| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 21 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 19 |
| Registration plate issues | 12 |
| Drive chain excessively loose |6.2.1d| | 11 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 11 |
| Registration plate lamp issues | 8 |
| Drive chain worn to excess |6.2.1e| | 8 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 7 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Horn not working |1.7.3a| | 7 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 7 |
| Headlamp insecure |1.2.3b| | 7 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 5 |
| Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Riders seat insecure |6.2.1a| | 4 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Stop lamp remains on when the brakes are released | 3 |
| Headlamp aim not tested |1.6| | 3 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 3 |
| Offside Front Footrest insecure |6.2.1a| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Chain guard insecure |6.2.1c| | 2 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 2 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Riders seat insecure |6.2.5 |a| |ii|| | 2 |
| Nearside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Riders seat insecure (6.2.5 (a) (ii)) | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Front Wheel excessively distorted (5.2.2 (c) (i)) | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 2 |
| Front Brake caliper insecure |1.1.16 |c| |i|| | 1 |
| Rear Brake caliper has no reserve travel and braking performance affected |1.1.16 |e| |ii|| | 1 |
| Nearside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride carrier bracket |6.2.1h| | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Rear Brake lining|s| less than 1.0 mm thick |1.1.13 |a|| | 1 |
| Rear Brake pedal not releasing correctly and functionality of brakes affected |1.1.2 |b| |ii|| | 1 |
| Rear Brake pedal pivot excessively tight |1.1.1 |a|| | 1 |
| Front Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Nearside Front Shock absorber has a serious fluid leak fork (5.3.2 (b)) | 1 |
| Headlamp aim not tested headlight insecure (4.1.2 (b)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Brake disc contaminated fork oil (1.1.14 (b)) | 1 |
| Nearside Direction indicator incorrect colour lens missing (4.4.3 (a)) | 1 |
| Nearside Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Rear Brake pivot excessively corroded brake drum pivot seized (1.1.15 (b)) | 1 |
| Rear Brake lever has insufficient reserve travel hits on exhaust (1.1.2 (a)) | 1 |
| Offside Front Shock absorber has a serious fluid leak fork (5.3.2 (b)) | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Brake pivot excessively corroded rear brake pivot at stand corroded and seized (1.1.15 (b)) | 1 |
| Offside Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Brake pedal not releasing correctly and functionality of brakes affected assy stripped and cleaned (1.1.2 (b) (ii)) | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Stop lamp obscured |1.3.1c| | 1 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Nearside Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Stop lamp does not illuminate immediately a brake applies changed bulb |1.3.1a| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Rear reflector on motorcycle insecure |1.4.2c| | 1 |
| Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Rear Direction indicator incorrect colour (4.4.3 (a)) | 1 |
| Fuel cap missing |7.2.2a| | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Leg shield insecure and likely to impede the steering |2.1.2e| | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Engine mounting/bracket damaged or deteriorated resulting in excessive movement (6.1.8 (a) (i)) | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Footrest missing (6.2.12 (a)) | 1 |
| Front Wheel spoke excessively loose (5.2.2 (d)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Rear Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Front Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Drive chain sprocket excessively loose |6.1.7 |c| |i|| | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Rear Footrest missing |6.2.12 |a|| | 1 |
| Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Front mudguard can easily contact any fixed point of the motor bicycle. |2.3.7| | 1 |
| Front Brake disc|s| securing bolt|s| loose |3.2.A1g| | 1 |
| Front Brake grabbing severely |1.2.1 |c|| | 1 |
| Front suspension assembly component excessively bent |2.3.1| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies replaced bulb |1.3.1a| | 1 |
| Front Footrest insecure |6.2.1a| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Rear Footrest missing (6.2.12 (a)) | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Offside Rear Lower Brake locking device missing |3.2.A1e| | 1 |
| Nearside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front Wheel modified significantly reducing the original strength |4.2.1a| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Rear Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Fuel hose leaking |7.2.1a| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Wheel damaged significantly reducing the original strength |4.2.1a| | 1 |
| Direction indicator insecure |1.5.3b| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Stop lamp not working lamp not working when front brake applied (4.3.1 (a) (ii)) | 1 |
| Offside Front Front shock absorber seal failed and leaking oil (2.3.3) | 1 |
| Stop lamp not working not working from control 1 (front brake lever) (4.3.1 (a) (ii)) | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Rear Brake rod has restricted free movement fitted incorrectly (1.1.15 (e)) | 1 |
| Rear Brake rod insecure rear torque arm bolt not fitted correctly |no split pin| |1.1.15 |c|| | 1 |
| Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Brake reaction bracket insecure |3.2.A1j| | 1 |
| Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Stop lamp does not illuminate immediately a brake applies front brake |1.3.1a| | 1 |
| Central Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Rear Stop lamp not working Footbrake (4.3.1 (a) (ii)) | 1 |
| Footrest insecure bent (6.2.12 (a)) | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Brake locking device insecure |3.2.A1e| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |