| Most common failures | No# failures |
|---|
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 38 |
| Headlamp aim out of alignment | 33 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 20 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 19 |
| Front wheel bearings have excessive free play |2.3.5b| | 17 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 15 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 15 |
| Stop lamp remains on when the brake is released |1.3.1e| | 12 |
| Steering headbearing has excessive free play |2.2.2| | 12 |
| Front wheel bearings are excessively rough |2.3.5b| | 11 |
| Drive chain excessively loose |6.2.1d| | 9 |
| Registration plate issues | 8 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 8 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 7 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 7 |
| Headlamp aim beam image kick up to the offside |1.6| | 5 |
| Horn not working |1.7.3a| | 5 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 5 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Registration plate lamp issues | 4 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Stop lamp remains on when the brakes are released | 3 |
| Rear reflector on motorcycle missing |1.4.1| | 3 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 2 |
| Offside Front Direction indicator insecure |1.5.3b| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Brake lever cannot be released smoothly |3.1.3d| | 2 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Nearside Front Direction indicator insecure |1.5.3b| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Horn control defective |1.7.2a| | 2 |
| Rear brake disc in such a condition that it is seriously weakened | 1 |
| Rear Brake hose excessively damaged (1.1.12 (b) (ii)) | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Offside Exhaust silencer insecure (8.1.1 (b) (i)) | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Stop lamp not working on front brake lever (4.3.1 (a) (ii)) | 1 |
| Offside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Nearside Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Offside Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Front Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Rear Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear Rear wheel spindle loose |2.4.A.2b| | 1 |
| Fuel cap leaking |6.1.3 |b| |i|| | 1 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Rear Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 1 |
| Front Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 1 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Front Steering control handlebar movement restricted by cables caught on a projection |2.1.2c| | 1 |
| Fuel tank insecure (6.1.3 (a) (i)) | 1 |
| Exhaust markings indicating not for road use or similar wording (6.1.2 (c)) | 1 |
| Rear Brake pedal has insufficient reserve travel |1.1.2 |a|| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Centre Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Brake disc|s| cracked |3.2.A1g| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Rear Brake excessively binding Master cylinder sticking |1.2.1 |f|| | 1 |
| Rear Stop lamp switch with a delay in operation Brake light sticking on. |4.3.2 |a| |ii|| | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Fuel tank leaking |7.2.1a| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Riders seat missing |6.2.1a| | 1 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Offside Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort no effort on brake |3.3.A1d| | 1 |
| Fairings so located that it is likely to impede the steering |2.1.2e| | 1 |
| Nearside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Fuel hose leaking |7.2.1a| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Stop lamp switch with a delay in operation operated from handlebar |4.3.2 |a| |ii|| | 1 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Front Throttle operating incorrectly |6.2.1f| | 1 |
| Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Stop lamp not working Application (4.3.1 (a) (ii)) | 1 |
| Offside Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Brake pipe excessively damaged |3.2.B2a| | 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 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Exhaust mounting missing |7.1.1c| | 1 |
| Offside Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Nearside Front Direction indicator obscured |1.5.1a| | 1 |
| Stop lamp does not illuminate immediately a brake applies Rear switch |1.3.1a| | 1 |
| Nearside Rear Lower Exhaust silencer likely to become detached bolt loose (8.1.1 (b) (ii)) | 1 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Headlamp damaged and function impaired |1.2.3a| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Upper Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Brake master cylinder has a seized master cylinder pivot. |3.2.B5| | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Headlamp at least one does not illuminate on dipped beam DIP NOT WORKING PROPERLY |1.2.2a|i|| | 1 |
| Centre Rear Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Stop lamp does not illuminate immediately a brake applies footbrake |1.3.1a| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Offside Front Brake fluid significantly below minimum mark (1.1.10 (d) (ii)) | 1 |
| Nearside Front Brake hose excessively stretched (1.1.12 (b) (ii)) | 1 |
| Nearside Rear Lower Drive chain sprocket so loose it is likely to fail Rear Sprocket nut loose. |6.1.7 |c| |ii|| | 1 |