| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 50 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 17 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 14 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 14 |
| Drive chain worn to excess |6.2.1e| | 13 |
| Drive chain excessively loose |6.2.1d| | 12 |
| Registration plate issues | 10 |
| Headlamp aim beam image kick up to the offside |1.6| | 8 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 5 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 5 |
| Handlebar deformed |2.1.1b| | 5 |
| Horn not working |1.7.3a| | 5 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 4 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Rear Drive chain excessively loose |6.2.1d| | 4 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 4 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Nearside Front Footrest insecure |6.2.1a| | 3 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 2 |
| Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Offside Rear Direction indicator insecure |1.5.3b| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Nearside Direction indicators not working |1.5.1c| | 2 |
| Nearside Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Centre Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 2 |
| Rear Motorcycle structure excessively corroded |6.1.1a| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| Rear suspension has corrosion which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Brake locking device missing |3.2.A1e| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Headlamp aim not tested |1.6| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Front Brake component has an inadequate repair |3.1.5| | 1 |
| Stop lamp does not illuminate immediately a brake applies rear brake |1.3.1a| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Rear Brake reaction bracket excessively worn (1.1.15 (b)) | 1 |
| Drive chain sprocket worn to excess both |6.2.1e| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Front Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Rear Stop lamp not working wire off brake switchs (4.3.1 (a) (ii)) | 1 |
| Rear Brake clevis joint excessively worn (1.1.15 (b)) | 1 |
| Rear Brake linkage excessively worn (1.1.15 (b)) | 1 |
| Rear Brake rod excessively worn (1.1.15 (b)) | 1 |
| Rear Brake lever excessively worn (1.1.15 (b)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Front Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Direction indicator affected by the operation of another lamp Indicators only work with light switch in the on position. |1.5.1c| | 1 |
| Rear wheel spindle securing nut locking device missing Wrong spindle nut fitted/no split pin hole in spindle. |2.4.A.2b| | 1 |
| Fuel system component leaking (6.1.3 (b) (i)) | 1 |
| Front Brake back plate|s| insecure |3.2.A1j| | 1 |
| Nearside Front Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Nearside Chain guard insecure |6.2.1c| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Nearside Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Central Front Upper Headlamp at least one does not illuminate on dipped beam bulb |1.2.2a|i|| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Offside Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Nearside Front Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Centre Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 1 |
| Rear Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Rear Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Front Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Offside Front Footrest insecure (6.2.12 (a)) | 1 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Nearside Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Rear wheel bearings have excessive free play both |2.4.A.2c| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Horn not working (7.7 (a)) | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Position lamp not working |4.2.1 |a|| | 1 |
| Rear Brake pedal not releasing correctly and functionality of brakes affected |1.1.2 |b| |ii|| | 1 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Central Front Steering headbearing has excessive wear or free play Freeplay in steering adjusted PRS on test (2.2.2 (f) (i)) | 1 |
| Nearside Front Direction indicator not working wasnt flashing (4.4.1 (a) (ii)) | 1 |
| Nearside Rear Direction indicator not working wasnt flashing (4.4.1 (a) (ii)) | 1 |
| Offside Front Shock absorber has a serious fluid leak Fork Seal (5.3.2 (b)) | 1 |
| Front Headlamp insecure loose headlight (4.1.1 (c)) | 1 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Rear Brake pedal pivot has excessive free play (1.1.1 (b)) | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Rear Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Wheel more than one fixing missing Rear axle locking device missing. (5.2.1 (a) (ii)) | 1 |
| Rear Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Nearside Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Nearside Rear Drive chain worn to excess |6.2.1e| | 1 |
| Front Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Nearside Rear Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Handlebar deformed |2.1.1b| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Front Brake master cylinder severely damaged |3.2.B1b| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Headlamp light intensity severely reduced (4.1.4 (a)) | 1 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Front Stop lamp not working handle bar switch |4.3.1 |a| |ii|| | 1 |
| Front Suspension arm pin or bush excessively worn |5.3.4 |a| |i|| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Nearside Footrest missing |6.2.1a| | 1 |
| Dipswitch does not operate immediately when selected on main beam (4.1.3 (b)) | 1 |
| Rear Position lamp adversely affected by the operation of another lamp (4.2.3 (b)) | 1 |
| Stop lamp adversely affected by the operation of another lamp (4.3.3 (b)) | 1 |
| Rear Footrest missing (6.2.12 (a)) | 1 |
| Front Brake lagging in operation No brake effort until fully applied (1.2.1 (d)) | 1 |
| Front Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Front Engine mounting/bracket missing front engine bolt and nut missing |6.1.8 |a| |ii|| | 1 |
| Front Position lamp adversely affected by the operation of another lamp (4.2.3 (b)) | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |
| Front Suspension component mounting has an unsafe modification lights added to forks reducing amount of travel (5.3.3 (c) (i)) | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Decelerometer brake test indicates a sticking brake |3.3.E1d| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Rear Wheel more than one fixing missing (5.2.1 (a) (ii)) | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride footpeg splitpin |6.2.1h| | 1 |
| Offside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride footpeg splitpin |6.2.1h| | 1 |
| Nearside Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Position lamp switch insecure (4.2.2 (b)) | 1 |
| Rear All position lamps not working (4.2.1 (a)) | 1 |
| Fuel tank insecure (6.1.3 (a) (i)) | 1 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies front lever |1.3.1a| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Nearside Rear Upper Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Suspension component pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 1 |
| Rear Rear position lamp adversely affected by the operation of the horn |1.1.3b| | 1 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking Rear fender insecure and fouling rear wheel. |6.1.1c| | 1 |
| Centre Front Fuel system component insecure FUEL TANK LOOSE |7.2.1b| | 1 |
| Nearside Rear Shock absorber insecurely attached (5.3.2 (a) (i)) | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Centre Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Offside Rear Brake pedal insecure |3.1.2a| | 1 |
| Rear Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Rear Brake hose leaking fluid resevoir |3.2.B4| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Steering headbearing in such a condition that steering control is adversely affected |2.2.2 |f| |ii|| | 1 |
| Rear Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Offside Brake reaction bracket insecure |3.2.A1j| | 1 |
| Offside Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Nearside Footrest insecure (6.2.12 (a)) | 1 |
| Headlamp lens seriously defective upside down |4.1.1 |b| |ii|| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Central Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Nearside Front Handlebar excessively deformed |2.2.1 |c| |i|| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Front All position lamps not working (4.2.1 (a)) | 1 |
| Brake hose excessively deteriorated | 1 |
| Front Wheel bearing play so excessive that directional control is impaired (5.1.3 (a) (ii)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Rear Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Offside Front Lower Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Front Forks excessively corroded fork leaking as a result (2.2.2 (d) (i)) | 1 |
| Front Stop lamp switch with a delay in operation replaced switch, not working. (4.3.2 (a) (ii)) | 1 |