| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 47 |
| Drive chain excessively loose |6.2.1d| | 25 |
| Drive chain worn to excess |6.2.1e| | 23 |
| Registration plate issues | 19 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 18 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 17 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 16 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Horn not working |1.7.3a| | 10 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 10 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 9 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 9 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 9 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 9 |
| Handlebar deformed |2.1.1b| | 8 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 8 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 8 |
| Rear Footrest missing |6.2.1a| | 8 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 7 |
| Drive chain excessively tight |6.2.1d| | 7 |
| Steering headbearing has excessive free play |2.2.2| | 7 |
| Throttle operating incorrectly |6.2.1f| | 7 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 7 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 7 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Headlamp insecure |1.2.3b| | 6 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 6 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 5 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear Drive chain worn to excess |6.2.1e| | 5 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 5 |
| Nearside Rear Footrest insecure |6.2.1a| | 4 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 4 |
| Rear suspension has corrosion which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 4 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Rear Brake pedal has insufficient reserve travel |1.1.2 |a|| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 3 |
| Nearside Rear Direction indicators not working |1.5.1c| | 3 |
| Offside Rear Footrest missing |6.2.1a| | 3 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 3 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Rear suspension component excessively corroded. |2.4.A.1a| | 3 |
| Offside Rear Direction indicators not working |1.5.1c| | 3 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Drive chain excessively loose |6.2.1d| | 3 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 3 |
| Brake locking device missing |3.2.A1e| | 3 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Offside Front Direction indicator not working |1.5.1c| | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Fuel system component leaking |7.2.1a| | 3 |
| Rear reflector on motorcycle missing |1.4.1| | 3 |
| Headlamp switch faulty |1.2.4| | 2 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Rear Rear suspension has corrosion which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 2 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 2 |
| Rear Rear position lamp insecure |1.1.1c| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Rear Footrest missing (6.2.12 (a)) | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 2 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 2 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 2 |
| Offside Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 2 |
| Plate brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.B2b| | 2 |
| Front Headlamp insecure |1.2.3b| | 2 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Offside Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Rear Brake linkage has abnormal movement due to excessive wear |3.2.A1i| | 2 |
| Rear Brake back plate|s| securing bolt|s| missing |3.2.A1j| | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Motorcycle structure excessively corroded |6.1.1a| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Nearside Front Brake component insecure brake hose clamp loose |1.1.21 |c|| | 1 |
| Headlamp aim not tested |4.1.2 |b|| | 1 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Offside Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Offside Front All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Exhaust mounting missing manifold bolt |7.1.1c| | 1 |
| Drive chain sprocket worn to excess both |6.2.1e| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 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 Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Offside Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Rear Direction indicator obscured |1.5.1a| | 1 |
| Front Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Nearside Rear Drive chain worn to excess |6.2.1e| | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Throttle operating incorrectly revs raise when steering is operated (6.2.7 (a) (i)) | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Nearside Motorcycle structure cracked |6.1.1a| | 1 |
| Nearside Front Upper Direction indicator missing |1.5.1a| | 1 |
| Offside Front Upper Direction indicator missing |1.5.1a| | 1 |
| Nearside Rear Upper Direction indicator missing |1.5.1a| | 1 |
| Offside Rear Upper Direction indicator missing |1.5.1a| | 1 |
| Front Front suspension assembly component excessively bent |2.3.1| | 1 |
| Front Motorcycle structure excessively damaged front mudguard damaged|split| leaving sharp edges |6.1.1a| | 1 |
| Handlebar deformed bent |2.1.1b| | 1 |
| Clutch lever shortened so it cannot be readily operated. ball end missing |6.2.1g| | 1 |
| Wheel alignment incorrect which adversely affects the handling bars/steering out of alignment |2.5.1| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Nearside Motorcycle structure excessively distorted |6.1.1a| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Front suspension assembly component excessively corroded. |2.3.1| | 1 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Front Motorcycle structure excessively distorted |6.1.1a| | 1 |
| Front Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Front Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Rear Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Offside Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Throttle operating incorrectly sticking on |6.2.1f| | 1 |
| Footrest insecure |6.2.1a| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling wheel out of adjusment |2.5.1| | 1 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front wheel spindle loose |2.3.5a| | 1 |
| Front Drive chain worn to excess |6.2.1e| | 1 |
| Fuel cap does not fasten securely by a positive means |7.2.2b| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Front Steering lock stop loose |2.1.3| | 1 |
| Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Front Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Brake pedal cracked |3.1.2c| | 1 |
| Front Position lamp showing red light to the front |4.2.3 |a| |ii|| | 1 |
| Rear Stop lamp showing white light to the rear rear lamp cover missing, part replaced (4.3.3 (a) (ii)) | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Rear Brake back plate|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Front shock absorber seal failed and leaking oil both |2.3.3| | 1 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Rear Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Offside Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Centre Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Brake fluid reservoir insecurely mounted |3.2.B1a| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Centre Front Lower Steering headbearing has excessive free play |2.2.2| | 1 |
| Centre Rear Lower Rear wheel insecure |4.2.3b| | 1 |
| Inner Rear Lower Brake drum|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Rear Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Front Brake disc|s| insecure |3.2.A1g| | 1 |
| Rear Footrest insecure |6.2.1a| | 1 |
| Front Fuel cap sealing washer torn |7.2.2c| | 1 |
| Nearside Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Suspension arm corroded and seriously weakened swing arm - lower face |5.3.3 |b| |i|| | 1 |
| Rear Brake component inadequately mounted Reaction bar split pin missing |1.1.21 |c|| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Front Upper Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Upper Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Offside Front Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Steering control handlebar movement restricted by taut cables accelerator cable be pulled on full lock
causing increased revs |2.1.2c| | 1 |
| Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Position lamp not working dipped beam (4.2.1 (a)) | 1 |
| Front Front position lamp insecure |1.1.1c| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Central Front Upper Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Centre Rear Lower Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Rear Lower Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Brake pedal insecure |3.1.2a| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Steering lock stop ineffective cable fowling |2.1.3| | 1 |
| Front Handlebar deformed |2.1.1b| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Centre Rear Rear suspension has corrosion which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Offside Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Front Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Brake fluid reservoir fluid level significantly below minimum level |1.1.10 |d| |ii|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Centre Front Upper Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Brake performance not tested |3.3| | 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 suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Drive chain so loose it is likely to fail requires replacing with rear carrier sprocket (6.1.7 (c) (ii)) | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Front All position lamps not working |4.2.1 |a|| | 1 |
| Nearside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Nearside Drive chain excessively loose |6.2.1d| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Offside Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Rear Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Rear position lamp flickers when tapped lightly by hand |1.1.3c| | 1 |
| Nearside Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |