Stop lamp does not illuminate immediately a brake applies rear switch broken |1.3.1a| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Front Handlebar deformed |2.1.1b| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Stop lamp does not illuminate immediately a brake applies rear switch |1.3.1a| | 1 |
| Fuel system component leaking excessively or a risk of fire From O/S carburettors |6.1.3 |b| |ii|| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Nearside Front Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Rear Stop lamp switch with a delay in operation Foot pedal (4.3.2 (a) (ii)) | 1 |
| Offside Front Direction indicator missing (4.4.1 (a) (ii)) | 1 |
| Nearside Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Nearside Front Brake disc contaminated |1.1.14 |b|| | 1 |
| Offside Front Brake disc contaminated |1.1.14 |b|| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Throttle operating incorrectly |6.2.1f| | 1 |
| Front Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |