| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 33 |
| Drive chain excessively loose |6.2.1d| | 18 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 15 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Registration plate issues | 13 |
| Front wheel bearings have excessive free play |2.3.5b| | 13 |
| Front wheel bearings are excessively rough |2.3.5b| | 12 |
| Horn not working |1.7.3a| | 11 |
| Steering headbearing has excessive free play |2.2.2| | 11 |
| Headlamp aim beam image kick up to the offside |1.6| | 10 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 10 |
| Drive chain worn to excess |6.2.1e| | 9 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 9 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 8 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 7 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 7 |
| Rear Seat insecure |6.2.1a| | 7 |
| Rear reflector on motorcycle missing |1.4.1| | 6 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 6 |
| Seat insecure |6.2.1a| | 6 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Nearside Front Footrest insecure |6.2.1a| | 6 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 5 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 5 |
| Chain guard insecure |6.2.1c| | 5 |
| Nearside Front Direction indicator not working |1.5.1c| | 5 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 5 |
| Offside Front Footrest insecure |6.2.1a| | 5 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Drive chain excessively tight |6.2.1d| | 4 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Riders seat insecure |6.2.1a| | 4 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 4 |
| Nearside Rear Direction indicator not working |1.5.1c| | 4 |
| Rear Drive chain excessively loose |6.2.1d| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Nearside Rear Footrest missing |6.2.1a| | 3 |
| Nearside Footrest insecure |6.2.1a| | 3 |
| Offside Footrest insecure |6.2.1a| | 3 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Rear Footrest missing |6.2.1a| | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 3 |
| Steering control handlebar movement restricted by cables caught on a projection |2.1.2c| | 3 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Headlamp aim not tested |1.6| | 3 |
| Nearside Front Direction indicators not working |1.5.1c| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 3 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Rear Brake pedal is inoperative |3.1.3c| | 2 |
| Rear Brake component is severely distorted |3.1.5| | 2 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Offside Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. (3.3.A2b) | 2 |
| Offside Front Direction indicators not working |1.5.1c| | 2 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Front Riders seat insecure |6.2.1a| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 2 |
| An item not tested |Manual| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 2 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 2 |
| Fuel system component leaking |7.2.1a| | 2 |
| Nearside Steering lock stop ineffective |2.1.3| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Front Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Steering lock stop ineffective |2.1.3| | 2 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Brake pedal cannot be released smoothly |3.1.3d| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Front Direction indicator missing |1.5.1a| | 1 |
| Rear Direction indicator missing |1.5.1a| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Nearside Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Rear Brake component cracked and seriously reduced in strength |3.2.A1| | 1 |
| Nearside Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Inner Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Nearside Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Brake component is excessively corroded |3.1.5| | 1 |
| Rear Rear position lamp insecure |1.1.1c| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Rear Brake master cylinder defective but brake still operating |1.1.10 |b| |i|| | 1 |
| Nearside Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Rear Chain guard insecure |6.2.1c| | 1 |
| Offside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Front Direction indicator missing |1.5.1a| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Brake lever insecure |3.1.2a| | 1 |
| Brake pedal is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear reflector on motorcycle missing (1.4.1) | 1 |
| Rear Brake pedal cracked (3.1.2c) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Front shock absorber seal failed and leaking oil (2.3.3) | 1 |
| Brake lever has inadequate reserve travel (3.1.3b) | 1 |
| Locking device(s) not correctly fitted which may make the motor bicycle dangerous to ride (6.2.1h) | 1 |
| Steering headbearing has excessive free play (2.2.2) | 1 |
| Front Roller brake test indicates a binding brake (3.3.A1a) | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 1 |
| Rear Exhaust mounting does not fully support the exhaust system (7.1.1.c) | 1 |
| Front Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Stop lamp does not illuminate immediately a brake applies from operation of both front and rear brakes |1.3.1a| | 1 |
| Brake pedal has inadequate reserve travel did not lock rollers on brake test when pedal was fully down |3.1.3b| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Offside Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Nearside An item not tested |Manual| | 1 |
| Front Brake caliper|s| insecure |3.2.A1j| | 1 |
| Front Headlamp light intensity severely reduced (4.1.4 (a)) | 1 |
| All position lamps not working (4.2.1 (a)) | 1 |
| Offside Front 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 |
| Brake pedal insecure |3.1.2a| | 1 |
| Brake hose excessively deteriorated | 1 |
| Direction indicator not working all four |1.5.1c| | 1 |
| Stop lamp does not illuminate immediately a brake applies control one |1.3.1a| | 1 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Headlamp aim headlamp deteriorated and function impaired no clear beam pattern |1.2.3a| | 1 |
| Direction indicators flashing more than 120 times per minute all indicators |1.5.1c| | 1 |
| Brake lever cracked sharp edges on the end |3.1.2c| | 1 |
| Stop lamp not working by application of front brake (4.3.1 (a) (ii)) | 1 |
| Nearside Front Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Offside Front Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Nearside Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Offside Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Front Brake component insecure brake caliper (1.1.21 (c)) | 1 |
| Front Brake disc contaminated oil on disc (1.1.14 (b)) | 1 |
| Footrest insecure |6.2.1a| | 1 |
| Brake component has an inadequate repair |3.1.5| | 1 |
| Fairing insecure and likely to impede the steering |2.1.2e| | 1 |
| Front Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Stop lamp not working front lever switch disconnected (4.3.1 (a) (ii)) | 1 |
| Rear Brake disc contaminated (1.1.14 (b)) | 1 |
| Offside Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Rear Brake pedal mounting insecure |3.1.2a| | 1 |
| Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Front Brake caliper leaking |1.1.16 |b| |i|| | 1 |
| Nearside Rear Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Brake linkage has abnormal movement due to excessive wear |3.2.A1i| | 1 |
| Offside Handlebar deformed |2.1.1b| | 1 |
| Rear Exhaust excessively deteriorated |7.1.1a| | 1 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Rear Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Offside Rear Exhaust mounting missing |7.1.1c| | 1 |
| Front Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Rear Brake master cylinder has an excessively worn master cylinder pivot. |3.2.B5| | 1 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Direction indicators flashing more than 120 times per minute all |1.5.1c| | 1 |
| Front Fairings so located that it is likely to impede the steering |2.1.2e| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Offside Front Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Front Steering lock stop ineffective |2.1.3| | 1 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 1 |
| Brake lever is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Inner Rear Lower Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear wheel spindle loose |2.4.A.2b| | 1 |
| Rear Brake pedal insecure |3.1.2a| | 1 |
| Offside Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Exhaust system insecure mounting springs missing (6.1.2 (a)) | 1 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Offside Front Throttle operating incorrectly |6.2.1f| | 1 |
| Centre Rear Footrest missing |6.2.1a| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |
| Front Brake fluid reservoir severely damaged |3.2.B1b| | 1 |
| Rear Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Rear Brake pedal is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Chain guard fouling another component |6.2.1c| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Decelerometer brake test neither brake control achieves an efficiency of 25% |3.3.E1c| | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Headlamp incorrect colour |1.2.1| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Brake pedal attachment screws loose |3.1.2b| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Rear Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Front Front position lamp missing |1.1.1a| | 1 |
| Front Brake disc|s| securing bolt|s| missing |3.2.A1g| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Nearside Brake lever insecure |3.1.2a| | 1 |
| Offside Front Brake lever insecure |3.1.2a| | 1 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Nearside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Stop lamp does not illuminate immediately a brake applies front control |1.3.1a| | 1 |