| Most common failures | No# failures |
|---|
| Registration plate issues | 54 |
| Rear reflector on motorcycle missing |1.4.1| | 47 |
| Headlamp aim out of alignment | 30 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Horn not working |1.7.3a| | 12 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 7 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 7 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 7 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 7 |
| Drive chain excessively loose |6.2.1d| | 7 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Offside Rear Direction indicator not working |1.5.1c| | 6 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 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 |
| Rear reflector missing |4.8.2 |a| |ii|| | 5 |
| Rear Stop lamp missing |1.3.3a| | 5 |
| Rear reflector missing (4.8.2 (a) (ii)) | 5 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Nearside Rear Direction indicator not working |1.5.1c| | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Horn missing |1.7.1| | 4 |
| Nearside Front Direction indicators not working |1.5.1c| | 4 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 3 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Registration plate lamp issues | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies SWITCH |1.3.1a| | 1 |
| Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| 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|| | 1 |
| Rear Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Dipswitch does not operate immediately when selected on main beam Dipswitch missing, wired for dip beam only. (4.1.3 (b)) | 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 |
| Front Stop lamp missing |1.3.3a| | 1 |
| Nearside Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Centre Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Brake disc|s| securing bolt|s| missing |3.2.A1g| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Central Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Central Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Nearside Rear Lower Drive chain worn to excess |6.2.1e| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Rear suspension bearing has excessive free play Swing arm excessively loose |2.4.A2a|i|| | 1 |
| Rear suspension bush has excessive free play front Pro link bushes worn |2.4.A2a|i|| | 1 |
| Stop lamp missing |1.3.3a| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Centre Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear wheel spindle loose |2.4.A.2b| | 1 |
| Front Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 1 |
| Headlamp light source and lamp not compatible (4.1.4 (c)) | 1 |
| Brake fluid reservoir fluid not visible |1.1.10 |d| |iii|| | 1 |
| Throttle operating incorrectly |6.2.7 |a| |i|| | 1 |
| Brake disc|s| cracked |3.2.A1g| | 1 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Front Brake lever has abnormal movement of levers indicating excessive wear or maladjustment (1.1.15 (f)) | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls Front lever does not illuminate brake lamp (4.3.2 (a) (iii)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear reflector missing new fitted (4.8.2 (a) (ii)) | 1 |
| Centre Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Stop lamp does not illuminate immediately a brake applies both front and rear lamps |1.3.1a| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Indicator tell tale not operating correctly |1.5.2| | 1 |
| Offside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Chain guard insecure |6.1.7 |i|| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Rear Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Front Fuel hose leaking |7.2.1a| | 1 |
| Direction indicator missing |1.5.1a| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Wheel alignment incorrect which adversely affects the handling Headstock twisted. |2.5.1| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Centre Front Horn not working |1.7.3a| | 1 |
| Front Drive chain sprocket excessively loose (6.1.7 (c) (i)) | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Brake fluid significantly below minimum mark rear brake fluid (1.1.10 (d) (ii)) | 1 |
| Rear Brake cylinder leaking |1.1.16 |b| |i|| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Rear Wheel spoke excessively loose multiple |5.2.2 |d|| | 1 |
| Rear Wheel spoke cracked |5.2.2 |d|| | 1 |
| Front Lower Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Nearside Rear Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Headlamp aim projected beam image obviously incorrect Kick up to right (4.1.2 (c)) | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Front Wheel spindle loose |5.2.1 |c| |i|| | 1 |
| Nearside Rear Direction indicator obscured |1.5.1a| | 1 |
| Front wheel spindle loose |2.3.5a| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride Front sprocket bolt loose |6.2.1h| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Exhaust has part of the system missing |7.1.1a| | 1 |
| Fuel cap sealing washer missing |7.2.2c| | 1 |
| Brake lever insecure |3.1.2a| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Horn not loud enough to be heard by another road user when used in conjunction with other electrical items |1.7.3a| | 1 |
| Upper Brake caliper|s| insecure mounting bolt missing |3.2.A1j| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Headlamp missing |1.2.3a| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Upper Indicator switch does not operate the direction indicators on the side selected |1.5.4| | 1 |
| Rear position lamp missing |1.1.1a| | 1 |
| Front Front wheel insecure |4.2.3b| | 1 |
| Rear Rear position lamp incorrect colour |1.1.2b| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |