| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 56 |
| Registration plate issues | 50 |
| Registration plate lamp issues | 18 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Rear reflector on motorcycle missing |1.4.1| | 13 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 9 |
| Rear reflector missing (4.8.2 (a) (ii)) | 6 |
| 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| | 5 |
| Horn not working |1.7.3a| | 5 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition |8.1.1 |a|| | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 3 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Horn not working (7.7 (a) (ii)) | 3 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Front position lamp incorrect colour |1.1.2a| | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Brake disc|s| cracked |3.2.A1g| | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Drive belt worn to excess (6.1.7 (c) (i)) | 1 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Horn not working |1.7.3a| | 1 |
| Rear Rear wheel spindle loose 10 plus |2.4.A.2b| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort possibly due to play in wheel bearings,but could also be run out on discs. |3.3.A1d| | 1 |
| Offside Rear Upper Direction indicator not working |1.5.1c| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Drive chain excessively loose |6.2.1d| | 1 |
| Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Position lamp showing white light to the rear (4.2.3 (a) (ii)) | 1 |
| Rear Rear position lamp incorrect colour |1.1.2b| | 1 |
| Offside Indicator tell tale not functioning |1.5.2| | 1 |
| Offside Rear Exhaust system insecure |6.1.2 |a|| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Nearside Drive belt excessively tight |6.2.1d| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Front Steering headbearing has excessive free play head bearings worn out |2.2.2| | 1 |
| Stop lamp not working Front control (4.3.1 (a) (ii)) | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Rear Suspension arm attachment bracket/mounting insecure (5.3.3 (a) (i)) | 1 |
| Rear Brake cylinder insecure |1.1.16 |c| |i|| | 1 |
| Handlebar so insecure it is likely to become detached Handlebars loose in riser clamps (2.2.1 (b) (ii)) | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Front Stop lamp not working lever (4.3.1 (a) (ii)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Headlamp incorrect colour |1.2.1| | 1 |
| Headlamp incorrect colour (4.1.4 (a)) | 1 |
| Stop lamp does not illuminate immediately a brake applies front |1.3.1a| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Brake performance not tested |3.3| | 1 |
| Gradient brake test No brake control achieves an efficiency of 30%. |3.3.D1a| | 1 |
| Gradient brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.D1b| | 1 |
| Gradient brake test Neither brake control achieves an efficiency of 25% |3.3.D1b| | 1 |
| Rear position lamp missing |1.1.1a| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Nearside Rear Direction indicator missing |1.5.1a| | 1 |
| Offside Rear Direction indicator missing |1.5.1a| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride Brake arm |6.2.1h| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear reflector on motorcycle deteriorated and function impaired |1.4.2a| | 1 |
| Central Front Upper Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Brake pipe likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Hazard warning switch missing |1.4.B.1d| | 1 |
| Rear Brake pedal spongy |3.3.B.1b| | 1 |
| Rear Brake pedal has insufficient reserve movement |3.3.A.5| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Nearside Rear Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Front Direction indicator missing |1.5.1a| | 1 |
| Rear Direction indicator missing |1.5.1a| | 1 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| All direction indicators missing (4.4.1 (a) (ii)) | 1 |
| Front Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Central Front Horn not working (7.7 (a) (ii)) | 1 |
| Central Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Offside Front Brake caliper leaking and braking performance affected leaking badly fluid running on to wheel (1.1.16 (b) (ii)) | 1 |
| Nearside Front Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear Roller brake test indicates a binding brake pedal pivot seized.. |3.3.A1a| | 1 |
| Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 1 |
| Rear Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Drive belt excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 1 |
| Offside Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Front Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 1 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Fuel cap ineffective (6.1.3 (b) (i)) | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Offside Front Direction indicator adversely affected by the operation of another lamp (4.4.3 (b)) | 1 |
| Front Brake hose leaking (1.1.12 (c)) | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Rear 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 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Stop lamp adversely affected by the operation of another lamp (4.3.3 (b)) | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 1 |
| Headlamp insecure (1.2.3b) | 1 |
| Steering control handlebar movement restricted by trapped cables (2.1.2c) | 1 |
| Stop lamp not working When operating front brake |4.3.1 |a| |ii|| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Brake disc fractured |1.1.14 |a| |ii|| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Headlamp aim not tested |4.1.2 |b|| | 1 |
| Brake pedal so insecure that the brake cannot be readily applied |1.1.2 |e| |ii|| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen LED/HID bulb fitted - has no beam pattern (4.1.2 (a)) | 1 |
| Headlamp incorrect colour Additional lamps showing blue light to front of vehicle (4.1.4 (a)) | 1 |
| Rear Stop lamp switch with a delay in operation Brake light flickers on and off during operation (4.3.2 (a) (ii)) | 1 |
| Brake pedal attachment screws loose |3.1.2b| | 1 |