| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 38 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 9 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 5 |
| Steering headbearing has excessive free play |2.2.2| | 5 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 5 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Front wheel bearings are excessively rough |2.3.5b| | 4 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Registration plate lamp issues | 3 |
| Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Registration plate issues | 3 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Drive chain excessively loose |6.2.1d| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Front Brake excessively binding |1.2.1 |f|| | 2 |
| Nearside Front Brake disc|s| cracked |3.2.A1g| | 2 |
| Front Brake caliper damaged and braking performance affected (1.1.16 (a) (ii)) | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Front Brake caliper inadequately mounted (1.1.16 (c) (i)) | 1 |
| Front Footrest insecure (6.2.12 (a)) | 1 |
| Rear Brake fluid reservoir insecurely mounted |3.2.B1a| | 1 |
| Nearside Front Sidecar direction indicator missing |1.5.1a| | 1 |
| Nearside Stop lamp does not illuminate immediately a brake applies Side car |1.3.1a| | 1 |
| Stop lamp does not illuminate immediately a brake applies On front brake lever |1.3.1a| | 1 |
| Sidecar wheel alignment has excessive toe-out |5.3.1a| | 1 |
| Sidecar front position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Lower Sidecar attachment insecure |5.1.1b| | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Rear wheel spindle loose |2.4.A.2b| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Fuel system component leaking Fuel tap |7.2.1a| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear Wheel spindle or securing nut(s) so insecure that wheel security or steering control is adversely affected (5.2.1 (c) (ii)) | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Nearside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Nearside Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Front Brake component is fractured |3.1.5| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Position lamp switch insecure |1.1.4b| | 1 |
| Steering control handlebar movement restricted by cables caught on a projection |2.1.2c| | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Rear Brake hose leaking fluid |3.2.B4| | 1 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Throttle operating incorrectly not returning when on full lock to right |6.2.7 |a| |i|| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Offside Rear Position lamp not working |4.2.1 |a|| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Steering headbearing in such a condition that steering control is adversely affected |2.2.2 |f| |ii|| | 1 |
| Offside Front Brake excessively binding (1.2.1 (f)) | 1 |
| Front Front position lamp incorrect colour |1.1.2a| | 1 |
| Inner Front Lower Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Offside Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Central Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Exhaust system insecure (6.1.2 (a)) | 1 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Footrest insecure Tightened LHS footrest (6.2.12 (a)) | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Stop lamp missing |1.3.3a| | 1 |
| Centre Front Lower Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Footrest insecure |6.2.12 |a|| | 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 |
| Brake performance not tested (1.2.1 (g)) | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Inner Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Handlebar fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Stop lamp not working adjust switch (4.3.1 (a) (ii)) | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Rear Brake caliper insecure (1.1.16 (c) (i)) | 1 |
| Offside Footrest insecure Broken (6.2.12 (a)) | 1 |
| Front Handlebar deformed |2.1.1b| | 1 |
| Front Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Offside Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Centre Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Inner Fuel hose leaking |7.2.1a| | 1 |
| All direction indicators adversely affected by the operation of another lamp both rear indicators affecting rear side light |4.4.3 |b|| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Offside Brake pedal mounting cracked . |3.1.2c| | 1 |
| Lower Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Brake lever attachment screws loose |3.1.2b| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |