| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 69 |
| Rear reflector on motorcycle missing |1.4.1| | 25 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 22 |
| Horn not working |1.7.3a| | 15 |
| Drive chain excessively loose |6.2.1d| | 13 |
| Drive chain excessively tight |6.2.1d| | 9 |
| Registration plate issues | 8 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 7 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 6 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Rear 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 |
| Steering headbearing has excessive free play |2.2.2| | 5 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 5 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 4 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Handlebar deformed |2.1.1b| | 4 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Rear Drive chain excessively tight |6.2.1d| | 3 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 2 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 2 |
| Offside Front Direction indicator insecure |1.5.3b| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Offside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Front Brake disc contaminated (1.1.14 (b)) | 2 |
| Fuel system component leaking |7.2.1a| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 2 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 2 |
| Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Offside Front Brake pipe union leaking fluid banjo |3.2.B4| | 1 |
| Central Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Front Front mudguard insecure |2.3.7| | 1 |
| Nearside Rear Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Wheel alignment incorrect which adversely affects the steering |2.4 |a|| | 1 |
| Handlebar deformed to the extent that steering is affected |2.2.1 |c| |ii|| | 1 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Nearside Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Shock absorber has a serious fluid leak Both |5.3.2 |b|| | 1 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Front Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Handlebar excessively deformed (2.2.1 (c) (i)) | 1 |
| Offside Front Shock absorber has a serious fluid leak Fork seal (5.3.2 (b)) | 1 |
| Rear Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Rear Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Fuel tank insecure |6.1.3 |a| |i|| | 1 |
| Throttle operating incorrectly Throttle not returning |6.2.7 |a| |i|| | 1 |
| Front Suspension component modified so the suspension is inoperative |5.3.3 |c| |ii|| | 1 |
| Headlamp insecure |4.1.1 |c|| | 1 |
| Nearside Rear Position lamp not working |4.2.1 |a|| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Chain guard insecure |6.1.7 |i|| | 1 |
| Central Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride chain split link |6.2.1h| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Front shock absorber seal failed and leaking oil r/h |2.3.3| | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Central Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Brake pedal not releasing correctly and functionality of brakes affected |1.1.2 |b| |ii|| | 1 |
| Front Direction indicator obviously incorrectly positioned Distance between ind, less than 240mm (4.4.3 (a)) | 1 |
| Throttle operating incorrectly throttle accelerates or engine cuts out on right hand lock (6.2.7 (a) (i)) | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Offside Front Upper Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Centre Rear Lower Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Centre Front Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Nearside Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Rear Motorcycle structure corroded to the extent that the rigidity of the assembly is significantly reduced swingimg arm has rust holes in it (6.1.1 (c) (i)) | 1 |
| Front Headlamp aim not tested (4.1.2 (b)) | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Fuel system component leaking carb (6.1.3 (b) (i)) | 1 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Drive chain sprocket so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Stop lamp remains on when the brake is released brake |1.3.1e| | 1 |
| Offside Front Lower Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Rear Lower Drive chain excessively loose |6.2.1d| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Brake back plate|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Front Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Throttle operating incorrectly |6.2.7 |a| |i|| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected |6.2.7 |a| |ii|| | 1 |
| Headlamp light intensity severely reduced (4.1.4 (a)) | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Front Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 1 |
| Nearside Direction indicator missing |1.5.1a| | 1 |
| Offside Direction indicator missing |1.5.1a| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Rear Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Front Horn not working (7.7 (a) (ii)) | 1 |
| Nearside Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Offside Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Offside Rear Stop lamp not working front lever brake (4.3.1 (a) (ii)) | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Rear Brake caliper|s| insecure |3.2.A1j| | 1 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Rear brake disc in such a condition that it is seriously weakened | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Rear reflector on sidecar missing |1.4.1| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 1 |
| Offside Rear Footrest missing (6.2.12 (a)) | 1 |
| Fuel pipe damaged (6.1.3 (c) (ii)) | 1 |
| Rear Brake hose excessively damaged |1.1.12 |b| |ii|| | 1 |
| Front Brake disc contaminated |1.1.14 |b|| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Nearside Front Shock absorber has a serious fluid leak left side fork seal oil leak (5.3.2 (b)) | 1 |
| Stop lamp not working Stop light not working from control 2 .. (4.3.1 (a) (ii)) | 1 |
| Stop lamp switch with a delay in operation Not working from control 2 .. (4.3.2 (a) (ii)) | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Front Brake caliper inadequately mounted (1.1.16 (c) (i)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Brake lever has abnormal movement of levers indicating excessive wear or maladjustment (1.1.15 (f)) | 1 |
| Offside Drive chain excessively loose adjuster (6.1.7 (c) (i)) | 1 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Front position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Nearside Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Suspension attachment bracket/mounting insecure fork brace lower (5.3.3 (a) (i)) | 1 |
| Central Rear Lower Suspension component pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Stop lamp light intensity significantly reduced |4.3.3 |a| |ii|| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Fuel hose leaking |7.2.1a| | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Offside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Rear Brake disc|s| securing bolt|s| loose |3.2.A1g| | 1 |