| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 20 |
| Rear reflector on motorcycle missing |1.4.1| | 11 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 7 |
| Drive chain excessively loose |6.2.1d| | 6 |
| Drive chain worn to excess |6.2.1e| | 6 |
| Rear reflector missing (4.8.2 (a) (ii)) | 6 |
| Drive chain sprocket worn to excess |6.2.1e| | 5 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Rear Brake excessively binding (1.2.1 (f)) | 5 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Registration plate issues | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Nearside Rear Direction indicator likely to become detached (4.4.1 (c) (ii)) | 2 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Offside Front Direction indicators not working |1.5.1c| | 2 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 2 |
| Front Brake grabbing severely (1.2.1 (c)) | 2 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Registration plate lamp issues | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Riders seat insecure (6.2.5 (a) (ii)) | 2 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 2 |
| Headlamp aim not tested (4.1.2 (b)) | 2 |
| Rear Brake fluid reservoir fluid level significantly below minimum level (1.1.10 (d) (ii)) | 2 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 2 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 2 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Rear Shock absorber has negligible damping effect Shock linkage assembly seized (5.3.2 (b)) | 1 |
| Front Brake fluid reservoir fluid not visible (1.1.10 (d) (iii)) | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Central Rear Upper Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Rear Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Stop lamp remains on when the brake is released front brake |1.3.1e| | 1 |
| Brake pedal is positioned so that the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Shock absorber has negligible damping effect rear linkage bearings feel like there binding (5.3.2 (b)) | 1 |
| Rear suspension has corrosion which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Front Direction indicator insecure |1.5.3b| | 1 |
| Rear mono-shock pivot seized |2.4.B.4| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Suspension attachment bracket/mounting insecure LOOSE BOLTS PLUS 1 FITTED INCORRECTLY (5.3.3 (a) (i)) | 1 |
| Rear Brake effort inadequate at a wheel BRAKE PEDAL FOULING ON FOOTREST (1.2.1 (a) (i)) | 1 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded pedal hitting body due to wear |3.2.A1h| | 1 |
| Steering operation linkage fouling when handlebars turned from lock to lock (2.1.4 (a)) | 1 |
| Fuel cap sealing washer missing |7.2.2c| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected RH switch gear insecure & throttle stop defective |6.2.7 |a| |ii|| | 1 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Nearside Rear Direction indicator not working indicator intermittent |4.4.1 |a| |ii|| | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Headlamp not working on main beam ** Main beam switch activates front position lamp ** |4.1.1 |a| |ii|| | 1 |
| Rear Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 1 |
| Rear Wheel spindle or securing nut|s| so insecure that wheel security or steering control is adversely affected |5.2.1 |c| |ii|| | 1 |
| Drive chain excessively tight, so that it is likely to fail |6.1.7 |k| |ii|| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Nearside Rear Footrest missing |6.2.12 |a|| | 1 |
| Offside Rear Footrest missing |6.2.12 |a|| | 1 |
| Front Brake caliper inadequately mounted sliding bush or rubber missing |excessive movement| |1.1.16 |c| |i|| | 1 |
| Front Brake fluid reservoir fluid not visible |1.1.10 |d| |iii|| | 1 |
| Headlamp aim not tested |4.1.2 |b|| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 1 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Rear Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Nearside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Rear Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Brake pedal pivot excessively worn |1.1.1 |b|| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Drive chain sprocket so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected Assembly loose (6.2.7 (a) (ii)) | 1 |
| Fuel tank insecure (6.1.3 (a) (i)) | 1 |
| Rear Brake caliper inadequately mounted (1.1.16 (c) (i)) | 1 |
| Rear Brake pedal is positioned so that the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Rear Direction indicator incorrect colour (4.4.3 (a)) | 1 |
| Clutch lever shortened so it cannot be readily operated (6.2.7 (b)) | 1 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Rear Suspension component likely to fail (5.3.3 (b) (ii)) | 1 |
| Handlebar deformed to the extent that steering is affected (2.2.1 (c) (ii)) | 1 |
| Forks in such a condition that steering control is adversely affected (2.2.2 (d) (ii)) | 1 |
| Front Brake lever insecure (1.1.2 (e) (i)) | 1 |
| Rear Brake pedal insecure (1.1.2 (e) (i)) | 1 |
| Front Steering linkage locking device missing (2.1.3 (d)) | 1 |
| Front Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Fuel tank insecure |6.1.3 |a| |i|| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Offside Rear Steering linkage locking device ineffective (2.1.3 (d)) | 1 |
| Throttle operating incorrectly not returning (6.2.7 (a) (i)) | 1 |
| Offside Brake lever is so short that the brake cannot be readily applied broken (1.1.2 (d)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 1 |
| Rear reflector on motorcycle obscured by L plate |1.4.2b| | 1 |
| Fuel cap leaking fuel cap seal leaking (6.1.3 (b) (i)) | 1 |
| Central Rear Direction indicator obviously incorrectly positioned rear indicators to close together. less than 180mm seperation (4.4.3 (a)) | 1 |
| Front Motorcycle structure corroded to the extent that the rigidity of the assembly is significantly reduced front forks (6.1.1 (c) (i)) | 1 |
| Rear Brake fluid contaminated |1.8 |a|| | 1 |
| Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies brake lever |1.3.1a| | 1 |
| Rear Brake fluid reservoir insecurely mounted |3.2.B1a| | 1 |
| Front Dipswitch does not operate immediately when selected on dipped beam |4.1.3 |b|| | 1 |
| Front Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Central Front Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Front position lamp missing |1.1.1a| | 1 |
| Rear Drive chain sprocket excessively loose (6.1.7 (c) (i)) | 1 |
| Rear Chain guard fouling another component |6.2.1c| | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Front Shock absorber has a serious fluid leak fork seal (5.3.2 (b)) | 1 |
| Offside Front Shock absorber has a serious fluid leak fork seal (5.3.2 (b)) | 1 |
| Rear Brake cylinder insecure Brake cylinder push rod, not connected. Only held in place by rubber dust seal. Brake performance intermittently affected (1.1.16 (c) (i)) | 1 |
| Offside Rear Indicator tell tale not functioning |1.5.2| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Centre Rear Stop lamp does not emit a steady light not working off front brake |1.3.1b| | 1 |
| Centre Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Stop lamp not working front stop light switch (4.3.1 (a) (ii)) | 1 |
| Nearside Rear Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Brake lagging in operation (1.2.1 (d)) | 1 |
| Roller brake test No brake control achieves an efficiency of 30% (1.2.2 (a) (i)) | 1 |
| Central Front Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Nearside Drive chain worn to excess Sprockets also Worn |6.2.1e| | 1 |
| Throttle operating incorrectly because switch gear is excessively loose |6.2.1f| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Brake hose leaking fluid at front caliper union |3.2.B4| | 1 |
| Brake component is fractured rear brake lever master cylinder and linkage |3.1.5| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front shock absorber seal failed and leaking oil both seals |2.3.3| | 1 |
| Nearside Rear Direction indicator missing |1.5.1a| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies brake switch |1.3.1a| | 1 |
| Drive chain excessively loose and rusty |6.2.1d| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Brake performance not tested |3.3| | 1 |
| Offside Headlamp switch insecure throttle unit insecure |1.2.4| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Wheel has an excessively distorted bead rim. front wheel buckled |4.2.2| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Exhaust mounting does not fully support the exhaust system exhaust silencer insecure |7.1.1.c| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Suspension arm pin or bush excessively worn rear mono shock link |5.3.4 |a| |i|| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Rear Rear wheel bearings are excessively tight |2.4.A.2c| | 1 |
| Rear Brake pedal insecure split pin missing (1.1.2 (e) (i)) | 1 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Rear Brake cylinder leaking and braking performance affected (1.1.16 (b) (ii)) | 1 |
| Front Brake cylinder insecure bolt missing (1.1.16 (c) (i)) | 1 |
| Brake performance not tested rear brake fluid reservoir not connected lack of fluid (1.2.1 (g)) | 1 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Offside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected engine revving excessively on full right lock (6.2.7 (a) (ii)) | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Upper Engine mounting/bracket bracket missing top engine mounting bolt missing (6.1.8 (a) (ii)) | 1 |
| Front Wheel fixing missing (multiple fixings) spindle clamp bolts missing (5.2.1 (a) (i)) | 1 |
| Nearside Lower Fork yoke insecure left lower yoke fork clamp bolt missing (2.2.2 (d) (i)) | 1 |
| Rear Suspension component pin or bush excessively worn bottom shock bush (5.3.4 (a) (i)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected engine speed increases when turning right (6.2.7 (a) (ii)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected throttle twist grip switch gear loose |6.2.7 |a| |ii|| | 1 |
| Rear Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Centre Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Steering headbearing excessively stiff or notchy excessively stiff and notchy (2.2.2 (f) (i)) | 1 |
| Rear Drive chain sprocket so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Exhaust mounting missing Bolt Missing form tailpipe |7.1.1c| | 1 |
| Drive chain excessively tight |6.1.7 |k| |i|| | 1 |
| Nearside Rear Footrest insecure |6.2.12 |a|| | 1 |
| Fork yoke insecure |2.2.2 |d| |i|| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Brake caliper inadequately mounted and braking performance affected Fixing thread striped (1.1.16 (c) (ii)) | 1 |
| Rear Suspension component mounting has an unsafe modification Stiff operation (5.3.3 (c) (i)) | 1 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 1 |
| Rear reflector defective or damaged by more than 50% of the reflecting surface Obscured (4.8.1 (a) (ii)) | 1 |
| Front Brake lever has restricted free movement Switch gear inter fearing with leaver (1.1.15 (e)) | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Rear position lamp incorrect colour Number plate light showing white light to rear. |1.1.2b| | 1 |
| Offside Front Footrest insecure (6.2.12 (a)) | 1 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Stop lamp does not illuminate immediately a brake applies Front Control |1.3.1a| | 1 |
| Exhaust silencer insecure BOLT MISSING (8.1.1 (b) (i)) | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Front Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 1 |
| Brake hose leaking rear resevoir (1.1.12 (c)) | 1 |
| Front Headlamp insecure (4.1.1 (c)) | 1 |
| Stop lamp remains on when the brakes are released | 1 |