| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 29 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 20 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 19 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 18 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 17 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 10 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 10 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 9 |
| Rear Position lamp not working (4.2.1 (a)) | 8 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 8 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 8 |
| Stop lamp remains on when the brakes are released | 7 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 7 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 7 |
| Rear Brake excessively binding (1.2.1 (f)) | 7 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 6 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 6 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 5 |
| Front Brake excessively binding (1.2.1 (f)) | 5 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 5 |
| Horn not working (7.7 (a) (ii)) | 5 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Front Position lamp not working (4.2.1 (a)) | 4 |
| Brake hose excessively deteriorated | 4 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 4 |
| Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Front Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 3 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 3 |
| Rear Drive chain sprocket excessively loose (6.1.7 (c) (i)) | 3 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 3 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 3 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 3 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 3 |
| Fuel cap leaking (6.1.3 (b) (i)) | 3 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 3 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 3 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 3 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 3 |
| Nearside Rear Direction indicator likely to become detached (4.4.1 (c) (ii)) | 3 |
| Headlamp insecure (4.1.1 (c)) | 2 |
| Front Brake caliper inadequately mounted and braking performance affected lower bush missing (1.1.16 (c) (ii)) | 2 |
| Horn sound not in accordance with requirements (7.7 (c)) | 2 |
| Front Brake hose damaged and likely to fail (1.1.12 (a)) | 2 |
| Rear Brake linkage has restricted free movement (1.1.15 (e)) | 2 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 2 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 2 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 2 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Rear Brake lever not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 2 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Rear Brake fluid not visible (1.1.10 (d) (iii)) | 2 |
| Footrest insecure |6.2.12 |a|| | 2 |
| Rear Brake has no recorded effort at a wheel (1.2.1 (a) (ii)) | 2 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 2 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 2 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 2 |
| Offside Rear Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 2 |
| Horn not working (7.7 (a)) | 2 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 2 |
| Front Brake lever is bent and the brake cannot be readily applied (1.1.2 (d)) | 2 |
| All direction indicators not working (4.4.1 (a) (ii)) | 2 |
| Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 2 |
| Front Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 2 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 2 |
| Front Brake hose excessively damaged Cut to cords (1.1.12 (b) (ii)) | 1 |
| Offside Rear Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Footrest missing R & L passenger (6.2.12 (a)) | 1 |
| Direction indicator likely to become detached L/H/R (4.4.1 (c) (ii)) | 1 |
| Registration plate issues | 1 |
| Throttle operating incorrectly Top outer cable bend & nut loose (6.2.7 (a) (i)) | 1 |
| Handlebar grip insecure to handlebar L/H (2.2.1 (d) (ii)) | 1 |
| Handlebar fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Handlebar excessively deformed (2.2.1 (c) (i)) | 1 |
| Registration plate lamp issues | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Offside Front Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Front Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Front Handlebar fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Front Headlamp light source and lamp not compatible (4.1.4 (c)) | 1 |
| Front Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |
| Front Brake caliper inadequately mounted and braking performance affected (1.1.16 (c) (ii)) | 1 |
| Rear Brake disc fractured (1.1.14 (a) (ii)) | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Front Brake performance not tested Unable to test because of excessive movement in wheel bearings (1.2.1 (g)) | 1 |
| Front Wheel alignment incorrect which adversely affects the steering Front wheel points towards O/S (2.4 (a)) | 1 |
| Brake effort inadequate at a wheel Front |1.2.1 |a| |i|| | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Rear Suspension attachment bracket/mounting insecure chain adjustment nut (5.3.3 (a) (i)) | 1 |
| Front Brake lever has insufficient reserve travel foot (1.1.2 (a)) | 1 |
| Rear Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Rear Stop lamp not working Application of rear brake does not illuminate brake light (4.3.1 (a) (ii)) | 1 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Brake pedal so insecure that the brake cannot be readily applied (1.1.2 (e) (ii)) | 1 |
| Front Brake pedal pivot has excessive free play (1.1.1 (b)) | 1 |
| Central Front Horn not working (7.7 (a) (ii)) | 1 |
| Rear Drive chain sprocket excessively loose Bolt missing from sprocket (6.1.7 (c) (i)) | 1 |
| Fuel cap leaking Corrosion around the cap mating face (6.1.3 (b) (i)) | 1 |
| Stop lamp not working WHEN REAR BRAKE APPLIED |4.3.1 |a| |ii|| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Wheel hub worn to the extent that wheel security is adversely affected CUSH DRIVE WORN, EXCESSIVE PLAY |5.2.1 |b| |ii|| | 1 |
| Front Headlamp insecure (4.1.1 (c)) | 1 |
| Fuel cap ineffective (6.1.3 (b) (i)) | 1 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Central Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Central Rear Position lamp not working (4.2.1 (a)) | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Fuel tank leaking excessively or a risk of fire (6.1.3 (b) (ii)) | 1 |
| Rear Brake pedal not releasing correctly and functionality of brakes affected not returning (1.1.2 (b) (ii)) | 1 |
| Central Rear Suspension component mounting has an unsafe modification swing arm securing bolt shortened so not into locking device (5.3.3 (c) (i)) | 1 |
| Rear Brake grabbing severely (1.2.1 (c)) | 1 |
| Rear Position lamp adversely affected by the operation of another lamp (4.2.3 (b)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Offside Rear Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Offside Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Brake hose excessively twisted (1.1.12 (b) (ii)) | 1 |
| Front Brake grabbing severely |1.2.1 |c|| | 1 |
| Rear Brake lever pivot has excessive free play (1.1.1 (b)) | 1 |
| Exhaust system insecure (6.1.2 (a)) | 1 |
| Offside Front Handlebar restricted in free movement from lock to lock (2.1.4 (c)) | 1 |
| Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Drive chain horseshoe locking device incorrectly fitted incorrect rotation. |6.1.7 |j| |i|| | 1 |
| Wheel spindle loose |5.2.1 |c| |i|| | 1 |
| Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Brake hose excessively stretched fouling rear shocker spring |1.1.12 |b| |ii|| | 1 |
| Rear Motorcycle structure joining/attachment plate or fastening so insecure that structural rigidity is seriously reduced load carrier |6.1.1 |b| |ii|| | 1 |
| Rear Footrest missing (6.2.12 (a)) | 1 |
| Drive chain sprocket so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Nearside Front Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Offside Front Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Front Footrest insecure n/s and and o/s peg insecure (6.2.12 (a)) | 1 |
| Central Front Upper Steering headbearing has excessive wear or free play major play in head stock (2.2.2 (f) (i)) | 1 |
| Wheel spindle loose (5.2.1 (c) (i)) | 1 |
| Headlamp incorrect colour |4.1.4 |a|| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Steering headbearing in such a condition that steering control is adversely affected Excessive play "knocking" (2.2.2 (f) (ii)) | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Front Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Suspension arm ball joint excessively worn (5.3.4 (a) (i)) | 1 |
| Dipswitch does not operate immediately when selected on dipped beam |4.1.3 |b|| | 1 |
| Dipswitch does not operate immediately when selected on main beam |4.1.3 |b|| | 1 |
| Front All position lamps not working |4.2.1 |a|| | 1 |
| Rear All position lamps not working |4.2.1 |a|| | 1 |
| Rear Brake lever has abnormal movement of levers indicating excessive wear or maladjustment (1.1.15 (f)) | 1 |
| Rear Stop lamp not working rear pedal (4.3.1 (a) (ii)) | 1 |
| Rear Brake caliper insecure (1.1.16 (c) (i)) | 1 |
| Fuel system component leaking excessively or a risk of fire (6.1.3 (b) (ii)) | 1 |
| Rear Motorcycle structure joining/attachment plate or fastening insecure rear engine mount bolt missing (6.1.1 (b) (i)) | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Steering headbearing excessively stiff or notchy notchy (2.2.2 (f) (i)) | 1 |
| Front Motorcycle structure joining/attachment plate or fastening insecure engine mount bolts missing (6.1.1 (b) (i)) | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.4 |a|| | 1 |
| Brake pedal insecure retaining bolt absent (1.1.2 (e) (i)) | 1 |
| Front Steering headbearing in such a condition that steering control is adversely affected (2.2.2 (f) (ii)) | 1 |
| Front Dipswitch does not operate immediately when selected on dipped beam |4.1.3 |b|| | 1 |
| Rear Suspension arm attachment bracket/mounting insecure rear swingarm excessive play
nut loose (5.3.3 (a) (i)) | 1 |
| Drive chain sprocket so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Nearside Rear All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Rear Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 1 |
| Chain guard insecure (6.1.7 (i)) | 1 |
| Offside Front Direction indicator with a multiple light source more than 1/2 not functioning (4.4.1 (a) (ii)) | 1 |
| Offside Front Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Nearside Rear Direction indicator with a multiple light source more than 1/2 not functioning (4.4.1 (a) (ii)) | 1 |
| Rear Suspension arm attachment bracket/mounting insecure (5.3.3 (a) (i)) | 1 |
| Rear Brake hose bulging under pressure (1.1.12 (d)) | 1 |
| Steering linkage locking device ineffective (2.1.3 (d)) | 1 |
| Suspension arm attachment bracket/mounting insecure rear swing arm bolt loose (5.3.3 (a) (i)) | 1 |
| Central Front Headlamp insecure (4.1.1 (c)) | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Nearside Rear Footrest insecure |6.2.12 |a|| | 1 |
| Rear Brake master cylinder insecure (1.1.10 (c)) | 1 |
| Offside Brake linkage has restricted free movement REAR BRAKE PEDAL STICKING ON AT PIVOT (1.1.15 (e)) | 1 |
| Front Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Footrest missing (6.2.12 (a)) | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Rear Brake linkage excessively worn (1.1.15 (b)) | 1 |
| Motorcycle structure is so deformed it is likely to adversely affect braking or steering mainstand insecure (6.1.1 (a) (ii)) | 1 |
| Front Valve stem seriously damaged perished (5.2.3 (j)) | 1 |
| Motorcycle structure has a fracture which is likely to adversely affect braking or steering Mounting point for rear brake master cylinde fractured (6.1.1 (a) (ii)) | 1 |
| Rear Brake linkage excessively worn Brake pedal to rear master cylinder likage broken (1.1.15 (b)) | 1 |
| Rear Brake master cylinder insecure Rear master cylinder mounting pont fractured away from frame (1.1.10 (c)) | 1 |
| Nearside Rear Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Drive chain sprocket so loose it is likely to fail sprocket bearing. (6.1.7 (c) (ii)) | 1 |
| Front All direction indicators adversely affected by the operation of another lamp (4.4.3 (b)) | 1 |
| Rear Wheel fixing loose (multiple fixings) (5.2.1 (a) (i)) | 1 |
| Rear brake disc in such a condition that it is seriously weakened | 1 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Drive chain excessively loose |6.2.1d| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Front Footrest insecure (6.2.12 (a)) | 1 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 1 |
| Offside Rear Motorcycle structure joining/attachment plate or fastening insecure (6.1.1 (b) (i)) | 1 |
| Nearside Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Pillion seat with a defective supporting structure no grab rail (6.2.6 (a) (i)) | 1 |
| Nearside Front Suspension arm pin or bush excessively worn Swing arm bush worn (5.3.4 (a) (i)) | 1 |
| Drive chain sprocket excessively loose Carrier casting broken, bolts loose . (6.1.7 (c) (i)) | 1 |
| Forks excessively deformed (2.2.2 (d) (i)) | 1 |
| Rear Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Brake fluid contaminated (1.8 (a)) | 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 |
| Rear Suspension component pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Offside Front Brake excessively binding (1.2.1 (f)) | 1 |
| Offside Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Nearside Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Central Rear Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Front Brake master cylinder leaking (1.1.10 (b) (ii)) | 1 |
| Suspension component pin or bush excessively worn Swingarm bushes (5.3.4 (a) (i)) | 1 |
| Offside Footrest insecure (6.2.12 (a)) | 1 |
| Nearside Rear Wheel bearing has excessive play sprocket carrier bearing (5.1.3 (a) (i)) | 1 |
| Rear Wheel hub excessively worn (5.2.1 (b) (i)) | 1 |
| Headlamp light intensity severely reduced (4.1.4 (a)) | 1 |
| Offside Front Direction indicator missing (4.4.1 (a) (ii)) | 1 |
| Clutch lever bent so it cannot be readily operated (6.2.7 (b)) | 1 |
| Handlebar deformed to the extent that steering is affected (2.2.1 (c) (ii)) | 1 |
| Rear Brake caliper damaged missing (1.1.16 (a) (i)) | 1 |
| Drive chain sprocket excessively loose cush drive rubbers worn (6.1.7 (c) (i)) | 1 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Drive chain horseshoe locking device likely to become detached horseshoe clip loose (6.1.7 (j) (ii)) | 1 |
| Rear Drive chain sprocket so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected |6.2.7 |a| |ii|| | 1 |
| Rear Brake pedal not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 1 |
| Rear Brake component insecure (1.1.21 (c)) | 1 |
| Front Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Rear Brake lagging in operation requires pedal adjusting (1.2.1 (d)) | 1 |
| Offside Position lamp switch does not operate in accordance with the requirements switch gear (4.2.2 (a)) | 1 |