| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 19 |
| Drive chain excessively loose |6.2.1d| | 9 |
| Rear reflector missing (4.8.2 (a) (ii)) | 7 |
| Registration plate issues | 5 |
| Rear reflector on motorcycle missing |1.4.1| | 5 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 3 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Stop lamp remains on when the brakes are released | 3 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 3 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 3 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 2 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Horn not working (7.7 (a)) | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 2 |
| Front Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 2 |
| Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 2 |
| Central Rear Lower Suspension arm ball joint excessively worn (5.3.4 (a) (i)) | 1 |
| Central Front Upper Horn not working (7.7 (a) (ii)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Steering lock stop ineffective |2.1.3| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front suspension assembly component excessively bent f/legs |2.3.1| | 1 |
| Front suspension assembly component excessively bent fork legs |2.3.1| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Offside Rear Footrest missing (6.2.12 (a)) | 1 |
| Rear suspension bearing has excessive free play swinging arm |2.4.A2a|i|| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear wheel spindle loose |2.4.A.2b| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 1 |
| Rear Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Front Brake lever not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 1 |
| Throttle operating incorrectly Throttle twist grip clamp not secured to handlebar. |6.2.1f| | 1 |
| Rear Brake component modification unsafe brake back plate fouling brake drum (1.1.21 (d) (i)) | 1 |
| Rear Wheel spindle loose (5.2.1 (c) (i)) | 1 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Brake pedal is bent and the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Drive chain sprocket so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Suspension arm attachment bracket/mounting insecure (5.3.3 (a) (i)) | 1 |
| Horn not working |1.7.3a| | 1 |
| Rear Suspension component mounting has an unsafe modification (5.3.3 (c) (i)) | 1 |
| Front Position lamp adversely affected by the operation of another lamp (4.2.3 (b)) | 1 |
| Rear Shock absorber has a serious fluid leak Both sides |5.3.2 |b|| | 1 |
| Rear Stop lamp not working pedal |4.3.1 |a| |ii|| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Offside Front Direction indicator missing |1.5.1a| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear suspension component loose Swinging arm had play tighten |2.4.A.1a| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Rear suspension fouling which affects the movement of the rear suspension fouling on silencer |2.4.A.3a| | 1 |
| Brake reaction bracket insecure SPLIT PIN MISSING |3.2.A1j| | 1 |
| Front position lamp missing |1.1.1a| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Stop lamp does not illuminate immediately a brake applies handle bar lever |1.3.1a| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Front suspension has inadequate damping effect. fork seals leaking |2.3.6c| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Rear Brake grabbing severely |1.2.1 |c|| | 1 |
| Offside Rear Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Stop lamp does not illuminate by the operation of both brake controls Rear switch spring broken (4.3.2 (a) (iii)) | 1 |
| Rear Suspension arm pin or bush excessively worn Both swing arm bushes (5.3.4 (a) (i)) | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Indicator tell tale not functioning |1.5.2| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Nearside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Rear Drive chain sprocket so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Drive chain sprocket so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Front Drive chain sprocket so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Brake lining(s) less than 1.0 mm thick (1.1.13 (a)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Brake pedal not releasing correctly and functionality of brakes affected |1.1.2 |b| |ii|| | 1 |
| Rear Brake has no recorded effort at a wheel |1.2.1 |a| |ii|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Offside Headlamp switch insecure SWITCH GEAR INSECURE |1.2.4| | 1 |
| Rear Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Rear reflector on motorcycle obscured by L plate |1.4.2b| | 1 |
| Front Upper Brake hose leaking (1.1.12 (c)) | 1 |
| Front Lower Brake hose leaking (1.1.12 (c)) | 1 |
| Front Wheel spindle loose (5.2.1 (c) (i)) | 1 |
| Rear Brake pedal not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Nearside Rear Rear suspension bearing has excessive free play swing arm bearing |2.4.A2a|i|| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Rear Rear suspension bush has excessive free play swing arm bush worn |2.4.A2a|i|| | 1 |
| Headlamp reflector missing (4.1.1 (b) (ii)) | 1 |
| Rear Brake lever pivot excessively tight |1.1.1 |a|| | 1 |
| Drive chain sprocket worn to excess both |6.2.1e| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Stop lamp does not illuminate immediately a brake applies FRONT BRAKE |1.3.1a| | 1 |
| Rear suspension component loose TRAILING ARM BUSHES WORN |2.4.A.1a| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Rear Stop lamp not working foot |4.3.1 |a| |ii|| | 1 |
| Rear Stop lamp not working hand |4.3.1 |a| |ii|| | 1 |
| All position lamps not working |4.2.1 |a|| | 1 |
| Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Front Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Front Headlamp insecure |4.1.1 |c|| | 1 |
| Rear All direction indicators missing |4.4.1 |a| |ii|| | 1 |
| Rear All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Front All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Footrest missing |6.2.12 |a|| | 1 |
| Rear Brake component insecure no locking pin |1.1.21 |c|| | 1 |
| Exhaust has a major leak of exhaust gases hold and blowing |6.1.2 |a|| | 1 |
| Front Handlebar deformed |2.1.1b| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Rear Rear reflector on motorcycle obscured |1.4.2b| | 1 |
| Nearside Rear Drive chain fouling another component main stand rubbing chain |6.2.1d| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |