| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 63 |
| Drive chain excessively loose |6.2.1d| | 33 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 17 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 16 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 15 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Drive chain worn to excess |6.2.1e| | 9 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 7 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 6 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 5 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 5 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 4 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 4 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 4 |
| Registration plate issues | 3 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 3 |
| Front Brake excessively binding (1.2.1 (f)) | 3 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Handlebar deformed |2.1.1b| | 3 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 2 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear Position lamp not working |4.2.1 |a|| | 2 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Horn not working |1.7.3a| | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Handlebar excessively deformed (2.2.1 (c) (i)) | 1 |
| Motorcycle structure joining/attachment plate or fastening insecure Front engine bolt missing. (6.1.1 (b) (i)) | 1 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Nearside Drive chain excessively tight |6.2.1d| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Offside Front Brake cylinder severely corroded |3.2.B1b| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Fairing insecure and likely to impede the steering |2.1.2e| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 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 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Horn missing |1.7.1| | 1 |
| Offside Front Upper Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Front Brake disc contaminated |1.1.14 |b|| | 1 |
| Front Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Offside Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Stop lamp missing |4.3.1 |a| |ii|| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Drive chain sprocket carrier worn to excess excessive play in rubber bushes |6.2.1e| | 1 |
| Drive chain sprocket worn to excess Cush drive (6.1.7 (c) (i)) | 1 |
| Headlamp switch insecure |1.2.4| | 1 |
| Rear Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Front Brake master cylinder leaking |1.1.10 |b| |ii|| | 1 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Nearside Rear Drive chain worn to excess |6.2.1e| | 1 |
| Nearside Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Drive chain excessively loose |6.2.1d| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies inop |1.3.1a| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride clip missing |6.2.1h| | 1 |
| Fuel system component leaking carb overflowing |6.1.3 |b| |i|| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Front Horn control not functioning. |1.7.2b| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking fuel tank. |6.1.1c| | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Front Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear Brake pedal is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Stop lamp does not illuminate by the operation of both brake controls front switch not working (4.3.2 (a) (iii)) | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Horn not working (7.7 (a)) | 1 |
| Front Brake caliper insecure (1.1.16 (c) (i)) | 1 |
| Brake performance not tested (1.2.1 (g)) | 1 |
| Dipswitch does not operate immediately when selected on main beam |4.1.3 |b|| | 1 |
| Front Upper Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear mono-shock insecure |2.4.B.4| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Stop lamp not working From both controls. |4.3.1 |a| |ii|| | 1 |
| Centre Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Front Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Brake pedal not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Throttle operating incorrectly revs up when turned to the right (6.2.7 (a) (i)) | 1 |
| Front Brake disc contaminated covered in oil (1.1.14 (b)) | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 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 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Registration plate lamp issues | 1 |
| Front Horn not working |1.7.3a| | 1 |