| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 89 |
| Rear reflector on motorcycle missing |1.4.1| | 26 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 22 |
| Drive chain excessively loose |6.2.1d| | 22 |
| Registration plate issues | 17 |
| Drive chain worn to excess |6.2.1e| | 16 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 14 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 12 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 11 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 10 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 8 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Headlamp aim beam image kick up to the offside |1.6| | 7 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 7 |
| Horn not working |1.7.3a| | 7 |
| Drive chain excessively tight |6.2.1d| | 6 |
| Rear reflector on motorcycle obscured |1.4.1| | 6 |
| Headlamp insecure |1.2.3b| | 6 |
| Front wheel bearings have excessive free play |2.3.5b| | 6 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 5 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 5 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 5 |
| Rear Drive chain worn to excess |6.2.1e| | 5 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 5 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Front Brake excessively binding (1.2.1 (f)) | 4 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Offside Steering lock stop ineffective |2.1.3| | 4 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Headlamp insecure (4.1.1 (c)) | 3 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 3 |
| Front Brake excessively binding |1.2.1 |f|| | 3 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 3 |
| Rear Drive chain excessively loose |6.2.1d| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 3 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 3 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Handlebar deformed |2.1.1b| | 3 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 2 |
| Front Headlamp insecure |1.2.3b| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Horn control defective |1.7.2a| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Rear Brake locking device missing |3.2.A1e| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Chain guard insecure |6.2.1c| | 2 |
| Front suspension assembly component excessively misaligned |2.3.1| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Nearside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 2 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Rear reflector on motorcycle obscured |1.4.2b| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Front Lower Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Brake back plate|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Chain guard insecure (6.1.7 (i)) | 1 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Wheel spoke excessively loose |4.2.1b| | 1 |
| Front position lamp missing |1.1.1a| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear suspension has corrosion which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Headlamp insecure (1.2.3b) | 1 |
| Nearside Rear Drive chain excessively loose (6.2.1d) | 1 |
| Rear Rear reflector on motorcycle missing (1.4.1) | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Offside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected Throttle opens on full right lock |6.2.7 |a| |ii|| | 1 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Nearside Drive chain excessively loose |6.2.1d| | 1 |
| Rear Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Rear Floor brake test indicates a severely grabbing brake |3.3.C2d| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Rear Suspension arm corroded and seriously weakened Swingarm corroded on brace (5.3.3 (b) (i)) | 1 |
| Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Nearside Front Lower Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Nearside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Front Brake locking device missing |3.2.A1e| | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Brake pedal is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Brake component modification unsafe locking nut missing from rear brake rod (1.1.21 (d) (i)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Front Steering lock stop ineffective |2.1.3| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Front Handlebar deformed |2.1.1b| | 1 |
| Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Front Indicator switch insecure |1.5.4| | 1 |
| An item not tested |Manual| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Brake lever excessively worn Lever on the drum insecure worn out spline on lever. |1.1.15 |b|| | 1 |
| Front Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Rear 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 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front Brake caliper leaking |1.1.16 |b| |i|| | 1 |
| Front Brake disc contaminated |1.1.14 |b|| | 1 |
| Plate brake test No brake control achieves an efficiency of 30% |1.2.2 |a| |i|| | 1 |
| Headlamp light source and lamp not compatible |4.1.4 |c|| | 1 |
| Nearside Rear Chain guard insecure |6.1.7 |i|| | 1 |
| Offside Front Brake fluid significantly below minimum mark |1.1.10 |d| |ii|| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Centre Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Offside Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Front Steering lock stop maladjusted |2.1.3| | 1 |
| Front Headlamp damaged and function impaired |1.2.3a| | 1 |
| Offside Rear 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 |
| Centre Front Horn not working |1.7.3a| | 1 |
| Centre Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear suspension component excessively corroded. swinging arm |2.4.A.1a| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Rear Drive chain fouling another component |6.2.1d| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Headlamp insecure |4.1.1 |c|| | 1 |
| Front Brake grabbing severely (1.2.1 (c)) | 1 |
| Rear Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Offside Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Rear Brake lining(s) less than 1.0 mm thick (1.1.13 (a)) | 1 |
| Nearside Indicator switch insecure |1.5.4| | 1 |
| Brake lever cracked |3.1.2c| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Centre Front Headlamp switch faulty |1.2.4| | 1 |
| Outer Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Front Footrest insecure |6.2.1a| | 1 |
| Headlamp switch insecure |1.2.4| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Steering operation restricted in free movement from lock to lock notchy lock to lock |2.1.4 |c|| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Drive chain excessively tight, so that it is likely to fail |6.1.7 |k| |ii|| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear Exhaust excessively deteriorated |7.1.1a| | 1 |
| Front Wheel damaged or distorted to the extent that control of the motorcycle is likely to be adversely affected |5.2.2 |c| |ii|| | 1 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Rear Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Plate brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.B2b| | 1 |
| Front Hydraulic brake control creeps under load. |3.1.4a| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Rear Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Brake performance not tested |3.3| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Floor brake test Neither brake control achieves an efficiency of 25% |3.3.C1b| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Front Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Horn not working (7.7 (a)) | 1 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Front Brake caliper insecurely mounted and braking performance affected (1.1.16 (c) (ii)) | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |