| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 36 |
| Rear reflector missing (4.8.2 (a) (ii)) | 23 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 15 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 10 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 10 |
| Horn not working (7.7 (a)) | 7 |
| Front Brake disc contaminated (1.1.14 (b)) | 7 |
| Registration plate issues | 5 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 5 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 5 |
| Horn not working (7.7 (a) (ii)) | 5 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 5 |
| Rear Brake excessively binding (1.2.1 (f)) | 5 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 5 |
| Stop lamp remains on when the brakes are released | 4 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 4 |
| Front Position lamp not working (4.2.1 (a)) | 4 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 4 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 4 |
| Registration plate lamp issues | 4 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 3 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 3 |
| Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 3 |
| Rear reflector missing |4.8.2 |a| |ii|| | 3 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 3 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 3 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 3 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 3 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 2 |
| Rear Stop lamp emits other than a steady red light (4.3.3 (a) (ii)) | 2 |
| Rear Motorcycle structure joining/attachment plate or fastening insecure (6.1.1 (b) (i)) | 2 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 2 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition (8.1.1 (a)) | 2 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 2 |
| Rear Brake grabbing severely (1.2.1 (c)) | 2 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 2 |
| Rear Drive chain worn to excess (6.1.7 (c) (i)) | 2 |
| Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 2 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 2 |
| Rear Brake has no recorded effort at a wheel |1.2.1 |a| |ii|| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 2 |
| Rear Footrest missing (6.2.12 (a)) | 1 |
| Headlamp light source and lamp not compatible led bulb fitted (4.1.4 (c)) | 1 |
| Nearside Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Brake hose leaking (1.1.12 (c)) | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Wheel fixing loose (single fixing) (5.2.1 (a) (ii)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Nearside Rear Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Wheel fixing loose (single fixing) (5.2.1 (a) (ii)) | 1 |
| Rear Brake rod insecure (1.1.15 (c)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Brake performance not tested (1.2.1 (g)) | 1 |
| Rear Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Offside Front Handlebar excessively deformed (2.2.1 (c) (i)) | 1 |
| Central Front Position lamp not working New Bulb Fitted PRS (4.2.1 (a)) | 1 |
| Nearside Rear Drive chain excessively loose Drive Chain Adjusted And Lubricated PRS (6.1.7 (c) (i)) | 1 |
| Nearside Rear Lower Drive chain excessively loose Chain Worn And Hanging (6.1.7 (c) (i)) | 1 |
| Central Rear Suspension arm ball joint excessively worn Rear Swing Arm Bushes Worn (5.3.4 (a) (i)) | 1 |
| Exhaust system insecure loose at manifold (6.1.2 (a)) | 1 |
| Exhaust silencer likely to become detached mounted to suspension component (swing arm and lower shock mount) restricting suspension movement significantly and putting stress on manifold bolts (8.1.1 (b) (ii)) | 1 |
| Brake pedal not releasing correctly and functionality of brakes affected rear brake sticking on (1.1.2 (b) (ii)) | 1 |
| Drive chain excessively tight also may be worn to tight to tell (6.1.7 (k) (i)) | 1 |
| Rear Wheel spindle loose (5.2.1 (c) (i)) | 1 |
| Rear Rear reflector missing FITTED REFLECTOR DURING TEST (4.8.2 (a) (ii)) | 1 |
| Front Stop lamp not working Not working from front brake lever (4.3.1 (a) (ii)) | 1 |
| Brake pedal not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 1 |
| Front Forks modification unsafe both no play in front forks stiff (2.2.2 (e)) | 1 |
| Position lamp not working (4.2.1 (a)) | 1 |
| Headlamp reflector missing (4.1.1 (b) (ii)) | 1 |
| Offside Front Shock absorber has a serious fluid leak Nearside fork has been replaced (5.3.2 (b)) | 1 |
| Clutch lever positioned so it cannot be readily operated No pivot bolt fitted at time of test (6.2.7 (b)) | 1 |
| Motorcycle structure joining/attachment plate or fastening insecure Security device missing from rear brake reaction arm (6.1.1 (b) (i)) | 1 |
| Lower Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 1 |
| Rear Wheel fixing loose |multiple fixings| |5.2.1 |a| |i|| | 1 |
| Engine mounting/bracket bracket excessively loose (6.1.8 (a) (ii)) | 1 |
| Rear Brake caliper operating mechanism has excessive travel |1.1.16 |e| |i|| | 1 |
| Offside Suspension arm attachment bracket/mounting insecure swinging arm nut loose (5.3.3 (a) (i)) | 1 |
| Rear Suspension component pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Stop lamp adversely affected by the operation of another lamp |4.3.3 |b|| | 1 |
| Offside Footrest insecure (6.2.12 (a)) | 1 |
| Rear Brake lever pivot excessively tight (1.1.1 (a)) | 1 |
| Brake clevis joint excessively worn at pedal (1.1.15 (b)) | 1 |
| Front Brake disc contaminated |1.1.14 |b|| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Rear Footrest missing |6.2.12 |a|| | 1 |
| Nearside Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Offside Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| All position lamps not working |4.2.1 |a|| | 1 |
| Drive chain excessively loose Very loose/worn (6.1.7 (c) (i)) | 1 |
| Offside Front Throttle operating incorrectly Sticking on full lock (6.2.7 (a) (i)) | 1 |
| Front Brake fluid contaminated (1.8 (a)) | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Front Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Headlamp light source and lamp not compatible |4.1.4 |c|| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Rear Brake pedal has insufficient reserve travel |1.1.2 |a|| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Nearside Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Offside Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls front control switch clearly faulty (4.3.2 (a) (iii)) | 1 |
| Front Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Headlamp aim unable to be tested (4.1.2 (b)) | 1 |
| Rear Stop lamp not working application (4.3.1 (a) (ii)) | 1 |
| Brake pedal pivot excessively tight (1.1.1 (a)) | 1 |
| Front Shock absorber has a serious fluid leak forks (5.3.2 (b)) | 1 |
| Exhaust system insecure (6.1.2 (a)) | 1 |
| Nearside Front Brake excessively binding (1.2.1 (f)) | 1 |
| Handlebar retaining device missing R/H Rear handlebar clamp bolt broken (2.2.1 (b) (i)) | 1 |
| Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Front brake disc in such a condition that it is seriously weakened | 1 |
| Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Rear Footrest missing os and ns (6.2.12 (a)) | 1 |
| Rear Suspension component pin or bush excessively worn swinging arm |5.3.4 |a| |i|| | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Rear Brake linkage has restricted free movement (1.1.15 (e)) | 1 |
| Rear Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 1 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Front Steering operation restricted in free movement from lock to lock |2.1.4 |c|| | 1 |
| Rear Brake lining(s) less than 1.0 mm thick (1.1.13 (a)) | 1 |
| Rear Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Horn not working |1.7.3a| | 1 |
| Steering lock stop ineffective |2.1.3| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Nearside Steering lock stop missing |2.1.3| | 1 |
| Offside Steering lock stop missing |2.1.3| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Handlebar excessively deformed (2.2.1 (c) (i)) | 1 |
| Offside Rear Footrest missing (6.2.12 (a)) | 1 |
| Steering operation linkage fouling when handlebars turned from lock to lock (2.1.4 (a)) | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Footrest missing pillion (6.2.12 (a)) | 1 |
| Front Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 1 |
| Rear Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 1 |
| Rear Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition (8.1.1 (a)) | 1 |
| Nearside Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Offside Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear Brake rod has restricted free movement |1.1.15 |e|| | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Fuel hose leaking excessively or a risk of fire (6.1.3 (b) (ii)) | 1 |
| Fuel system component leaking (6.1.3 (b) (i)) | 1 |
| Front Headlamp insecure (4.1.1 (c)) | 1 |
| All direction indicators not working Not flashing and barely glowing. |4.4.1 |a| |ii|| | 1 |
| Rear Motorcycle structure joining/attachment plate or fastening so insecure that structural rigidity is seriously reduced |6.1.1 |b| |ii|| | 1 |
| Front Brake lever pivot excessively tight (1.1.1 (a)) | 1 |
| Exhaust silencer insecure (8.1.1 (b) (i)) | 1 |
| Front Brake grabbing severely (1.2.1 (c)) | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Suspension arm mounting has an unsafe modification (5.3.3 (c) (i)) | 1 |
| Throttle operating incorrectly engine revs on right lock |6.2.7 |a| |i|| | 1 |
| Front Upper Steering headbearing in such a condition that steering control is adversely affected |2.2.2 |f| |ii|| | 1 |
| Front Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Drive chain horseshoe locking device incorrectly fitted fixing clip wrong way round. (6.1.7 (j) (i)) | 1 |
| Offside Rear Lower Shock absorber insecurely attached (5.3.2 (a) (i)) | 1 |
| Offside Rear Brake pedal not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 1 |
| Offside Front Shock absorber has a serious fluid leak fork seal leaking (5.3.2 (b)) | 1 |
| Rear Wheel spindle locking device missing (5.2.1 (d)) | 1 |
| Rear Drive chain horseshoe locking device likely to become detached Incorectly fitted. (6.1.7 (j) (ii)) | 1 |
| Rear Brake pedal so insecure that the brake cannot be readily applied Damaged. Bent. Says on. (1.1.2 (e) (ii)) | 1 |
| Rear Suspension arm attachment bracket/mounting insecure Swing arm (5.3.3 (a) (i)) | 1 |
| Front Position lamp missing (4.2.1 (a)) | 1 |
| Offside Rear Footrest missing Stuck. siezed up. (6.2.12 (a)) | 1 |
| Rear Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 1 |
| Front Wheel bearing play so excessive that directional control is impaired (5.1.3 (a) (ii)) | 1 |
| Rear Brake excessively binding lever not returning correctly (1.2.1 (f)) | 1 |
| Front 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 |
| Handlebar so insecure it is likely to become detached |2.2.1 |b| |ii|| | 1 |
| Motorcycle structure joining/attachment plate or fastening insecure front mudguard only mounted on one side also used to brace front forks (6.1.1 (b) (i)) | 1 |
| Rear Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Handlebar fouling on the fuel tank or bodywork on full lock steering stop missing. (2.1.4 (b)) | 1 |
| Rear Brake pedal is positioned so that the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |