| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 38 |
| Drive chain excessively loose |6.2.1d| | 11 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Registration plate issues | 8 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 7 |
| Horn not working |1.7.3a| | 7 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 6 |
| Rear reflector on motorcycle missing |1.4.1| | 5 |
| Headlamp aim beam image kick up to the offside |1.6| | 5 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 5 |
| Throttle operating incorrectly |6.2.1f| | 5 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Headlamp insecure |1.2.3b| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 3 |
| Offside Rear Direction indicators not working |1.5.1c| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Drive chain excessively loose |6.2.1d| | 3 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Stop lamp missing |1.3.3a| | 3 |
| Rear Direction indicator not working |1.5.1c| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Rear Brake locking device insecure |3.2.A1e| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Nearside Rear Footrest insecure |6.2.1a| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Rear Footrest insecure |6.2.1a| | 2 |
| Fuel system component insecure |7.2.1b| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Offside Throttle operating incorrectly |6.2.1f| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Nearside Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Offside Front Brake disc|s| excessively scored |3.2.A1l| | 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 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Rear Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front Floor brake test indicates a severely grabbing brake |3.3.C2d| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Offside Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Exhaust has part of the system missing |7.1.1a| | 1 |
| Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Nearside Shock absorber likely to become detached (5.3.2 (a) (ii)) | 1 |
| Offside Shock absorber likely to become detached (5.3.2 (a) (ii)) | 1 |
| Suspension component mounting has an unsafe modification shock absorber mountings welded unsatisfactory. Needs extra welding and bracing. (5.3.3 (c) (i)) | 1 |
| Front Throttle operating incorrectly |6.2.1f| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Offside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Front Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Offside Front Throttle control functioning such that safe operation of the motorcycle is adversely affected grip loose (6.2.7 (a) (ii)) | 1 |
| Nearside Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Rear Brake disc|s| cracked |3.2.A1g| | 1 |
| Handlebar fouling on the fuel tank or bodywork on full lock |2.1.4 |b|| | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Engine mounting/bracket fractured |6.1.8 |a| |ii|| | 1 |
| Nearside Front Footrest missing |6.2.1a| | 1 |
| Front Headlamp aim beam image too far to the right |1.6.4| | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Front Brake disc|s| excessively pitted |3.2.A1l| | 1 |
| Offside Rear Brake locking device missing |3.2.A1e| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Rear Brake hose leaking fluid |3.2.B4| | 1 |
| Front Throttle operating incorrectly Not returning on full lock right (6.2.7 (a) (i)) | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Centre Rear Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Front position lamp missing |1.1.1a| | 1 |
| Stop lamp not working from front brake control (4.3.1 (a) (ii)) | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Brake performance not tested |3.3| | 1 |
| Inner Front Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Brake component is severely distorted |3.1.5| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Centre Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Offside Front Throttle operating incorrectly |6.2.1f| | 1 |
| Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Rear Lower Brake component insecure Brake reaction bracket fixing bolt loose (1.1.21 (c)) | 1 |
| Rear Chain guard insecure |6.2.1c| | 1 |
| Drive chain excessively tight |6.1.7 |k| |i|| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Rear Position lamp adversely affected by the operation of another lamp (4.2.3 (b)) | 1 |
| Stop lamp adversely affected by the operation of another lamp (4.3.3 (b)) | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Brake component is fractured rear claipa hanger cracked |3.1.5| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Rear Wheel fixing loose (single fixing) (5.2.1 (a) (ii)) | 1 |
| Rear Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Riders seat insecure |6.2.5 |a| |ii|| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Offside Front Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Brake reaction bracket insecure |3.2.A1j| | 1 |