| Most common failures | No# failures |
|---|
| Registration plate issues | 46 |
| Rear reflector on motorcycle missing |1.4.1| | 38 |
| Headlamp aim out of alignment | 30 |
| Registration plate lamp issues | 14 |
| Horn not working |1.7.3a| | 11 |
| Rear reflector missing (4.8.2 (a) (ii)) | 11 |
| Drive chain excessively loose |6.2.1d| | 9 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 8 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Drive chain worn to excess |6.2.1e| | 5 |
| Horn not working (7.7 (a) (ii)) | 5 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 4 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Nearside Front Direction indicator not working |1.5.1c| | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 3 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Offside Front Footrest insecure |6.2.1a| | 2 |
| Nearside Front Footrest insecure |6.2.1a| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 2 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 2 |
| Offside Front Brake disc contaminated (1.1.14 (b)) | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Horn not working (7.7 (a)) | 2 |
| Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 2 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Front Stop lamp not working |front brake lever control| |4.3.1 |a| |ii|| | 1 |
| Front Wheel spindle or securing nut|s| so insecure that wheel security or steering control is adversely affected spindle pinch bolt missing |5.2.1 |c| |ii|| | 1 |
| Rear Direction indicator adversely affected by the operation of another lamp |4.4.3 |b|| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Front Brake pipe excessively chafed |3.2.B2a| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Rear position lamp adversely affected by the operation of another lamp brake light and idicator in one unit |1.1.3b| | 1 |
| Front Brake lever has inadequate reserve travel lever touches handle bar |3.1.3b| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Upper Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Outer Direction indicators not working none working |1.5.1c| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Nearside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Nearside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Motorcycle structure corroded to the extent that the rigidity of the assembly is significantly reduced Headstock corroded from inside out. hole in right hand side |6.1.1 |c| |i|| | 1 |
| Nearside Front Lower Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Front Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Centre Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear Roller brake test indicates a binding brake rear brake does not release |3.3.A1a| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Nearside Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Nearside Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Offside Rear Lower Drive chain excessively tight, so that it is likely to fail |6.1.7 |k| |ii|| | 1 |
| Offside Rear Lower Drive chain sprocket so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Nearside Footrest insecure |6.2.12 |a|| | 1 |
| Offside Footrest insecure |6.2.12 |a|| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Offside Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear position lamp missing |1.1.1a| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |
| Upper Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Headlamp switch faulty |1.2.4| | 1 |
| Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Centre Rear Lower Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Nearside Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Offside Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Front Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Front Horn not working |7.7 |a| |ii|| | 1 |
| Front Headlamp aim not tested |1.6| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies fit a new switch |1.3.1a| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies fit a new switch |1.3.1a| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies faulty brake switch |1.3.1a| | 1 |
| Front Horn not working faulty switch |1.7.3a| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 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 Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Offside Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Headlamp aim not tested possibility headlampaim may aim to right |4.1.2 |b|| | 1 |
| Front Position lamp not working dip beam inop |4.2.1 |a|| | 1 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Front Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Rear Brake caliper inadequately mounted (1.1.16 (c) (i)) | 1 |
| Rear Brake hose bulging under pressure (1.1.12 (d)) | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Rear Brake fluid reservoir fluid level significantly below minimum level (1.1.10 (d) (ii)) | 1 |
| Nearside Front Direction indicator not working (1.5.1c) | 1 |
| Rear Brake component is excessively corroded (3.1.5) | 1 |
| Headlamp at least one does not illuminate on dipped beam (1.2.2a(i)) | 1 |
| Nearside Front Footrest insecure (6.2.1a) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Nearside Front Direction indicator with a multiple light source more than 1/2 not functioning (4.4.1 (a) (ii)) | 1 |
| Nearside Front Lower Footrest insecure (6.2.12 (a)) | 1 |
| Offside Front Lower Footrest insecure (6.2.12 (a)) | 1 |
| Central Front Lower Horn not working (7.7 (a) (ii)) | 1 |
| Nearside Front Lower Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Offside Front Lower Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Offside Rear All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Offside Front Motorcycle structure corroded to the extent that the rigidity of the assembly is significantly reduced frame strengthener on steering head holed (6.1.1 (c) (i)) | 1 |
| Offside Rear Direction indicator with a multiple light source more than 1/2 not functioning (4.4.1 (a) (ii)) | 1 |
| Drive chain horseshoe locking device likely to become detached missing (6.1.7 (j) (ii)) | 1 |
| Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 1 |
| Central Front Horn not working (7.7 (a) (ii)) | 1 |
| Central Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 1 |
| Front Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Offside Front Direction indicator missing (4.4.1 (a) (ii)) | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Rear Brake fluid contaminated (1.8 (a)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Exhaust system insecure (6.1.2 (a)) | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Front Brake lever has abnormal movement of levers indicating excessive wear or maladjustment (1.1.15 (f)) | 1 |
| Front Brake has no recorded effort at a wheel (1.2.1 (a) (ii)) | 1 |
| Brake hose damaged | 1 |
| Headlamp aim projected beam image obviously incorrect dipped (4.1.2 (c)) | 1 |
| Headlamp aim projected beam image obviously incorrect main (4.1.2 (c)) | 1 |
| Nearside Rear Wheel spindle locking device missing (5.2.1 (d)) | 1 |
| Throttle operating incorrectly Throttle cable ferrule snapped (6.2.7 (a) (i)) | 1 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Headlamp aim unable to be tested (4.1.2 (b)) | 1 |
| Nearside Front Direction indicator light intensity significantly reduced (4.4.3 (a)) | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Stop lamp not working front brake switch goes off with increased effort . (4.3.1 (a) (ii)) | 1 |
| Offside Front Direction indicator incorrect colour (4.4.3 (a)) | 1 |
| Rear Position lamp adversely affected by the operation of another lamp (4.2.3 (b)) | 1 |
| Rear Stop lamp adversely affected by the operation of another lamp (4.3.3 (b)) | 1 |
| Wheel spindle loose (5.2.1 (c) (i)) | 1 |
| Central Front Lower Brake indicates excessive fluctuation of brake effort excessive fluctuation on front roller test (suspected discs warped) (1.2.1 (e)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Rear Footrest missing (6.2.12 (a)) | 1 |
| Rear Brake has no recorded effort at a wheel (1.2.1 (a) (ii)) | 1 |