| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 28 |
| Registration plate lamp issues | 15 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 9 |
| Drive chain excessively loose |6.2.1d| | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 5 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 3 |
| Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 3 |
| Riders seat insecure (6.2.5 (a) (ii)) | 3 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Registration plate issues | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Offside Front Position lamp not working (4.2.1 (a)) | 2 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Front Front mudguard insecure |2.3.7| | 2 |
| Rear Brake lining|s| less than 1.0 mm thick |1.1.13 |a|| | 2 |
| Front Brake grabbing severely (1.2.1 (c)) | 2 |
| Chain guard insecure |6.2.1c| | 2 |
| Nearside Front Direction indicator not working |4.4.1 |a| |ii|| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 2 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Front position lamp missing |1.1.1a| | 2 |
| Front Brake lever insecure (1.1.2 (e) (i)) | 1 |
| Direction indicators flashing less than 60 times a minute Not flashing |1.5.1c| | 1 |
| 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 |
| Exhaust system insecure exhaust bolt missing (6.1.2 (a)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Rear Footrest missing BOTH (6.2.12 (a)) | 1 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.4 |a|| | 1 |
| Brake clevis joint has restricted free movement (1.1.15 (e)) | 1 |
| Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected On left lock (6.2.7 (a) (ii)) | 1 |
| Drive chain sprocket so loose it is likely to fail sprocket carrier bearing has broken up (6.1.7 (c) (ii)) | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Rear wheel spindle loose |2.4.A.2b| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear Brake rod insecure locking device missing (1.1.15 (c)) | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Direction indicator adversely affected by the operation of another lamp |4.4.3 |b|| | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Chain guard insecure |6.1.7 |i|| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Front Brake cable insecure (1.1.15 (c)) | 1 |
| Riders seat insecure |6.2.5 |a| |ii|| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Rear Suspension rod mounting has an unsafe modification (5.3.3 (c) (i)) | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Offside Front Position lamp not working |4.2.1 |a|| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Front Footrest insecure |6.2.1a| | 1 |
| Nearside Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Drive chain sprocket carrier worn to excess cush drive rubbers worn |6.2.1e| | 1 |
| Handlebar deformed handlebars bent |2.1.1b| | 1 |
| Drive chain sprocket worn to excess teeth missing (6.1.7 (c) (i)) | 1 |
| Rear Drive chain sprocket excessively loose (6.1.7 (c) (i)) | 1 |
| Nearside Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |
| Rear Brake lagging in operation (1.2.1 (d)) | 1 |
| Rear Chain guard insecure |6.1.7 |i|| | 1 |
| Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Front Chain guard insecure |6.1.7 |i|| | 1 |
| Steering operation linkage fouling when handlebars turned from lock to lock |2.1.4 |a|| | 1 |
| Motorcycle structure corroded to the extent that the rigidity of the assembly is significantly reduced swingarm corroded and rusted through (6.1.1 (c) (i)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Rear Brake reaction bracket excessively corroded fixing on swingarm extremely corroded (1.1.15 (b)) | 1 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected |6.2.7 |a| |ii|| | 1 |
| Offside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Rear Wheel hub excessively worn |5.2.1 |b| |i|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Nearside Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Shock absorber has a serious fluid leak Left side (5.3.2 (b)) | 1 |
| Front All direction indicators not working rear |4.4.1 |a| |ii|| | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Front Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Rear Footrest missing both |6.2.1a| | 1 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| All direction indicators light intensity significantly reduced |4.4.3 |a|| | 1 |
| Nearside Rear Drive chain sprocket so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Nearside Front Footrest insecure (6.2.12 (a)) | 1 |
| Brake disc|s| insecure |3.2.A1g| | 1 |
| Front Front position lamp damaged and function impaired |1.1.1b| | 1 |
| Rear Rear position lamp insecure |1.1.1c| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Offside Brake pedal insecure |3.1.2a| | 1 |
| Stop lamp does not illuminate immediately a brake applies CHANGED BULB |1.3.1a| | 1 |
| Footrest missing R & L - rear passenger (6.2.12 (a)) | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Brake component insecure Rear brake torque arm nut split pin missing (1.1.21 (c)) | 1 |
| Wheel fixing loose (multiple fixings) (5.2.1 (a) (i)) | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Offside Footrest missing |6.2.1a| | 1 |
| Brake caliper|s| insecure |3.2.A1j| | 1 |
| Rear Brake drum insecure (1.1.14 (a) (ii)) | 1 |
| Front Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Stop lamp does not illuminate immediately a brake applies front switch |1.3.1a| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Horn not working |1.7.3a| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Rear Stop lamp likely to become detached (4.3.1 (c) (ii)) | 1 |
| Nearside Front Motorcycle structure is fractured and structural rigidity is significantly reduced (6.1.1 (a) (i)) | 1 |
| Offside Front Motorcycle structure is fractured and structural rigidity is significantly reduced (6.1.1 (a) (i)) | 1 |
| Rear Brake component insecure rear brake arm mounting bolt (1.1.21 (c)) | 1 |
| Brake component insecure no secrurity split pin on front brake arm mounting bolt (1.1.21 (c)) | 1 |
| Exhaust system insecure rear mounting bolt loose (6.1.2 (a)) | 1 |
| Rear Motorcycle structure corroded to the extent that the rigidity of the assembly is significantly reduced rear swingarm dangerously corroded (6.1.1 (c) (i)) | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Nearside Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Nearside Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Offside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride at brake drum , split pin missing |6.2.1h| | 1 |
| Rear Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Stop lamp not working Brake control 1 |RH| |4.3.1 |a| |ii|| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Front Brake disc contaminated |1.1.14 |b|| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Brake performance not tested brake pivot seized in backplate causing heavily binding brake |3.3| | 1 |
| Rear Brake linkage has abnormal movement due to maladjustment brake arm loose on spline |3.2.A1i| | 1 |
| Rear wheel insecure spindle not in 100 % and nut only half way on |4.2.3b| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Offside Rear Footrest insecure mount bolt missing |6.2.1a| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |