| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 44 |
| Drive chain excessively loose |6.2.1d| | 19 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 15 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 12 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 12 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 10 |
| Steering headbearing has excessive free play |2.2.2| | 9 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 8 |
| Horn not working |1.7.3a| | 8 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 8 |
| Registration plate issues | 7 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 7 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 6 |
| Throttle operating incorrectly |6.2.1f| | 5 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 5 |
| Stop lamp remains on when the brake is released |1.3.1e| | 5 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 5 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 5 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Handlebar deformed |2.1.1b| | 4 |
| Riders seat insecure |6.2.1a| | 4 |
| Rear Brake disc|s| cracked |3.2.A1g| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 3 |
| Stop lamp remains on when the brakes are released | 3 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Rear Roller brake test indicates a severely juddering brake |3.3.A1b| | 2 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Offside Front Footrest insecure |6.2.1a| | 2 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 2 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Front Position lamp not working |4.2.1 |a|| | 2 |
| Front Position lamp not working (4.2.1 (a)) | 2 |
| Offside Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| 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| | 2 |
| Drive chain fouling another component |6.2.1d| | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Front Valve stem seriously damaged |5.2.3 |j|| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 2 |
| Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Indicator switch inoperative |4.4.2 |a| |ii|| | 1 |
| Front wheel spindle securing nut locking device insecure |2.3.5a| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing steering bearings worn |2.2.1a| | 1 |
| Offside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Front Front position lamp incorrect colour |1.1.2a| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Nearside Rear Drive chain sprocket excessively loose (6.1.7 (c) (i)) | 1 |
| Steering headbearing excessively stiff or notchy Notchy (2.2.2 (f) (i)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Offside Rear Wheel bearing has excessive play (5.1.3 (a) (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 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Stop lamp missing |1.3.3a| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering Mirrors foul on windscreen |2.1.2a| | 1 |
| Rear Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Rear Brake indicates excessive fluctuation of brake effort rear disc warped |1.2.1 |e|| | 1 |
| Throttle operating incorrectly does not return |6.2.7 |a| |i|| | 1 |
| Front Brake disc fractured (1.1.14 (a) (ii)) | 1 |
| Front brake disc in such a condition that it is seriously weakened | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Brake pipe likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Nearside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Rear Footrest missing (6.2.12 (a)) | 1 |
| Rear Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Rear suspension component excessively corroded. |2.4.A.1a| | 1 |
| Nearside Rear Direction indicator missing (4.4.1 (a) (ii)) | 1 |
| Clutch lever positioned so it cannot be readily operated lever insecure so keeps changing position (6.2.7 (b)) | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Shock absorber has negligible damping effect Both front (5.3.2 (b)) | 1 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 1 |
| Front Brake lever has insufficient reserve travel pulls back until it stops on heated grip wire (1.1.2 (a)) | 1 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Nearside Front Footrest missing |6.2.1a| | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Footrest missing |6.2.1a| | 1 |
| Stop lamp not working front brake (4.3.1 (a) (ii)) | 1 |
| Motorcycle structure corroded to the extent that the rigidity of the assembly is significantly reduced swinging arm (6.1.1 (c) (i)) | 1 |
| Chain guard insecure Missing |6.2.1c| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Front Outer Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Handlebar mounting excessively deteriorated |flexible type| |2.1.1d| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Headlamp incorrect colour |1.2.1| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Front Brake lever is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |
| Nearside Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Throttle operating incorrectly sticking on |6.2.1f| | 1 |
| Stop lamp insecure |1.3.3b| | 1 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Offside Front suspension assembly component excessively corroded. |2.3.1| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected |6.2.7 |a| |ii|| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Offside Rear Brake pedal attachment screws loose |3.1.2b| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Offside Front Throttle operating incorrectly |6.2.1f| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Inner Front Lower Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Offside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Nearside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Indicator switch defective |1.5.4| | 1 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Offside Rear Sidecar structure joining/attachment plate or fastening so insecure that structural rigidity is seriously reduced (6.1.1 (b) (ii)) | 1 |
| Centre Rear Lower Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Rear Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Throttle operating incorrectly sticks open on right hand lock |6.2.1f| | 1 |
| Rear suspension bush excessively deteriorated swing arm bushes have excessive free play |2.4.A2a|i|| | 1 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Offside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Riders seat with a defective supporting structure does not lock down |6.2.5 |a| |i|| | 1 |
| Steering headbearing excessively stiff or notchy notchy |2.2.2 |f| |i|| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Front Indicator switch defective |1.5.4| | 1 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Nearside Rear Shock absorber has an excessively worn bush lower bush (5.3.2 (c)) | 1 |
| Offside Rear Shock absorber has an excessively worn bush lower bush (5.3.2 (c)) | 1 |
| Fuel cap ineffective cap not opening with key |6.1.3 |b| |i|| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Rear Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Rear Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Rear Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Offside Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Footrest insecure (6.2.12 (a)) | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Front Upper Indicator switch insecure |1.5.4| | 1 |
| Centre Rear Upper Stop lamp insecure |1.3.3b| | 1 |
| Offside Rear Lower Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Centre Front Horn control defective |1.7.2a| | 1 |
| Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Front suspension fouling which affects the movement of the front suspension. |2.3.6a| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Exhaust system insecure (6.1.2 (a)) | 1 |
| Rear Wheel spindle loose (5.2.1 (c) (i)) | 1 |
| Central Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Handlebar deformed mount |2.1.1b| | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Offside Front Brake excessively binding FRONT BRAKE CALIPER BINDING |1.2.1 |f|| | 1 |
| Offside Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Floor brake test indicates a severely juddering brake |3.3C2d.| | 1 |
| Front Horn not working |1.7.3a| | 1 |