| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 35 |
| Rear reflector on motorcycle missing |1.4.1| | 22 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Registration plate issues | 11 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 11 |
| Drive chain excessively tight |6.2.1d| | 11 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 9 |
| Drive chain excessively loose |6.2.1d| | 9 |
| Throttle operating incorrectly |6.2.1f| | 8 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 7 |
| Front wheel bearings are excessively rough |2.3.5b| | 7 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 6 |
| Front wheel bearings have excessive free play |2.3.5b| | 6 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 6 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| Riders seat insecure |6.2.1a| | 5 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 4 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 4 |
| 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| | 4 |
| Offside Rear Footrest insecure |6.2.1a| | 3 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 3 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 3 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 3 |
| Nearside Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Nearside Front Footrest insecure |6.2.1a| | 2 |
| Offside Front Direction indicators not working |1.5.1c| | 2 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 2 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Offside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 2 |
| Offside Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Front Plate brake test indicates a binding brake |3.3.B1a| | 2 |
| Front Brake excessively binding |1.2.1 |f|| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Nearside Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Nearside Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Offside Front Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Inner Front Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Offside Front Brake fluid reservoir severely corroded |3.2.B1b| | 1 |
| Nearside Rear Brake pipe union leaking fluid |3.2.B4| | 1 |
| Nearside Rear Brake pipe likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Outer Front Brake component damaged and seriously reduced in strength |3.2.A1| | 1 |
| Nearside Rear Brake component damaged and seriously reduced in strength |3.2.A1| | 1 |
| Offside Rear Brake pedal is inoperative |3.1.3c| | 1 |
| Outer Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Rear Brake performance not tested |3.3| | 1 |
| Outer Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Seat insecure |6.2.1a| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Stop lamp does not illuminate immediately a brake applies from rear brake |1.3.1a| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Rear Brake pedal insecure |3.1.2a| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Steering lock stop ineffective |2.1.3| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Offside Front Brake disc|s| excessively pitted |3.2.A1l| | 1 |
| Offside Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Offside Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Rear Brake pedal cracked |3.1.2c| | 1 |
| Offside Front Brake component cracked and seriously reduced in strength |3.2.A1| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Centre Rear Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Offside Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Nearside Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Centre Steering lock stop ineffective |2.1.3| | 1 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Rear Brake disc|s| cracked |3.2.A1g| | 1 |
| Nearside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Offside Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Nearside Handlebar deformed |2.1.1b| | 1 |
| Steering lock stop ineffective |2.1.3| | 1 |
| Nearside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Nearside Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Offside Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Rear Brake effort inadequate at a wheel |1.2.1 |a| |i|| | 1 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear Brake disc fractured |1.1.14 |a| |ii|| | 1 |
| Rear Brake disc significantly and obviously worn |1.1.14 |a| |i|| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride rear sprocket nut not locked in place |6.2.1h| | 1 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Nearside Front Steering operation impeded by a fairing Fairing bolts missing! |2.1.4 |e|| | 1 |
| Offside Front Steering operation impeded by a fairing Bolts missing! |2.1.4 |e|| | 1 |
| Nearside Front Steering operation linkage fouling when handlebars turned from lock to lock Clutch lever hitting speedo! |2.1.4 |a|| | 1 |
| Riders seat insecure |6.2.5 |a| |ii|| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Offside Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Offside Handlebar deformed |2.1.1b| | 1 |
| Nearside Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Offside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies LEVER |1.3.1a| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort 5 bars |3.3.A1d| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Offside Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Offside Front Brake disc fractured |1.1.14 |a| |ii|| | 1 |
| Nearside Front Brake disc fractured |1.1.14 |a| |ii|| | 1 |
| Rear Footrest missing |6.2.12 |a|| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Clutch lever bent so it cannot be readily operated. |6.2.1g| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Rear Seat insecure |6.2.1a| | 1 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Nearside Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Nearside Front suspension assembly component loose |2.3.1| | 1 |
| Brake pedal insecure |3.1.2a| | 1 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 1 |
| Rear Brake cylinder severely damaged |3.2.B1b| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Nearside Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Centre Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Offside Rear All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Rear Brake hose connection leaking caliper (1.1.12 (c)) | 1 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Offside Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Central Rear Position lamp not working (4.2.1 (a)) | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |