| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 23 |
| Drive chain excessively loose |6.2.1d| | 11 |
| Registration plate issues | 10 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Drive chain worn to excess |6.2.1e| | 7 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 7 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 6 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Rear reflector on motorcycle missing |1.4.1| | 5 |
| Rear suspension component excessively corroded. |2.4.A.1a| | 5 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Nearside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 4 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 4 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Rear suspension has corrosion which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Brake locking device missing |3.2.A1e| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Drive chain fouling another component |6.2.1d| | 3 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Front suspension has inadequate damping effect. |2.3.6c| | 3 |
| Riders seat insecure |6.2.1a| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Nearside Handlebar deformed |2.1.1b| | 2 |
| Offside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 2 |
| Nearside Front Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Offside Handlebar deformed |2.1.1b| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Horn not working |1.7.3a| | 2 |
| Front wheel spindle securing nut locking device insecure fitted wrong causing disc to make contact with caliper |2.3.3a| | 1 |
| Offside Rear Footrest insecure s/pin missing |6.2.1a| | 1 |
| Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Drive chain fouling another component centre stand |6.2.1d| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Shock absorber has a serious fluid leak both rear (5.3.2 (b)) | 1 |
| Front Brake disc contaminated both sides (1.1.14 (b)) | 1 |
| Clutch lever bent so it cannot be readily operated. |6.2.1g| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Brake drum|s| securing bolt|s| loose |3.2.A1g| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Brake master cylinder leaking reservoir cap leaking (1.1.10 (b) (ii)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Offside Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Offside Front Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Rear suspension component excessively corroded. |2.4.A.1a| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Footrest missing both |6.2.12 |a|| | 1 |
| Rear suspension has a fracture of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Headlamp incorrect colour |1.2.1| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Stop lamp not working off of foot pedal (4.3.1 (a) (ii)) | 1 |
| Rear Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Front Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Rear Rear wheel has a missing wheel nut|s| |4.2.3a| | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Offside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear reflector on motorcycle does not reflect squarely to the rear |1.4.1| | 1 |
| Brake rod excessively chafed |3.2.A1a| | 1 |
| Nearside Handlebar handgrip missing |2.1.1c| | 1 |
| Offside Handlebar handgrip missing |2.1.1c| | 1 |
| Rear Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Nearside Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Offside Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Headlamp damaged and function impaired |1.2.3a| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Front Fuel system component leaking |7.2.1a| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Offside Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Chain guard insecure |6.1.7 |i|| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Chain guard fouling another component |6.2.1c| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Nearside Drive chain worn to excess |6.2.1e| | 1 |
| Nearside Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Brake component leaking fluid |3.2.B4| | 1 |
| Front Brake locking device insecure |3.2.A1e| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Brake component insecure TORQUE ARM LOCKING DEVICE |1.1.21 |c|| | 1 |
| Handlebar so insecure it is likely to become detached |2.2.1 |b| |ii|| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Offside Rear Brake locking device missing |3.2.A1e| | 1 |
| Front Upper Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Nearside Front Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Offside Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Brake pedal has insufficient reserve travel brake cam arm included angle greater than 90 degrees (1.1.2 (a)) | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Brake locking device insecure |3.2.A1e| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Offside Front Throttle operating incorrectly Throttle Jams on lock to Offside. (6.2.7 (a) (i)) | 1 |
| Rear Suspension component pin or bush excessively worn Swinging arm Bushes or needs adjustment. (5.3.4 (a) (i)) | 1 |
| Front Steering headbearing has excessive wear or free play Needs Adjustment. (2.2.2 (f) (i)) | 1 |
| Nearside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Front Lower Front suspension assembly component cracked |2.3.1| | 1 |
| Rear Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Nearside Rear Direction indicator obscured |1.5.1a| | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Rear Motorcycle structure corroded to the extent that the rigidity of the assembly is significantly reduced frame (6.1.1 (c) (i)) | 1 |
| Exhaust noise is clearly in excess of that emitted by a similar motor bicycle fitted with a standard silencer in average condition |7.1.2| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Offside Rear Lower Rear suspension has corrosion which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front Headlamp aim beam image too far to the left |1.6.4| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Rear Rear suspension component excessively corroded. |2.4.A.1a| | 1 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Steering lock stop ineffective |2.1.3| | 1 |
| Brake excessively binding FRONT (1.2.1 (f)) | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Steering lock stop ineffective |2.1.3| | 1 |
| Nearside Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Rear Lower Brake locking device missing |3.2.A1e| | 1 |
| Offside Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Nearside Lower Front suspension assembly component loose |2.3.1| | 1 |
| Centre Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |