| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 56 |
| Rear reflector missing (4.8.2 (a) (ii)) | 23 |
| Registration plate lamp issues | 14 |
| Horn not working (7.7 (a)) | 10 |
| Rear Brake excessively binding (1.2.1 (f)) | 9 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 9 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 8 |
| Front Brake excessively binding (1.2.1 (f)) | 6 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 6 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 6 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 5 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 5 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 5 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Registration plate issues | 4 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 4 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 4 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 4 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 3 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 3 |
| Front Wheel spindle locking device missing (5.2.1 (d)) | 3 |
| Stop lamp remains on when the brakes are released | 3 |
| Rear Wheel spoke excessively loose (5.2.2 (d)) | 3 |
| Front Horn not working (7.7 (a)) | 2 |
| Brake excessively binding (1.2.1 (f)) | 2 |
| Central Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 2 |
| Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 2 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 2 |
| Nearside Front Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Offside Rear Footrest missing (6.2.12 (a)) | 2 |
| Handlebar fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 2 |
| Front Headlamp aim unable to be tested No dip (4.1.2 (b)) | 2 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 2 |
| Handlebar deformed to the extent that steering is affected (2.2.1 (c) (ii)) | 2 |
| Front Wheel spoke excessively loose (5.2.2 (d)) | 2 |
| Brake excessively binding rear system (1.2.1 (f)) | 1 |
| Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 1 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Rear Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Nearside Front Direction indicator not working left front indicator inop (4.4.1 (a) (ii)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Rear Lower Suspension arm attachment bracket/mounting insecure lower link loose (5.3.3 (a) (i)) | 1 |
| Rear Exhaust system insecure Silencer loose (6.1.2 (a)) | 1 |
| Handlebar mounting insecure (2.2.1 (a) (i)) | 1 |
| Rear reflector likely to become detached (4.8.1 (b) (ii)) | 1 |
| Central Rear Lower Brake excessively binding (1.2.1 (f)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls Front brake switch not connected (4.3.2 (a) (iii)) | 1 |
| Handlebar restricted in free movement from lock to lock (2.1.4 (c)) | 1 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Drive chain horseshoe locking device likely to become detached (6.1.7 (j) (ii)) | 1 |
| Front All direction indicators missing (4.4.1 (a) (ii)) | 1 |
| Rear All direction indicators missing (4.4.1 (a) (ii)) | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Rear Stop lamp missing (4.3.1 (a) (ii)) | 1 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Rear Brake has no recorded effort at a wheel (1.2.1 (a) (ii)) | 1 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Brake lining(s) incorrectly mounted corroded (1.1.13 (c)) | 1 |
| Offside Front Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 1 |
| Offside Front Engine mounting/bracket missing lock nut missing (6.1.8 (a) (ii)) | 1 |
| Stop lamp not working On front brake (4.3.1 (a) (ii)) | 1 |
| Front Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 1 |
| Headlamp insecure headlamp shell cracked. (4.1.1 (c)) | 1 |
| Rear Brake pedal pivot has excessive free play (1.1.1 (b)) | 1 |
| Rear Brake performance unable to be tested (1.2.1 (g)) | 1 |
| Central Front Upper Steering headbearing excessively stiff or notchy Headbearings notchy. (2.2.2 (f) (i)) | 1 |
| Nearside Rear Lower Drive chain worn to excess Chain worn and corroded. (6.1.7 (c) (i)) | 1 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 1 |
| Rear Wheel spindle loose (5.2.1 (c) (i)) | 1 |
| Front Brake lever insecure (1.1.2 (e) (i)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Fuel tank insecure (6.1.3 (a) (i)) | 1 |
| Stop lamp not working front lever (4.3.1 (a) (ii)) | 1 |
| Front Brake lever has insufficient reserve travel front brake was full of air and needed bleeding,it is now perfect (1.1.2 (a)) | 1 |
| All position lamps not working (4.2.1 (a)) | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Nearside Rear Direction indicator lens defective such that the emitted light is adversely affected (4.4.1 (b) (ii)) | 1 |
| Headlamp aim projected beam image obviously incorrect Wrong style of headlamp is fitted. (4.1.2 (c)) | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Front Wheel fixing missing (single fixing) off side spindle clamp (5.2.1 (a) (ii)) | 1 |
| Fuel cap ineffective (6.1.3 (b) (i)) | 1 |
| Rear reflector reflecting white to the rear (4.8.2 (a) (ii)) | 1 |
| Rear Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Steering operation linkage fouling when handlebars turned from lock to lock (2.1.4 (a)) | 1 |
| Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Rear Wheel fixing missing (single fixing) (5.2.1 (a) (ii)) | 1 |
| Handlebar retaining device loose (2.2.1 (b) (i)) | 1 |
| Front Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Rear Exhaust system insecure (6.1.2 (a)) | 1 |
| Brake cylinder has no reserve travel and braking performance affected (1.1.16 (e) (ii)) | 1 |
| Brake cylinder leaking and braking performance affected (1.1.16 (b) (ii)) | 1 |
| Brake cylinder operating mechanism has excessive travel (1.1.16 (e) (i)) | 1 |
| Stop lamp not working NOT WORKING OF FRONT OR REAR LEVERS (4.3.1 (a) (ii)) | 1 |
| Central Front Inner Horn not working (7.7 (a)) | 1 |
| Rear Shock absorber insecurely attached (5.3.2 (a) (i)) | 1 |
| Rear Shock absorber has negligible damping effect linkage is seized resulting in no suspension movement. (5.3.2 (b)) | 1 |
| Steering operation linkage fouling when handlebars turned from lock to lock Throttle cables re-routed. All OK. (2.1.4 (a)) | 1 |
| Front Brake hose damaged and likely to fail (1.1.12 (a)) | 1 |
| Central Front Lower Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Rear Brake pedal is bent and the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Steering operation fouling on the fuel tank or bodywork on full lock handguards fouling screen (2.1.4 (b)) | 1 |
| Nearside Rear Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Wheel alignment incorrect which adversely affects the handling Front wheel and forks severely misaligned with frame, frame possibly twisted (2.4 (a)) | 1 |
| Wheel alignment incorrect which adversely affects the steering Front wheel and forks severely misaligned with frame, frame possibly twisted (2.4 (a)) | 1 |
| Brake pedal not releasing correctly and functionality of brakes affected Rear brake pedal fouls exhaust heat shield locking rear brake on. (1.1.2 (b) (ii)) | 1 |
| Front Steering headbearing excessively stiff or notchy Very Notchy (2.2.2 (f) (i)) | 1 |
| Rear Wheel spoke excessively loose X3 (5.2.2 (d)) | 1 |
| Brake pedal not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 1 |
| Central Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Brake clevis joint insecure split pin missing. (1.1.15 (c)) | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Stop lamp not working Front brake light not working when applying front brake (4.3.1 (a) (ii)) | 1 |